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Acquisitions, Development and Divestitures - Discontinued Operations (Details) £ in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended | 18 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2021 GBP (£) | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2021 GBP (£)
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |  |  |  |
Income (Loss) from Discontinued Operations (net of income taxes) | $ 555 | $ 191 | $ (1,488) |  | $ 541 |  |  |
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] |  |  |  |  |  |  |  |
Total Assets | 0 |  | 0 |  |  | $ 18,983 | $ 0 |
Total Liabilities | 0 |  | 0 |  |  | 11,023 | 0 |
Discontinued Operations, Held-for-sale | WPD |  |  |  |  |  |  |  |
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract] |  |  |  |  |  |  |  |
Sales proceeds, net of realized foreign currency hedge losses |  |  | 10,732 | £ 7,800,000 |  |  |  |
Proceeds from Daily Dividend, Divestiture of Business | £ |  |  |  |  |  |  |  | £ 548
Loss on Sale | 38 | 0 | (1,609) |  | 0 |  |  |
Carrying value | 12,397 |  | 12,397 |  |  |  | 12,397 |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Sale of Disposal Group, Net of Tax | 3,600 |  | 3,600 |  |  | 4,000 | 3,600 |
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |  |  |  |
Operating Revenues | 710 | 476 | 1,344 |  | 1,090 |  |  |
Operating Expenses | 214 | 228 | 466 |  | 449 |  |  |
Other Income (Expense) - net | 136 | 66 | 202 |  | 196 |  |  |
Interest Expense | 116 | 89 | 209 |  | 183 |  |  |
Income before income taxes | 516 | 225 | 871 |  | 654 |  |  |
Gain (Loss) on Sale | 38 | 0 | (1,609) |  | 0 |  |  |
Income tax expense | (1) | 34 | 750 |  | 113 |  |  |
Income (Loss) from Discontinued Operations (net of income taxes) | 555 | 191 | (1,488) |  | 541 |  |  |
Disposal Group, Including Discontinued Operation, Income Tax Expense Attributable to Realization of Book-Tax Outside Basis, Domestic |  |  | 647 |  |  |  |  |
Disposal Group, Including Discontinued Operation, Income Tax Expense Attributable to Realization of Book-Tax Outside Basis, Foreign |  |  | 166 |  |  |  |  |
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  | 266 |  |
Accounts receivable and unbilled revenues |  |  |  |  |  | 389 |  |
Price risk management assets |  |  |  |  |  | 146 |  |
Property, plant and equipment, net |  |  |  |  |  | 14,392 |  |
Goodwill |  |  |  |  |  | 2,558 |  |
Other intangibles |  |  |  |  |  | 413 |  |
Pension benefit asset |  |  |  |  |  | 682 |  |
Other assets |  |  |  |  |  | 137 |  |
Total Assets |  |  |  |  |  | 18,983 |  |
Short-term debt and long-term debt due within one year |  |  |  |  |  | 994 |  |
Accounts payable |  |  |  |  |  | 220 |  |
Customer deposits |  |  |  |  |  | 217 |  |
Accrued interest |  |  |  |  |  | 190 |  |
Long-term debt |  |  |  |  |  | 7,938 |  |
Total deferred income taxes |  |  |  |  |  | 1,032 |  |
Price risk management liabilities |  |  |  |  |  | 137 |  |
Other deferred credits and liabilities |  |  |  |  |  | 295 |  |
Total Liabilities |  |  |  |  |  | 11,023 |  |
Net assets |  |  |  |  |  | 7,960 |  |
Gain (Loss) on Sale | 38 | $ 0 | (1,609) |  | $ 0 |  |  |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Sale of Disposal Group, Net of Tax | $ 3,600 |  | 3,600 |  |  | 4,000 | 3,600 |
Net Proceeds From Divestiture Of Businesses |  |  | 10,400 |  |  |  |  |
Proceeds from Divestiture of Businesses, before Foreign Currency Hedge Losses | £ |  |  |  | £ 7,881,000 |  |  |  |
Disposal Group, Including Discontinued Operation, Loss on Foreign Currency Hedge Against Sale or Disposition |  |  |  |  |  |  | $ 386 |
Costs to sell |  |  | $ 69 |  |  |  |  |
Disposal Group, Including Discontinued Operation, Unrealized Gain (Loss) on Derivatives |  |  |  |  |  | $ 125 |  |

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- Definition Amount of accrued but unpaid interest attributable to disposal group held for sale or disposed of. + References No definition available. + Details
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- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans attributable to disposal group held for sale or disposed of. + References No definition available. + Details
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- Definition Amount of direct costs of the business divestiture including legal, accounting, and other costs incurred to consummate the business divestiture attributable to disposal group, including, but not limited to, discontinued operation. + References No definition available. + Details
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- Definition The money or property, attributable to disposal group held for sale or disposed of, received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of the asset attributable to disposal group held for sale or disposed of arising from derivative instruments and hedging activities, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of the liability attributable to disposal group held for sale or disposed of arising from derivative instruments and hedging activities, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer. + References No definition available. + Details
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- Definition Amount of income tax expense (benefit) related to domestic income taxes for discontinued operations charged (credited) directly to shareholders' equity. + References No definition available. + Details
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- Definition Amount of income tax expense (benefit) related to foreign income taxes for discontinued operations charged (credited) directly to shareholders' equity. + References No definition available. + Details
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- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt attributable to disposal group held for sale or disposed of classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References No definition available. + Details
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- Definition The amount of loss realized from foreign currency hedges made to hedge proceeds of a sale or disposition of business attributable to disposal group, including, but not limited to, discontinued operation. + References No definition available. + Details
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- Definition Reflects the carrying amounts of debt attributable to disposal group held for sale or disposed of having initial terms less than one year or the normal operating cycle, if longer, and amounts of debt attributable to disposal group held for sale or disposed of, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. + References No definition available. + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period attributable to disposal group, including, but not limited to, discontinued operation. + References No definition available. + Details
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- Definition Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721523-107759 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109222160&loc=d3e1012-107759 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(12)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109222160&loc=d3e957-107759 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(14)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109222160&loc=d3e1012-107759 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721523-107759 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 + Details
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