| Line | Label | Object Class | Period Type | Balance | Report ElementName |
|---|---|---|---|---|---|
| 1 | 124200 - Statement - Statement of Income, Additional Statement of Income Elements | [Network] | http://fasb.org/us-gaap/role/statement/StatementOfIncomeAlternateAggregations | ||
| 2 | Supplemental Income Statement Elements [Abstract] | Abstract | us-gaap:SupplementalIncomeStatementElementsAbstract | ||
| 3 | Costs and Expenses, Related Party | Concept (Monetary) | For Period | Debit | us-gaap:CostsAndExpensesRelatedParty |
| 4 | Cost of Domestic Regulated Gas Revenue | Concept (Monetary) | For Period | Debit | us-gaap:CostOfDomesticRegulatedGasRevenue |
| 5 | Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization | Concept (Monetary) | For Period | Debit | us-gaap:CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization |
| 6 | Cost of Merchandise Sales, Buying and Occupancy Costs | Concept (Monetary) | For Period | Debit | us-gaap:CostOfMerchandiseSalesBuyingAndOccupancyCosts |
| 7 | Cost of Services, Excluding Depreciation, Depletion, and Amortization | Concept (Monetary) | For Period | Debit | us-gaap:CostOfServicesExcludingDepreciationDepletionAndAmortization |
| 8 | Cost of Services, Oil and Gas | Concept (Monetary) | For Period | Debit | us-gaap:CostOfServicesOilAndGas |
| 9 | Fees and Commissions, Mortgage Banking and Servicing | Concept (Monetary) | For Period | Credit | us-gaap:FeesAndCommissionsMortgageBankingAndServicing |
| 10 | Gain (Loss) on Sale of Assets and Asset Impairment Charges | Concept (Monetary) | For Period | Credit | us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges |
| 11 | Noninterest Expense Distribution and Servicing Fees | Concept (Monetary) | For Period | Debit | us-gaap:NoninterestExpenseDistributionAndServicingFees |
| 12 | Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses | Concept (Monetary) | For Period | Debit | us-gaap:UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses |
| 13 | Goodwill and Intangible Asset Impairment [Abstract] | Abstract | us-gaap:GoodwillAndIntangibleAssetImpairmentAbstract | ||
| 14 | Goodwill, Impairment Loss | Concept (Monetary) | For Period | Debit | us-gaap:GoodwillImpairmentLoss |
| 15 | Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | Concept (Monetary) | For Period | Debit | us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill |
| 16 | Goodwill and Intangible Asset Impairment, Total | Concept (Monetary) | For Period | Debit | us-gaap:GoodwillAndIntangibleAssetImpairment |
| 17 | Interest Expense [Abstract] | Abstract | us-gaap:InterestExpenseAbstract | ||
| 18 | Interest Costs Incurred | Concept (Monetary) | For Period | Debit | us-gaap:InterestCostsIncurred |
| 19 | Interest Costs Capitalized Adjustment | Concept (Monetary) | For Period | Credit | us-gaap:InterestCostsCapitalizedAdjustment |
| 20 | Interest Expense, Total | Concept (Monetary) | For Period | Debit | us-gaap:InterestExpense |
| 21 | Other Operating Income (Expense), Net | Concept (Monetary) | For Period | Credit | us-gaap:OtherOperatingIncomeExpenseNet |
| 22 | Leasing Commissions Expense | Concept (Monetary) | For Period | Debit | us-gaap:LeasingCommissionsExpense |
| 23 | Interest Income, Other | Concept (Monetary) | For Period | Credit | us-gaap:InterestIncomeOther |