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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017 | [1]
Statement of Comprehensive Income [Abstract] |  |
Reclassification of unrealized losses on cash flow hedges from accumulated other comprehensive income to net income, tax expense | $ 1 | $ 1
Unrealized gains (losses) on foreign currency translation, tax expense | 0 | 0
Other comprehensive income (loss) related to equity method investee, tax (benefit) expense | $ 0 | $ 0
[1] | Prior-period financial information has been retrospectively adjusted as discussed in Note 1.

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- Definition Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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