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Employee Benefits - Pension and Other Defined Contribution Retirement Plan Expenses (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Amount of correction | $ 17 |  | $ 17 |
Pension Plans | U.S. Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost for benefits earned | 0 | $ 0 | 1 | $ 1
Interest cost on projected benefit obligation | 62 | 4 | 68 | 12
Expected return on plan assets | (92) | (7) | (102) | (21)
Net amortization and deferrals | 23 | 2 | 27 | 6
Net periodic benefit (income) cost | (7) | (1) | (6) | (2)
Pension Plans | Non-U.S. Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost for benefits earned | 10 | 6 | 32 | 18
Interest cost on projected benefit obligation | 3 | 3 | 8 | 9
Expected return on plan assets | (19) | (12) | (44) | (35)
Net amortization and deferrals | 5 | 4 | 15 | 12
Net periodic benefit (income) cost | $ (1) | $ 1 | $ 11 | $ 4

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