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Income Taxes Income (Loss) Before Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income (Loss) Before Income Taxes [Line Items] |  |  |
Total income before income taxes | $ 2,145 | $ 1,761 | $ 1,884
Ireland |  |  |
Income (Loss) Before Income Taxes [Line Items] |  |  |
Total income before income taxes | (608) | (332) | 184
Foreign |  |  |
Income (Loss) Before Income Taxes [Line Items] |  |  |
Total income before income taxes | $ 2,753 | $ 2,093 | $ 1,700

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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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