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Other Income, Net (Schedule of Foreign Exchange Gain (Loss)) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Net exchange (losses) gains |  | $ (121) | $ 79 | [1]
Net exchange (losses) gains, tax |  | 68 | (209) |
Net exchange (losses) gains, after-tax |  | (53) | (130) |
Subsidiary Monetary Position Gain (Loss) [Member] |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Net exchange (losses) gains | [2] | 33 | (200) |
Net exchange (losses) gains, tax |  | 13 | (109) |
Net exchange (losses) gains, after-tax |  | 46 | (309) |
Hedging Program Gain (Loss) [Member] |  |  |  |
Foreign Currency Exchange Gain (Loss) [Line Items] |  |  |  |
Net exchange (losses) gains |  | (154) | 279 |
Net exchange (losses) gains, tax |  | 55 | (100) |
Net exchange (losses) gains, after-tax |  | $ (99) | $ 179 |
[1] | Includes a charge of $(40) associated with remeasuring the company's Ukrainian hryvnia net monetary assets in the three months ended March 31, 2015, which were recorded in other income, net in the company's interim Consolidated Income Statements. See Note 5 for additional information.
[2] | Excludes equity affiliates.

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