Financial Instruments - Effect of Interest Rate Swaps on Results of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivatives, Net of Tax	$ 4	$ 1
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI on Derivatives, Net of Tax	3
Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Income into Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swaps	$ 2