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Changes in Accumulated Other Comprehensive Loss | 3 Months Ended
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Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Accumulated Other Comprehensive Loss | Changes in Accumulated Other Comprehensive Loss. Changes in accumulated other comprehensive loss consists of the following:
| Post-Retirement Benefits, Net of Tax |  | Hedge Instruments, Net of Tax |  | Translation Adjustments and Other, Net of Tax |  | Total
| (in millions)
Balance, December 31, 2017 | $ | (564 | ) |  | $ | (23 | ) |  | $ | (824 | ) |  | $ | (1,411 | )
Other comprehensive (loss) income before reclassifications, net of tax | — |  |  | (1 | ) |  | 33 |  |  | 32 |
Reclassifications from accumulated other comprehensive loss to earnings | 11 |  |  | — |  |  | — |  |  | 11 |
Other comprehensive income, net of tax | 11 |  |  | (1 | ) |  | 33 |  |  | 43 |
Balance, March 31, 2018 | $ | (553 | ) |  | $ | (24 | ) |  | $ | (791 | ) |  | $ | (1,368 | )

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- Definition Accumulated Other Comprehensive Income (Loss) [Text Block] + References No definition available. + Details
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