Accumulated Other Comprehensive Loss - AOCI Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	$ 6,775	$ 12,986
Other comprehensive loss, net of tax	(12)	(105)
Amounts reclassified from accumulated other comprehensive income (loss)	328	112
Other comprehensive income (loss), net of tax	316	7	$ (117)
Ending balance	3,616	6,775	12,986
Accumulated other comprehensive income
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	(344)	(351)
Ending balance	(28)	(344)	(351)
Pension Plans
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	21	3
Other comprehensive loss, net of tax	0	18
Amounts reclassified from accumulated other comprehensive income (loss)	(22)	0
Other comprehensive income (loss), net of tax	(22)	18
Ending balance	(1)	21	3
Foreign Currency Translation Adjustments and Other
Increase (Decrease) in Accumulated Other Comprehensive Income
Beginning balance	(365)	(354)
Other comprehensive loss, net of tax	(12)	(123)
Amounts reclassified from accumulated other comprehensive income (loss)	350	112
Other comprehensive income (loss), net of tax	338	(11)
Ending balance	$ (27)	$ (365)	$ (354)