Organization record
QUESTAR GAS CO
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_payable | {"amount": 24000000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2018-09-30 | sec_edgar |
| accounts_payable | {"amount": 28700000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2018-06-30 | sec_edgar |
| accounts_payable | {"amount": 47000000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2018-03-31 | sec_edgar |
| accounts_payable | {"amount": 53800000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2017-12-31 | sec_edgar |
| accounts_payable | {"amount": 72500000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"} | 2016-12-31 | sec_edgar |
| accounts_receivable | {"amount": 34900000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-09-30 | sec_edgar |
| accounts_receivable | {"amount": 68400000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2018-06-30 | sec_edgar |
| accounts_receivable | {"amount": 184200000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2018-03-31 | sec_edgar |
| accounts_receivable | {"amount": 171700000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2017-12-31 | sec_edgar |
| accounts_receivable | {"amount": 35700000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-09-30 | sec_edgar |
| accounts_receivable | {"amount": 52300000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2017-06-30 | sec_edgar |
| accounts_receivable | {"amount": 136700000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2017-03-31 | sec_edgar |
| accounts_receivable | {"amount": 162200000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2016-12-31 | sec_edgar |
| accounts_receivable | {"amount": 24000000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"} | 2016-09-30 | sec_edgar |
| accounts_receivable | {"amount": 168800000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD" | 2015-12-31 | sec_edgar |
| capex | {"amount": 171800000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2018-09-30 | sec_edgar |
| capex | {"amount": 110100000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2018-06-30 | sec_edgar |
| capex | {"amount": 50700000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur | 2018-03-31 | sec_edgar |
| capex | {"amount": 215400000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2017-12-31 | sec_edgar |
| capex | {"amount": 135200000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2017-09-30 | sec_edgar |
| capex | {"amount": 75400000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur | 2017-06-30 | sec_edgar |
| capex | {"amount": 35000000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur | 2017-03-31 | sec_edgar |
| capex | {"amount": 240400000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2016-12-31 | sec_edgar |
| capex | {"amount": 186300000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2016-09-30 | sec_edgar |
| capex | {"amount": 124300000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2016-06-30 | sec_edgar |
| capex | {"amount": 59100000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur | 2016-03-31 | sec_edgar |
| capex | {"amount": 217400000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2015-12-31 | sec_edgar |
| capex | {"amount": 153200000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2015-09-30 | sec_edgar |
| capex | {"amount": 174700000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cu | 2014-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 1700000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2018-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 2500000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2018-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 1500000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2018-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 6700000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2017-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 5900000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2017-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 2100000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2017-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 10000000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2017-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 7600000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2016-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 0, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency": "USD | 2016-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 0, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency": "USD | 2016-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 0, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency": "USD | 2016-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 10500000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2015-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 0, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency": "USD | 2015-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 19800000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency | 2014-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 8800000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2013-12-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 1500000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCash | 2018-03-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 6700000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCash | 2017-12-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 10000000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCas | 2017-03-31 | sec_edgar |
| cash_and_restricted_cash | {"amount": 7600000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCash | 2016-12-31 | sec_edgar |
| cashflow_financing | {"amount": -53000000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2018-09-30 | sec_edgar |
| cashflow_financing | {"amount": -119800000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2018-06-30 | sec_edgar |
| cashflow_financing | {"amount": -23000000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2017-09-30 | sec_edgar |
| cashflow_financing | {"amount": -103000000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2017-06-30 | sec_edgar |
| cashflow_financing | {"amount": -101000000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2017-03-31 | sec_edgar |
| cashflow_financing | {"amount": 46700000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2016-12-31 | sec_edgar |
| cashflow_financing | {"amount": -56100000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2016-09-30 | sec_edgar |
| cashflow_financing | {"amount": -142100000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "c | 2016-03-31 | sec_edgar |
| cashflow_financing | {"amount": 107000000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2015-12-31 | sec_edgar |
| cashflow_financing | {"amount": 26600000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2015-09-30 | sec_edgar |
| cashflow_financing | {"amount": 74600000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2014-12-31 | sec_edgar |
| cashflow_investing | {"amount": -175700000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2018-09-30 | sec_edgar |
| cashflow_investing | {"amount": -111600000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2018-06-30 | sec_edgar |
| cashflow_investing | {"amount": -138900000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2017-09-30 | sec_edgar |
| cashflow_investing | {"amount": -75200000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu | 2017-06-30 | sec_edgar |
| cashflow_investing | {"amount": -34700000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu | 2017-03-31 | sec_edgar |
| cashflow_investing | {"amount": -250700000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2016-12-31 | sec_edgar |
| cashflow_investing | {"amount": -200000000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2016-09-30 | sec_edgar |
| cashflow_investing | {"amount": -59700000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu | 2016-03-31 | sec_edgar |
| cashflow_investing | {"amount": -232400000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2015-12-31 | sec_edgar |
| cashflow_investing | {"amount": -166700000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2015-09-30 | sec_edgar |
| cashflow_investing | {"amount": -177300000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c | 2014-12-31 | sec_edgar |
| cashflow_operating | {"amount": 223700000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2018-09-30 | sec_edgar |
| cashflow_operating | {"amount": 227200000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2018-06-30 | sec_edgar |
| cashflow_operating | {"amount": 188300000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContin | 2018-03-31 | sec_edgar |
| cashflow_operating | {"amount": 141300000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContin | 2017-12-31 | sec_edgar |
| cashflow_operating | {"amount": 160200000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2017-09-30 | sec_edgar |
| cashflow_operating | {"amount": 172700000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2017-06-30 | sec_edgar |
| cashflow_operating | {"amount": 138100000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContin | 2017-03-31 | sec_edgar |
| cashflow_operating | {"amount": 201100000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContin | 2016-12-31 | sec_edgar |
| cashflow_operating | {"amount": 245600000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContin | 2016-09-30 | sec_edgar |
| cashflow_operating | {"amount": 274200000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContin | 2016-06-30 | sec_edgar |
| cashflow_operating | {"amount": 191300000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2016-03-31 | sec_edgar |
| cashflow_operating | {"amount": 116100000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContin | 2015-12-31 | sec_edgar |
| cashflow_operating | {"amount": 120300000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2015-09-30 | sec_edgar |
| cashflow_operating | {"amount": 113700000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2014-12-31 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesIssued"} | 2016-12-31 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesIssued"} | 2015-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2018-10-12 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2018-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2018-07-13 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2018-06-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2018-04-13 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2018-03-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2018-02-16 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2017-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2017-10-13 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2017-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2017-07-14 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2017-06-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2017-04-14 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2017-03-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2017-02-28 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2016-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9189626, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2016-10-15 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2016-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 9200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2015-12-31 | sec_edgar |
| cost_of_revenue | {"amount": 35900000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2018-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 361500000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2018-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 325600000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2018-06-30 | sec_edgar |
| cost_of_revenue | {"amount": 74000000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2018-06-30 | sec_edgar |
| cost_of_revenue | {"amount": 251600000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2018-03-31 | sec_edgar |
| cost_of_revenue | {"amount": 555400000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2017-12-31 | sec_edgar |
| cost_of_revenue | {"amount": 359100000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2017-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 42300000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2017-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 316800000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2017-06-30 | sec_edgar |
| cost_of_revenue | {"amount": 75500000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2017-06-30 | sec_edgar |
| cost_of_revenue | {"amount": 241300000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2017-03-31 | sec_edgar |
| cost_of_revenue | {"amount": 542100000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2016-12-31 | sec_edgar |
| cost_of_revenue | {"amount": 364400000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2016-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 39700000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2016-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 558100000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2015-12-31 | sec_edgar |
| cost_of_revenue | {"amount": 362000000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2015-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 44400000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2015-09-30 | sec_edgar |
| cost_of_revenue | {"amount": 604800000, "concept": "us-gaap:CostOfRevenue", "currency": "USD"} | 2014-12-31 | sec_edgar |
| current_assets | {"amount": 144900000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2018-09-30 | sec_edgar |
| current_assets | {"amount": 135400000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2018-06-30 | sec_edgar |
| current_assets | {"amount": 241600000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2018-03-31 | sec_edgar |
| current_assets | {"amount": 282000000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2017-12-31 | sec_edgar |
| current_assets | {"amount": 196400000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2017-09-30 | sec_edgar |
| current_assets | {"amount": 120900000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2017-06-30 | sec_edgar |
| current_assets | {"amount": 187300000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2017-03-31 | sec_edgar |
| current_assets | {"amount": 262100000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2016-12-31 | sec_edgar |
| current_assets | {"amount": 139000000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2016-09-30 | sec_edgar |
| current_assets | {"amount": 417000000, "concept": "us-gaap:AssetsCurrent", "currency": "USD"} | 2015-12-31 | sec_edgar |
| current_liabilities | {"amount": 340600000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2018-09-30 | sec_edgar |
| current_liabilities | {"amount": 300800000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2018-06-30 | sec_edgar |
| current_liabilities | {"amount": 483700000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2018-03-31 | sec_edgar |
| current_liabilities | {"amount": 552100000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2017-12-31 | sec_edgar |
| current_liabilities | {"amount": 518200000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2017-09-30 | sec_edgar |
| current_liabilities | {"amount": 417000000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2017-06-30 | sec_edgar |
| current_liabilities | {"amount": 410900000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2017-03-31 | sec_edgar |
| current_liabilities | {"amount": 459300000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2016-12-31 | sec_edgar |
| current_liabilities | {"amount": 425500000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2016-09-30 | sec_edgar |
| current_liabilities | {"amount": 508600000, "concept": "us-gaap:LiabilitiesCurrent", "currency": "USD"} | 2015-12-31 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2018-10-12 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2018-07-13 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2018-04-13 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2018-02-16 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2017-10-13 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2017-07-14 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2017-04-14 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2017-02-28 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 9189626} | 2016-10-15 | sec_edgar |
| dei:EntityPublicFloat | {"amount": 0, "currency": "USD"} | 2017-06-30 | sec_edgar |
| dei:EntityPublicFloat | {"amount": 0, "currency": "USD"} | 2016-06-30 | sec_edgar |
| depreciation_amortization | {"amount": 111300000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2015-06-30 | sec_edgar |
| depreciation_amortization | {"amount": 116400000, "concept": "us-gaap:DepreciationDepletionAndAmortization", "currency | 2014-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.29, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2015-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.23, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2015-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.71, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2015-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.99, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2014-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.71, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2014-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.23, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2014-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 1.28, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2015-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.23, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2015-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.71, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2015-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.23, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2014-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.99, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2014-06-30 | sec_edgar |
| eps_diluted | {"per": "shares", "amount": 0.71, "concept": "us-gaap:EarningsPerShareDiluted", "currency" | 2014-06-30 | sec_edgar |
| goodwill | {"amount": 5600000, "concept": "us-gaap:Goodwill", "currency": "USD"} | 2017-12-31 | sec_edgar |
| goodwill | {"amount": 5600000, "concept": "us-gaap:Goodwill", "currency": "USD"} | 2016-12-31 | sec_edgar |
| goodwill | {"amount": 5600000, "concept": "us-gaap:Goodwill", "currency": "USD"} | 2015-12-31 | sec_edgar |
| goodwill | {"amount": 5600000, "concept": "us-gaap:Goodwill", "currency": "USD"} | 2014-12-31 | sec_edgar |
| income_tax_expense | {"amount": -5300000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2018-09-30 | sec_edgar |
| income_tax_expense | {"amount": 10100000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2018-09-30 | sec_edgar |
| income_tax_expense | {"amount": -2200000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2018-06-30 | sec_edgar |
| income_tax_expense | {"amount": 15400000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2018-06-30 | sec_edgar |
| income_tax_expense | {"amount": 17600000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2018-03-31 | sec_edgar |
| income_tax_expense | {"amount": 46500000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2017-12-31 | sec_edgar |
| income_tax_expense | {"amount": 22900000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2017-09-30 | sec_edgar |
| income_tax_expense | {"amount": -5500000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2017-09-30 | sec_edgar |
| income_tax_expense | {"amount": 28400000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2017-06-30 | sec_edgar |
| income_tax_expense | {"amount": -3800000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2017-06-30 | sec_edgar |
| income_tax_expense | {"amount": 32200000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2017-03-31 | sec_edgar |
| income_tax_expense | {"amount": 37100000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2016-12-31 | sec_edgar |
| income_tax_expense | {"amount": 19400000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2016-09-30 | sec_edgar |
| income_tax_expense | {"amount": -8500000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2016-09-30 | sec_edgar |
| income_tax_expense | {"amount": -1200000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2016-06-30 | sec_edgar |
| income_tax_expense | {"amount": 27900000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2016-06-30 | sec_edgar |
| income_tax_expense | {"amount": 29100000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2016-03-31 | sec_edgar |
| income_tax_expense | {"amount": 34800000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2015-12-31 | sec_edgar |
| income_tax_expense | {"amount": 19300000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2015-09-30 | sec_edgar |
| income_tax_expense | {"amount": -5800000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2015-09-30 | sec_edgar |
| income_tax_expense | {"amount": 32000000, "concept": "us-gaap:IncomeTaxExpenseBenefit", "currency": "USD"} | 2014-12-31 | sec_edgar |
| industry_sic | {"code": "4924", "scheme": "SIC", "description": "Natural Gas Distribution"} | sec_edgar | |
| interest_expense | {"amount": 8500000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2017-09-30 | sec_edgar |
| interest_expense | {"amount": 25500000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2017-09-30 | sec_edgar |
| interest_expense | {"amount": 8500000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2017-06-30 | sec_edgar |
| interest_expense | {"amount": 17000000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2017-06-30 | sec_edgar |
| interest_expense | {"amount": 8500000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2017-03-31 | sec_edgar |
| interest_expense | {"amount": 30200000, "concept": "us-gaap:InterestExpense", "currency": "USD"} | 2016-12-31 | sec_edgar |