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Income Taxes (Significant Components Of Income Taxes) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Current |  |  |
Federal | $ 541 | $ 327 | $ 270
State | 53 | 5 | 17
Foreign | 127 | 146 | 158
Deferred |  |  |
Federal | (645) | 18 | 17
State | (6) | 28 | 9
Foreign | (63) | 10 | (33)
Total Income Taxes | $ 7 | $ 534 | $ 438

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