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Stockholders' Equity Stockholders' Equity (Reclassifications out of accumulated other Comprehensive Income / (Loss)) (Details) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Income Tax Expense (Benefit) |  | $ 744 | $ 696 | $ 1,168
Other income, net |  | 708 | 697 | 1,277
Income from continuing operations after income taxes |  | 2,521 | 1,895 | 3,145
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 335 | 297 | 309
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Income Tax Expense (Benefit) | [1] | (7) | (5) | (6)
Pension Plan [Member] | Prior service (benefit) cost |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [2] | (6) | (9) | 2
Pension Plan [Member] | Actuarial losses |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [2] | 822 | 768 | 601
Pension Plan [Member] | Curtailment loss (gain) |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [2] | 40 | (6) | 4
Pension Plan [Member] | Settlement loss |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [2] | 62 | 76 | 7
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | 918 | 829 | 614
Reclassification from AOCI, Current Period, Tax | [1] | (324) | (294) | (213)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 594 | 535 | 401
Other Post Employment Benefit Plans [Member] | Prior service (benefit) cost |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [2] | (134) | (182) | (214)
Other Post Employment Benefit Plans [Member] | Actuarial losses |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [2] | 78 | 78 | 57
Other Post Employment Benefit Plans [Member] | Curtailment loss (gain) |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [2] | (392) | (274) | 0
Other Post Employment Benefit Plans [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | (448) | (378) | (157)
Reclassification from AOCI, Current Period, Tax | [1] | 150 | 135 | 56
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | (298) | (243) | (101)
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 335 | 297 | 309
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Net Sales and Cost of Goods Sold | [3] | 18 | 12 | 15
Income from continuing operations after income taxes |  | 11 | 7 | 9
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Income Tax Expense (Benefit) | [1] | 0 | 0 | 0
Other income, net | [4] | 28 | (2) | 0
Income from continuing operations after income taxes |  | $ 28 | $ (2) | $ 0
[1] | 2. Provision for income taxes from continuing operations
[2] | 3. These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost of the company's pension and other benefit plans. See Note 17 for additional information.
[3] | 1. Net sales and cost of goods sold
[4] | 4. Other income, net

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