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Business Segments (Schedule of Revenue, By Products and Services) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ 30,357	$ 29,060	$ 28,768
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	30,319	29,023	28,738
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	28,020	26,846	25,990
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	2,299	2,177	2,748
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	30,483	29,187	28,864
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	28,093	26,921	26,024
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	2,390	2,266	2,840
Operating Segments | Retail Electric
Segment Reporting Information [Line Items]
Operating Revenues	24,593	23,484	22,036
Operating Segments | Retail Electric | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	24,593	23,484	22,036
Operating Segments | Wholesale Electric
Segment Reporting Information [Line Items]
Operating Revenues	2,219	2,193	2,882
Operating Segments | Wholesale Electric | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	2,219	2,193	2,882
Operating Segments | Retail Natural Gas
Segment Reporting Information [Line Items]
Operating Revenues	2,320	2,199	2,535
Operating Segments | Retail Natural Gas | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	2,320	2,199	2,535
Operating Segments | Other
Segment Reporting Information [Line Items]
Operating Revenues	1,351	1,311	1,411
Operating Segments | Other | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	1,281	1,244	1,106
Operating Segments | Other | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	$ 70	$ 67	$ 305

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