Stock Incentive Plan - Additional Information (Detail) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares from treasury stock utilized by the Plan	122	69
Restricted Stock Units And Performance Stock Units
Share Based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock compensation cost	$ 2	$ 4

Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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-Name Accounting Standards Codification
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-Section S99
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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