Income Taxes - Allocation of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income tax expense in the consolidated statements of operations:
Attributable to income	$ 197	$ 221	$ 255
Member's equity:
Tax effect of the change in accumulated other comprehensive loss	$ (30)	$ 43	$ 5