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Other Income, Net (Schedule of Foreign Exchange Gain (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Net exchange gains (losses) | [1] | $ 30 | $ 196 | $ (101)
Net exchange gains (losses), tax |  | (218) | (419) | 35
Net exchange gains (losses), after-tax |  | (188) | (223) | (66)
Subsidiaries [Member] |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Net exchange gains (losses) | [2] | (404) | (410) | (136)
Net exchange gains (losses), tax |  | (61) | (207) | 47
Net exchange gains (losses), after-tax |  | (465) | (617) | (89)
Hedging Program [Member] |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Net exchange gains (losses) |  | 434 | 607 | 35
Net exchange gains (losses), tax |  | (157) | (212) | (12)
Net exchange gains (losses), after-tax |  | $ 277 | $ 395 | $ 23
[1] | The $30 net exchange gain for the year ended December 31, 2015, includes $(58) and $(40) exchange loss associated with the devaluation of the Ukrainian hryvnia and the Argentina peso, respectively. The $196 net exchange gain for the year ended December 31, 2014, includes a $(58), $(46), and $(14) exchange losses, associated with the devaluation of the Venezuelan bolivar, Ukranian hryvnia, and Argentinian peso, respectively. The $(101) net exchange loss for the year ended December 31, 2013, includes a $(33) exchange loss, associated with the devaluation of the Venezuelan bolivar.
[2] | Excludes equity affiliates.

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894 + Details
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