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Accumulated Other Comprehensive Income (Loss) (Income (Expense) Effect of Reclassifications) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Affected Line Item on the Statements of Income |  |  |
Interest Expense | $ (918) | $ (634) | $ (621)
Other Income (Expense) - net | 15 | 2 | 14
Total Pre-tax | 521 | 954 | 919
Income Taxes | (503) | (314) | (183)
Income (Loss) from Discontinued Operations (net of income taxes) | (1,498) | 829 | 1,010
Reclassification out of Accumulated Other Comprehensive Income (Loss) due to Sale of U.K, Utility Business |  |  |
Affected Line Item on the Statements of Income |  |  |
Income Taxes | (660) | 0 | 0
Income (Loss) from Discontinued Operations (net of income taxes) | (3,578) | 0 | 0
Income from Discontinued Operations, before Income Tax | (4,238) | 0 | 0
Amounts Reclassified From Accumulated Other Comprehensive Income [Member] |  |  |
Affected Line Item on the Statements of Income |  |  |
Total After-Tax | (3,731) | (232) | (102)
Qualifying Derivatives [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] |  |  |
Affected Line Item on the Statements of Income |  |  |
Total Pre-tax | (30) | (32) | (18)
Income Taxes | 5 | 8 | 5
Total After-Tax | (25) | (24) | (13)
Qualifying Derivatives [Member] | Interest Rate Swaps [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] |  |  |
Affected Line Item on the Statements of Income |  |  |
Interest Expense | 11 | (8) | (9)
Qualifying Derivatives [Member] | Cross Currency Swaps [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] |  |  |
Affected Line Item on the Statements of Income |  |  |
Interest Expense | (39) | (22) | (9)
Other Income (Expense) - net | (2) | (2) | 0
Defined Benefit Plans [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) due to Sale of U.K, Utility Business |  |  |
Affected Line Item on the Statements of Income |  |  |
Income from Discontinued Operations, before Income Tax | (3,577) | 0 | 0
Defined Benefit Plans [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] |  |  |
Affected Line Item on the Statements of Income |  |  |
Total Pre-tax | (162) | (260) | (112)
Income Taxes | 34 | 52 | 23
Total After-Tax | (128) | (208) | (89)
Defined Benefit Plans [Member] | Prior Service Costs [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] |  |  |
Affected Line Item on the Statements of Income |  |  |
Total Pre-tax | (3) | (4) | (3)
Defined Benefit Plans [Member] | Net Actuarial Loss [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] |  |  |
Affected Line Item on the Statements of Income |  |  |
Total Pre-tax | (159) | (256) | (109)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) due to Sale of U.K, Utility Business |  |  |
Affected Line Item on the Statements of Income |  |  |
Income from Discontinued Operations, before Income Tax | (646) | 0 | 0
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Reclassification out of Accumulated Other Comprehensive Income (Loss) due to Sale of U.K, Utility Business |  |  |
Affected Line Item on the Statements of Income |  |  |
Income from Discontinued Operations, before Income Tax | $ (15) | $ 0 | $ 0

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