Organization record
NICOR INC
All evidence-backed facts for this organization, identity resolved across official registers.
Facts on record
Newest first; every row links to its evidence page.
| Fact | Value | Period | Source |
|---|---|---|---|
| accounts_receivable | {"amount": 231500000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2011-09-30 | sec_edgar |
| accounts_receivable | {"amount": 289400000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2011-06-30 | sec_edgar |
| accounts_receivable | {"amount": 526900000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2011-03-31 | sec_edgar |
| accounts_receivable | {"amount": 472400000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2010-12-31 | sec_edgar |
| accounts_receivable | {"amount": 235700000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2010-09-30 | sec_edgar |
| accounts_receivable | {"amount": 268100000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2010-06-30 | sec_edgar |
| accounts_receivable | {"amount": 536200000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2010-03-31 | sec_edgar |
| accounts_receivable | {"amount": 492100000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2009-12-31 | sec_edgar |
| accounts_receivable | {"amount": 245700000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2009-09-30 | sec_edgar |
| accounts_receivable | {"amount": 310900000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2009-06-30 | sec_edgar |
| capex | {"amount": 190500000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2011-09-30 | sec_edgar |
| capex | {"amount": 117900000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2011-06-30 | sec_edgar |
| capex | {"amount": 57700000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur | 2011-03-31 | sec_edgar |
| capex | {"amount": 226800000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2010-12-31 | sec_edgar |
| capex | {"amount": 148700000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2010-09-30 | sec_edgar |
| capex | {"amount": 97300000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur | 2010-06-30 | sec_edgar |
| capex | {"amount": 42400000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur | 2010-03-31 | sec_edgar |
| capex | {"amount": 220300000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2009-12-31 | sec_edgar |
| capex | {"amount": 165000000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2009-09-30 | sec_edgar |
| capex | {"amount": 111200000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2009-06-30 | sec_edgar |
| capex | {"amount": 249900000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2008-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 41600000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2011-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 42900000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2011-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 36000000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2011-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 31500000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2010-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 75100000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2010-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 59800000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2010-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 57900000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2010-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 55700000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2009-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 52700000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2009-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 43900000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2009-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 26000000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2008-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 42800000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2007-12-31 | sec_edgar |
| cashflow_financing | {"amount": -183000000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2011-09-30 | sec_edgar |
| cashflow_financing | {"amount": -407000000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2011-06-30 | sec_edgar |
| cashflow_financing | {"amount": -295200000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2011-03-31 | sec_edgar |
| cashflow_financing | {"amount": -149800000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2010-12-31 | sec_edgar |
| cashflow_financing | {"amount": -180900000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2010-09-30 | sec_edgar |
| cashflow_financing | {"amount": -426300000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2010-06-30 | sec_edgar |
| cashflow_financing | {"amount": -286800000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2010-03-31 | sec_edgar |
| cashflow_financing | {"amount": -329600000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2009-12-31 | sec_edgar |
| cashflow_financing | {"amount": -437300000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2009-09-30 | sec_edgar |
| cashflow_financing | {"amount": -553600000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2009-06-30 | sec_edgar |
| cashflow_financing | {"amount": 275900000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2008-12-31 | sec_edgar |
| cashflow_investing | {"amount": -172000000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2011-09-30 | sec_edgar |
| cashflow_investing | {"amount": -100800000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2011-06-30 | sec_edgar |
| cashflow_investing | {"amount": -51100000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu | 2011-03-31 | sec_edgar |
| cashflow_investing | {"amount": -229200000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2010-12-31 | sec_edgar |
| cashflow_investing | {"amount": -147500000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2010-09-30 | sec_edgar |
| cashflow_investing | {"amount": -95400000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu | 2010-06-30 | sec_edgar |
| cashflow_investing | {"amount": -35300000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu | 2010-03-31 | sec_edgar |
| cashflow_investing | {"amount": -211500000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2009-12-31 | sec_edgar |
| cashflow_investing | {"amount": -154600000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2009-09-30 | sec_edgar |
| cashflow_investing | {"amount": -98700000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu | 2009-06-30 | sec_edgar |
| cashflow_investing | {"amount": -265300000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2008-12-31 | sec_edgar |
| cashflow_operating | {"amount": 365100000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2011-09-30 | sec_edgar |
| cashflow_operating | {"amount": 519200000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2011-06-30 | sec_edgar |
| cashflow_operating | {"amount": 350800000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2011-03-31 | sec_edgar |
| cashflow_operating | {"amount": 354800000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2010-12-31 | sec_edgar |
| cashflow_operating | {"amount": 347800000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2010-09-30 | sec_edgar |
| cashflow_operating | {"amount": 525800000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2010-06-30 | sec_edgar |
| cashflow_operating | {"amount": 324300000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2010-03-31 | sec_edgar |
| cashflow_operating | {"amount": 570800000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2009-12-31 | sec_edgar |
| cashflow_operating | {"amount": 618600000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2009-09-30 | sec_edgar |
| cashflow_operating | {"amount": 670200000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2009-06-30 | sec_edgar |
| cashflow_operating | {"amount": -27400000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2008-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45545154, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2011-10-25 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45545154, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2011-07-27 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45545154, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2011-04-27 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45549683, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2011-02-16 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45546759, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2010-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45534284, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2010-10-26 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45506484, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2010-07-27 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 45245409, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2009-12-31 | sec_edgar |
| current_assets | {"amount": 788000000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2011-09-30 | sec_edgar |
| current_assets | {"amount": 626500000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2011-06-30 | sec_edgar |
| current_assets | {"amount": 849100000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2011-03-31 | sec_edgar |
| current_assets | {"amount": 953600000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2010-12-31 | sec_edgar |
| current_assets | {"amount": 883400000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2010-09-30 | sec_edgar |
| current_assets | {"amount": 656800000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2010-06-30 | sec_edgar |
| current_assets | {"amount": 946700000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2010-03-31 | sec_edgar |
| current_assets | {"amount": 1003300000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2009-12-31 | sec_edgar |
| current_assets | {"amount": 823700000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2009-09-30 | sec_edgar |
| current_assets | {"amount": 743300000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2009-06-30 | sec_edgar |
| current_liabilities | {"amount": 924300000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2011-09-30 | sec_edgar |
| current_liabilities | {"amount": 720600000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2011-06-30 | sec_edgar |
| current_liabilities | {"amount": 932600000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2011-03-31 | sec_edgar |
| current_liabilities | {"amount": 1074300000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2010-12-31 | sec_edgar |
| current_liabilities | {"amount": 1077500000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2010-09-30 | sec_edgar |
| current_liabilities | {"amount": 861000000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2010-06-30 | sec_edgar |
| current_liabilities | {"amount": 1159300000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2010-03-31 | sec_edgar |
| current_liabilities | {"amount": 1168100000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2009-12-31 | sec_edgar |
| current_liabilities | {"amount": 1015500000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2009-09-30 | sec_edgar |
| current_liabilities | {"amount": 976000000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2009-06-30 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 45545154} | 2011-10-25 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 45545154} | 2011-07-27 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 45545154} | 2011-04-27 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 45549683} | 2011-02-16 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 45534284} | 2010-10-26 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 45506484} | 2010-07-27 | sec_edgar |
| dei:EntityPublicFloat | {"amount": 2500000000, "currency": "USD"} | 2011-06-30 | sec_edgar |
| dei:EntityPublicFloat | {"amount": 1800000000, "currency": "USD"} | 2010-09-30 | sec_edgar |
| dei:EntityPublicFloat | {"amount": 1800000000, "currency": "USD"} | 2010-06-30 | sec_edgar |
| depreciation_amortization | {"amount": 155400000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2011-09-30 | sec_edgar |
| depreciation_amortization | {"amount": 103600000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2011-06-30 | sec_edgar |
| depreciation_amortization | {"amount": 51900000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency" | 2011-03-31 | sec_edgar |
| depreciation_amortization | {"amount": 202700000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2010-12-31 | sec_edgar |
| depreciation_amortization | {"amount": 151900000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2010-09-30 | sec_edgar |
| depreciation_amortization | {"amount": 101200000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2010-06-30 | sec_edgar |
| depreciation_amortization | {"amount": 50600000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency" | 2010-03-31 | sec_edgar |
| depreciation_amortization | {"amount": 195800000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2009-12-31 | sec_edgar |
| depreciation_amortization | {"amount": 147000000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2009-09-30 | sec_edgar |
| depreciation_amortization | {"amount": 98100000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency" | 2009-06-30 | sec_edgar |
| depreciation_amortization | {"amount": 189800000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2008-12-31 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 1.395, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2011-09-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2011-09-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2011-06-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.93, "concept": "us-gaap:CommonStockDividendsPerShareDeclared | 2011-06-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2011-03-31 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 1.86, "concept": "us-gaap:CommonStockDividendsPerShareDeclared | 2010-12-31 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2010-09-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 1.395, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2010-09-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.93, "concept": "us-gaap:CommonStockDividendsPerShareDeclared | 2010-06-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2010-06-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2010-03-31 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 1.86, "concept": "us-gaap:CommonStockDividendsPerShareDeclared | 2009-12-31 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2009-09-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 1.395, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2009-09-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.93, "concept": "us-gaap:CommonStockDividendsPerShareDeclared | 2009-06-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 0.465, "concept": "us-gaap:CommonStockDividendsPerShareDeclare | 2009-06-30 | sec_edgar |
| dividend_per_share | {"per": "shares", "amount": 1.86, "concept": "us-gaap:CommonStockDividendsPerShareDeclared | 2008-12-31 | sec_edgar |
| dividends_paid | {"amount": 64000000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2011-09-30 | sec_edgar |
| dividends_paid | {"amount": 42700000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2011-06-30 | sec_edgar |
| dividends_paid | {"amount": 21400000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2011-03-31 | sec_edgar |
| dividends_paid | {"amount": 85100000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2010-12-31 | sec_edgar |
| dividends_paid | {"amount": 63800000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2010-09-30 | sec_edgar |
| dividends_paid | {"amount": 42400000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2010-06-30 | sec_edgar |
| dividends_paid | {"amount": 21200000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2010-03-31 | sec_edgar |
| dividends_paid | {"amount": 84800000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2009-12-31 | sec_edgar |
| dividends_paid | {"amount": 63500000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2009-09-30 | sec_edgar |
| dividends_paid | {"amount": 42300000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2009-06-30 | sec_edgar |
| dividends_paid | {"amount": 84400000, "concept": "us-gaap:PaymentsOfDividendsCommonStock", "currency": "USD | 2008-12-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.12, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.52, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.42, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.4, "concept": "us-gaap:EarningsPerShareBasic", "currency": " | 2011-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.98, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-03-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 3.02, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-12-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.3, "concept": "us-gaap:EarningsPerShareBasic", "currency": " | 2010-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 2.16, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.86, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.53, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.33, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-03-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 2.99, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2009-12-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.77, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2009-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.3, "concept": "us-gaap:EarningsPerShareBasic", "currency": " | 2009-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.47, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2009-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.5, "concept": "us-gaap:EarningsPerShareBasic", "currency": " | 2009-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 2.64, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2008-12-31 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.12, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2011-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 1.52, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2011-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.42, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2011-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 1.4, "concept": "us-gaap:EarningsPerShareDiluted", "currency": | 2011-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.98, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2011-03-31 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 3.02, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2010-12-31 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 2.15, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2010-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.3, "concept": "us-gaap:EarningsPerShareDiluted", "currency": | 2010-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 1.85, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2010-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.53, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2010-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 1.33, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2010-03-31 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 2.98, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2009-12-31 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.3, "concept": "us-gaap:EarningsPerShareDiluted", "currency": | 2009-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 1.77, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2009-09-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 1.47, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2009-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.5, "concept": "us-gaap:EarningsPerShareDiluted", "currency": | 2009-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 2.63, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2008-12-31 | sec_edgar |
| income_tax_expense | {"amount": 8900000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2011-09-30 | sec_edgar |
| income_tax_expense | {"amount": 38400000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2011-09-30 | sec_edgar |
| income_tax_expense | {"amount": 11000000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2011-06-30 | sec_edgar |
| income_tax_expense | {"amount": 29500000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2011-06-30 | sec_edgar |
| income_tax_expense | {"amount": 18500000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2011-03-31 | sec_edgar |
| income_tax_expense | {"amount": 69700000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2010-12-31 | sec_edgar |
| income_tax_expense | {"amount": 9100000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2010-09-30 | sec_edgar |
| income_tax_expense | {"amount": 50100000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2010-09-30 | sec_edgar |
| income_tax_expense | {"amount": 41000000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2010-06-30 | sec_edgar |
| income_tax_expense | {"amount": 12600000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2010-06-30 | sec_edgar |
| income_tax_expense | {"amount": 28400000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2010-03-31 | sec_edgar |
| income_tax_expense | {"amount": 65100000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2009-12-31 | sec_edgar |
| income_tax_expense | {"amount": 38500000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2009-09-30 | sec_edgar |
| income_tax_expense | {"amount": 9000000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2009-09-30 | sec_edgar |
| income_tax_expense | {"amount": 29500000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2009-06-30 | sec_edgar |
| income_tax_expense | {"amount": 10200000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2009-06-30 | sec_edgar |
| income_tax_expense | {"amount": 44300000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2008-12-31 | sec_edgar |
| industry_sic | {"code": "4924", "scheme": "SIC", "description": "Natural Gas Distribution"} | sec_edgar | |
| interest_expense | {"amount": 24100000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2011-09-30 | sec_edgar |
| interest_expense | {"amount": 8500000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2011-09-30 | sec_edgar |
| interest_expense | {"amount": 8700000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2011-06-30 | sec_edgar |
| interest_expense | {"amount": 15600000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2011-06-30 | sec_edgar |
| interest_expense | {"amount": 6900000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2011-03-31 | sec_edgar |
| interest_expense | {"amount": 38100000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2010-12-31 | sec_edgar |