Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 5,031	$ 5,087	$ 5,946
Other comprehensive income:
Change in pension and retiree health and welfare benefits, net of tax	346	41	(171)
Change in accumulated other comprehensive income (loss) of equity method investees	1	(1)	12
Other comprehensive income (loss), net of tax	347	40	(159)
Total comprehensive income	$ 5,378	$ 5,127	$ 5,787