Accumulated Other Comprehensive Loss - Tax Impact (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	$ 0	$ 2	$ 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax	3	2	3
Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	(2)	4	5
Amounts reclassified from accumulated other comprehensive (income) loss, tax	0	0	0
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	0	0	0
Amounts reclassified from accumulated other comprehensive (income) loss, tax	0	0	0
Post - Retirement Benefit Obligation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss) before reclassifications, tax	2	1	1
Amounts reclassified from accumulated other comprehensive (income) loss, tax	$ 0	$ (1)	$ 0