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Comprehensive Income (Reclassification Out Of AOCI) (Details) - Reclassification Out Of Accumulated Other Comprehensive Income [Member] - OPEB [Member] - Amortization Of Defined Benefit Cost Items [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) before income taxes	$ 6	$ 6
Tax impact	(1)	(1)
Reclassifications, net of tax	$ 5	$ 5

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