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Net Periodic Pension and Postretirement Benefit Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Pension Plan, Defined Benefit [Member] |  |  |  |
Anticipated cash contributions |  |  |  |
Anticipated cash contributions in current year | $ 4 |  | $ 4 |
Pension Plan, Defined Benefit [Member] | UNITED STATES |  |  |  |
Components of Net Periodic Benefit Costs |  |  |  |
Service cost | 1 | $ 2 | 3 | $ 4
Interest cost | 2 | 2 | 6 | 8
Expected return on plan assets | (4) | (5) | (13) | (16)
Amortization of actuarial loss | (1) |  | (1) |
Net periodic benefit cost | (2) | (1) | (5) | (4)
Anticipated cash contributions |  |  |  |
Anticipated cash contributions in current year | 1 |  | 1 |
Employer contributions |  |  |  |
Employer contributions |  |  | 1 |
Pension Plan, Defined Benefit [Member] | Foreign Pension Plan, Defined Benefit [Member] |  |  |  |
Components of Net Periodic Benefit Costs |  |  |  |
Service cost | 1 | 1 | 3 | 3
Interest cost | 2 | 2 | 7 | 8
Expected return on plan assets | (2) | (2) | (6) | (6)
Amortization of actuarial loss | 1 | 1 | 2 | 2
Net periodic benefit cost | 2 | $ 2 | 6 | 7
Anticipated cash contributions |  |  |  |
Anticipated cash contributions in current year | 3 |  | 3 |
Employer contributions |  |  |  |
Employer contributions |  |  | 2 |
Other Postretirement Benefit Plan, Defined Benefit [Member] |  |  |  |
Components of Net Periodic Benefit Costs |  |  |  |
Interest cost | 1 |  | 2 | 2
Amortization of prior service credit |  |  | (1) | (1)
Net periodic benefit cost | $ 1 |  | $ 1 | $ 1

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