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Pension and Other Postretirement Benefit Plans (Obligations and Funded Status at End of Year) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Other Postretirement Benefits |  |  |
Funded status |  |  |
Fair value of plan assets | $ 0 | $ 0 | $ 0
Benefit obligations | 355 | 356 | 394
Funded status | (355) | (356) |
Amounts recognized in the consolidated balance sheets |  |  |
Noncurrent asset | 0 | 0 |
Current liability | (33) | (38) |
Noncurrent liability | (322) | (318) |
Amount recognized | (355) | (356) |
Amounts recognized in accumulated other comprehensive loss (pre-tax) |  |  |
Net actuarial loss | 15 | 1 |
Prior service (credit) cost | (16) | (16) |
Amount recognized | (1) | (15) |
United States Pension Benefits | Pension Benefits |  |  |
Funded status |  |  |
Fair value of plan assets | 2,934 | 2,676 | 2,746
Benefit obligations | 3,141 | 3,033 | 3,415
Funded status | (207) | (357) |
Amounts recognized in the consolidated balance sheets |  |  |
Noncurrent asset | 0 | 0 |
Current liability | (6) | (38) |
Noncurrent liability | (201) | (319) |
Amount recognized | (207) | (357) |
Amounts recognized in accumulated other comprehensive loss (pre-tax) |  |  |
Net actuarial loss | 1,329 | 1,445 |
Prior service (credit) cost | 1 | (1) |
Amount recognized | 1,330 | 1,444 |
Foreign Pension Benefits | Pension Benefits |  |  |
Funded status |  |  |
Fair value of plan assets | 593 | 518 | 571
Benefit obligations | 941 | 834 | $ 952
Funded status | (348) | (316) |
Amounts recognized in the consolidated balance sheets |  |  |
Noncurrent asset | 11 | 12 |
Current liability | (17) | (10) |
Noncurrent liability | (342) | (318) |
Amount recognized | (348) | (316) |
Amounts recognized in accumulated other comprehensive loss (pre-tax) |  |  |
Net actuarial loss | 234 | 192 |
Prior service (credit) cost | 4 | (2) |
Amount recognized | $ 238 | $ 190 |

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