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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Jan. 01, 2018
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  | $ (14)
Foreign currency translation adjustments |  |  |  |  |
Beginning Balance | $ (441) | $ (294) |  |  |
Comprehensive income (loss) before reclassifications | (5) | 62 |  |  |
Income taxes associated with comprehensive income (loss) before reclassifications | (4) | 3 |  |  |
Reclassification from accumulated other comprehensive income (loss) | 0 | 0 |  |  |
Income taxes reclassified into net earnings | 0 | 0 |  |  |
Ending Balance | (450) | (229) |  |  |
Hedge instruments |  |  |  |  |
Beginning Balance | 0 | (1) |  |  |
Comprehensive income (loss) before reclassifications | 0 | (5) |  |  |
Income taxes associated with comprehensive income (loss) before reclassifications | 0 | 1 |  |  |
Reclassification from accumulated other comprehensive income (loss) | 0 | 1 |  |  |
Income taxes reclassified into net earnings | 0 | 0 |  |  |
Ending Balance | 0 | (4) |  |  |
Defined benefit postretirement plans |  |  |  |  |
Beginning Balance | (235) | (198) |  |  |
Comprehensive income (loss) before reclassifications | 3 | (4) |  |  |
Income taxes associated with comprehensive income (loss) before reclassifications | 3 | 1 |  |  |
Reclassification from accumulated other comprehensive income (loss) | 3 | 2 |  |  |
Income taxes reclassified into net earnings | (1) | (1) |  |  |
Ending Balance | (227) | (214) |  |  |
Other |  |  |  |  |
Beginning Balance | 2 | 3 |  |  |
Comprehensive income (loss) before reclassifications | 0 | 0 |  |  |
Income taxes associated with comprehensive income (loss) before reclassifications | 0 | 0 |  |  |
Reclassification from accumulated other comprehensive income (loss) | 0 | 0 |  |  |
Income taxes reclassified into net earnings | 0 | 0 |  |  |
Ending Balance | 2 | 3 |  |  |
Total |  |  |  |  |
Beginning Balance | (674) | (490) |  |  |
Comprehensive income (loss) before reclassifications | (2) | 53 |  |  |
Income taxes associated with comprehensive income (loss) before reclassifications | (1) | 5 |  |  |
Reclassification from accumulated other comprehensive income (loss) | 3 | 3 |  |  |
Income taxes reclassified into net earnings | (1) | (1) |  |  |
Ending Balance | $ (674) | $ (490) | $ (675) | $ (444) |

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