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