Stock Incentive Plans - Schedule of Certain Information Related to Restricted Stock Units (Detail) - Restricted Stock - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 21	$ 16	$ 12
Tax benefit related to stock-based compensation expense	4	3	2
Fair value of units vested	$ 16	$ 5	$ 7

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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