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Pension and Other Postretirement Benefit Plans - Net Periodic Costs Recognized in Operating Profit and Interest and Sundry (Income) Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Other Postretirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | $ (2) | $ 2 | $ 1 | $ (1)
Operating profit | Other Postretirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | 1 | 1 | 3 | 3
Interest and sundry (income) expense | Other Postretirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | (3) | 1 | (2) | (4)
United States Pension Benefits | Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | (1) | (2) | (1) | (3)
United States Pension Benefits | Operating profit | Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | 0 | 0 | 1 | 1
United States Pension Benefits | Interest and sundry (income) expense | Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | (1) | (2) | (2) | (4)
Foreign Pension Benefits | Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | 2 | 2 | 3 | 5
Foreign Pension Benefits | Operating profit | Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | 1 | 2 | 3 | 3
Foreign Pension Benefits | Interest and sundry (income) expense | Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Net periodic cost | $ 1 | $ 0 | $ 0 | $ 2

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