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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 53	$ 466
Other comprehensive loss, before tax:
Pension and other postretirement expense	(2)	(5)
Other comprehensive loss of equity investees	0	(1)
Other comprehensive loss, before tax	(2)	(6)
comprehensive loss	0	2
Other comprehensive loss, net of tax	(2)	(4)
Total comprehensive income	$ 51	$ 462

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