Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax benefit at the U.S. federal statutory tax rate	$ (251)	$ (15)	$ (120)
Add (deduct):
Taxation of international operations	3	(43)	(16)
State taxes	(12)	(11)	(8)
Income tax credits	(10)	(13)	(14)
Non-deductible employee compensation	15	7	4
Goodwill and other asset impairments	164	0	0
Other permanent adjustments	19	(2)	(8)
Change in uncertain tax positions	15	3	(2)
Change in valuation allowance	93	80	76
Income tax expense (benefit)	$ 36	$ 6	$ (88)