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Income Taxes (Details 5) - Continuing Operations [Member] - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Examination [Line Items] |  |  |
Accrued interest and penalties | $ 14 | $ 9 |
Total interest and penalties recorded during the period | 5 | 4 | $ 5
Unrecognized tax benefits reconciliation [Roll Forward] |  |  |
Beginning of Year | 91 | 98 |
Additions on tax positions related to the current year | 3 | 0 |
Additions for tax positions of prior years | 8 | 1 |
Reductions for tax positions of prior years | 0 | (5) |
Reductions for settlements | (1) | (1) |
Reductions due to statute expiration | (1) | (2) |
Foreign currency translation adjustment | 0 | 0 |
End of Year | $ 100 | $ 91 | $ 98

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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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