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Other (Income) Expense (Details) - Continuing Operations [Member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Other Income and Expenses [Line Items] |  |  |  |  |
Foreign currency transaction (gain) loss and other (income) expense, before tax | $ 5 |  | $ (6) |  | $ 20
Loss associated with corporate aircraft | 2 | [1] | 9 | [1] | 0
Other (income) expense | $ 7 |  | $ 3 |  | $ 20
[1] | During 2016, we made the decision to no longer operate a corporate aircraft fleet and offered our owned aircraft for sale, one of which was sold during 2016 and one that was sold in 2017. The losses associated with these sales reflect the shortfall of the proceeds, including estimated proceeds in held-for-sale impairment evaluations, less any selling costs, over the carrying value of the aircraft.

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- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Foreign currency transaction (gain) loss and other (income) expense, before tax + References No definition available. + Details
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