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Postretirement Benefit Plans - Amounts Recognized on our Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Overfunded retirement plans | $ 218 | $ 92
Accrued expenses and other liabilities & other long-term liabilities | (21) | (11)
Underfunded retirement plans | (93) | (118)
Funded status at end of year | 104 | (37)
U.S. | Defined benefit plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Overfunded retirement plans | 73 | 40
Accrued expenses and other liabilities & other long-term liabilities | (17) | (8)
Underfunded retirement plans | (29) | (37)
Funded status at end of year | 27 | (5)
U.S. | Retiree health care plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Overfunded retirement plans | 0 | 0
Accrued expenses and other liabilities & other long-term liabilities | 0 | 0
Underfunded retirement plans | (3) | (31)
Funded status at end of year | (3) | (31)
Non-U.S. | Defined benefit plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Overfunded retirement plans | 145 | 52
Accrued expenses and other liabilities & other long-term liabilities | (4) | (3)
Underfunded retirement plans | (61) | (50)
Funded status at end of year | $ 80 | $ (1)

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