Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of period	$ 813	$ 876
Decrease in tax positions of current year netted against deferred tax assets	(50)	(34)
Increase in tax positions of prior periods netted against deferred tax assets	43	0
Decrease in tax positions taken in the prior period	0	(2)
Increase in tax positions taken in the current period	0	3
Decreases related to divestitures of businesses	(2)	(30)
Decrease from the lapse of statute of limitations	(5)	0
Unrecognized tax benefits at end of period	$ 799	$ 813