Income Taxes - Allocation of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income tax (benefit) expense in the consolidated statements of operations:
Attributable to income	$ (2)	$ 256	$ 197
Member's equity:
Tax effect of the change in accumulated other comprehensive loss	$ 3	$ (58)	$ (30)