Income Taxes - Narrative (Details) € in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 EUR (€)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Income Taxes [Line Items]
Income tax expense (benefit)	$ (60)	$ 2	$ (66)		$ 3
Loss before Income Taxes	(140)	210	(88)		310
Unrecognized Tax Benefits	$ 0		0
Net discrete tax adjustments		$ 2	$ 1		$ 3
Minimum effective corporate tax rate			15.00%	15.00%
U.S. statutory rate	21.00%	21.00%	21.00%	21.00%	21.00%
Corporate average revenue excess amount | €				€ 750
Corporate alternative minimum tax			15.00%	15.00%
U.S.
Income Taxes [Line Items]
Net deferred tax assets, unlimited lives	$ 1,100		$ 1,100			$ 1,000
Net deferred tax assets, limited lives	200		200			200
Deferred tax asset, tax credit carryforwards, foreign	22		22
Foreign Tax Authority
Income Taxes [Line Items]
Net deferred tax assets	1,500		1,500			1,500
Valuation allowance	1,300		1,300			1,200
Foreign Tax Authority | Luxembourg
Income Taxes [Line Items]
Valuation allowance	1,000		1,000
State And Local Authority
Income Taxes [Line Items]
Valuation allowance	22		22			22
Domestic and State and Local Authority
Income Taxes [Line Items]
Net deferred tax assets	$ 1,300		$ 1,300			$ 1,200