Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Income Taxes [Line Items]
Income tax expense (benefit)	$ 25	$ 58	$ 22	$ 178
Income (loss) before income taxes	59	(106)	369	(492)
Unrecognized Tax Benefits			0
Net discrete tax adjustments	$ 8	$ 2	$ 5	$ 20
U.S. statutory rate	21.00%	21.00%	21.00%	21.00%
Net deferred tax assets	$ 245		$ 245		$ 230
Valuation allowance	26		$ 26		26
Establish valuation allowances				$ 11
Net benefit for various item				5
New Income Tax Law under Inflation Reduction Act, Description			For 2023, we do not anticipate that the 15% corporate alternative minimum tax ("CAMT") under the Inflation Reduction Act of 2022 will apply to us due to the significant pandemic-driven losses we incurred in 2020. As allowed, we elected to not consider the estimated impact of potential future CAMT obligations for purposes of assessing valuation allowances on our deferred tax assets.
Corporate alternative minimum tax			15.00%
U.S.
Income Taxes [Line Items]
Net deferred tax assets, unlimited lives	800		$ 800
Net deferred tax assets, limited lives	400		$ 400
Tax credit carryforward expiration period			2023 and 2042
UNITED KINGDOM
Income Taxes [Line Items]
Establish valuation allowances				$ 14
Foreign Tax Authority
Income Taxes [Line Items]
Net deferred tax assets	1,300		$ 1,300		1,200
Valuation allowance	1,100		$ 1,100		1,000
Foreign Tax Authority | Ending Year
Income Taxes [Line Items]
Tax credit carryforward expiration year			2032
Foreign Tax Authority | Luxembourg
Income Taxes [Line Items]
Valuation allowance	918		$ 918
Domestic and State and Local Authority
Income Taxes [Line Items]
Net deferred tax assets	$ 1,200		$ 1,200		$ 1,100