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Employee Benefits - Components of Net Periodic Benefit Cost and Changes in Plan Assets and Benefit Obligations Recognized in OCI (Detail) - Postretirement Benefits - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost for benefits earned | $ 1 | $ 1 | $ 1
Interest cost on projected benefit obligation | 1 | 7 | 2
Net amortization and deferrals | (5) | (20) | (5)
Net periodic benefit cost (income) | (3) | (12) | $ (2)
Net actuarial (gain) loss | (16) | (3) |
Recognized actuarial loss | (1) | (2) |
Recognized prior service credit | 6 | 6 |
Total (gain) loss recognized in OCI (before tax effects) | $ (11) | $ 1 |

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