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Stockholders' Equity Stockholders' Equity (Reclassifications out of accumulated other Comprehensive Income / (Loss)) (Details) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Cost of goods sold |  | $ 4,371 | $ 4,242
Income Tax Expense (Benefit) |  | 224 | 406
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | 1,338 | 1,229
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax |  | 122 | 115
Other income net |  | 306 | 372
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Income Tax Expense (Benefit) | [1] | 3 | (4)
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax |  | 122 | 115
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Cost of goods sold | [2] | (8) | 11
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | (5) | 7
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] |  |  |
Income Tax Expense (Benefit) | [1] | 0 | 0
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | (1) | 1
Other income net | [3] | (1) | 1
Pension Plan [Member] | Prior service (benefit) cost |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [4] | (1) | (2)
Pension Plan [Member] | Actuarial losses |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [4] | 190 | 172
Pension Plan [Member] | Curtailment loss (gain) |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [4] | 0 | 49
Pension Plan [Member] | Settlement loss |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [4] | 0 | 1
Pension Plan [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | 189 | 220
Reclassification from AOCI, Current Period, Tax | [1] | (65) | (77)
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax |  | 124 | 143
Other Post Employment Benefit Plans [Member] | Prior service (benefit) cost |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [4] | (17) | (39)
Other Post Employment Benefit Plans [Member] | Actuarial losses |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [4] | 23 | 17
Other Post Employment Benefit Plans [Member] | Curtailment loss (gain) |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | [4] | 0 | (30)
Other Post Employment Benefit Plans [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax |  | 6 | (52)
Reclassification from AOCI, Current Period, Tax | [1] | (2) | 16
Reclassification from Accumulated Other Comprehensive Income (Loss), Current Period, Net of Tax |  | $ 4 | $ (36)
[1] | Provision for income taxes from continuing operations.
[2] | Cost of goods sold.
[3] | Other income, net.
[4] | 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 14 for additional information.

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