Accumulated Other Comprehensive Income (Loss) - AOCI Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	$ 3,616	$ 6,775
Other comprehensive income (loss), net of tax	2	(12)
Amounts reclassified from accumulated other comprehensive income (loss)		328
Other comprehensive income, net of tax	2	316	$ 7
Ending balance	196	3,616	6,775
Accumulated other comprehensive income
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	(28)	(344)
Ending balance	(26)	(28)	(344)
Pension Plans
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	(1)	21
Other comprehensive income (loss), net of tax	0	0
Amounts reclassified from accumulated other comprehensive income (loss)		(22)
Other comprehensive income, net of tax	0	(22)
Ending balance	(1)	(1)	21
Foreign Currency Translation Adjustments and Other
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	(27)	(365)
Other comprehensive income (loss), net of tax	2	(12)
Amounts reclassified from accumulated other comprehensive income (loss)		350
Other comprehensive income, net of tax	2	338
Ending balance	$ (25)	$ (27)	$ (365)