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Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |
Capitalized repair and maintenance costs | $ 148 | $ 178
Pension assets | 59 | 174
Deferred income taxes | 40 | 46
Miscellaneous | 45 | 39
Total other assets | $ 292 | $ 437

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