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Changes in Accumulated Other Comprehensive Loss | 9 Months Ended
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Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Changes In 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 income (loss) before reclassifications, net of tax | 2 |  |  | (3 | ) |  | (86 | ) |  | (87 | )
Reclassifications from accumulated other comprehensive loss to earnings | 19 |  |  | — |  |  | — |  |  | 19 |
Other comprehensive income (loss), net of tax | 21 |  |  | (3 | ) |  | (86 | ) |  | (68 | )
Balance, September 30, 2018 | $ | (543 | ) |  | $ | (26 | ) |  | $ | (910 | ) |  | $ | (1,479 | )

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