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Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Contingency [Line Items] |  |  |
Income, United States | $ 2,990 | $ 2,534 | $ 2,782
Income, Foreign | 4,773 | 4,599 | 3,685
Income from continuing operations before income taxes | 7,763 | 7,133 | 6,467
Undistributed Earnings of Foreign Subsidiaries | 34,000 |  |
Current Tax Provision, Federal | 1,577 | 30 | 328
Current Tax Provision, State | 64 | (21) | (37)
Current Tax Provision, Foreign | 1,140 | 1,290 | 1,158
Current Income Tax Expense Benefit | 2,781 | 1,299 | 1,449
Future Tax Provision, Federal | (27) | 318 | 712
Future Tax Provision, State | 84 | 134 | 109
Future Tax Provision, Foreign | 5 | (54) | (159)
Deferred income tax provision | 62 | 398 | 662
Income tax expense | 2,843 | 1,697 | 2,111
Attributable to items credited (charged) to equity and goodwill | $ (128) | $ (299) | $ (114)
Statutory U.S. federal income tax rate | 35.00% | 35.00% | 35.00%
Tax on international activities | (6.40%) | (8.10%) | (2.00%)
Tax audit settlements | (0.70%) | (2.90%) | 0.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent | 8.90% | 0.00% | 0.00%
Other | (0.20%) | (0.20%) | (0.40%)
Effective income tax rate | 36.60% | 23.80% | 32.60%
Income Tax Credits and Adjustments |  |  | $ 68
2011 - 2012 Tax Years [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax Adjustments Settlements And Unusual Provisions |  | $ 206 |
French Tax Law Change [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Income Tax Credits and Adjustments | $ 48 | $ 25 |
Foreign Earnings Repatriation [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Other Information Pertaining To Income Taxes, Monetary |  |  | 274
Tax Year 2015 [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Other Information Pertaining To Income Taxes, Monetary |  |  | $ 45
Tax Year 2016 [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax Adjustments Settlements And Unusual Provisions | 55 |  |
US TCJA Tax Law Change [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Tax Adjustments Settlements And Unusual Provisions | $ 690 |  |

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