| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
The following table presents changes in AOCI for the nine-month period ended September 30, 2016: | | | | | | | | | | | | | | | | | | In millions | | Defined Benefit Pension and Postretirement Items (a) | | Change in Cumulative Foreign Currency Translation Adjustments (a) | | Net Gains and Losses on Cash Flow Hedging Derivatives (a) | | Total (a) | Balance, January 1, 2016 | | $ | (3,169 | ) | | $ | (2,549 | ) | | $ | 10 |
| | $ | (5,708 | ) | Other comprehensive income (loss) before reclassifications | | (581 | ) | | 376 |
| | (5 | ) | | (210 | ) | Amounts reclassified from accumulated other comprehensive income | | 471 |
| | (3 | ) | | (7 | ) | | 461 |
| Net Current Period Other Comprehensive Income | | (110 | ) | | 373 |
| | (12 | ) | | 251 |
| Other Comprehensive Income (Loss) Attributable to Noncontrolling Interest | | — |
| | (1 | ) | | — |
| | (1 | ) | Balance, September 30, 2016 | | $ | (3,279 | ) | | $ | (2,177 | ) | | $ | (2 | ) | | $ | (5,458 | ) |
| | (a) | All amounts are net of tax. |
The following table presents changes in AOCI for the three-month period ended September 30, 2016: | | | | | | | | | | | | | | | | | | In millions | | Defined Benefit Pension and Postretirement Items (a) | | Change in Cumulative Foreign Currency Translation Adjustments (a) | | Net Gains and Losses on Cash Flow Hedging Derivatives (a) | | Total (a) | Balance, July 1, 2016 | | $ | (3,298 | ) | | $ | (2,179 | ) | | $ | (4 | ) | | $ | (5,481 | ) | Other comprehensive income (loss) before reclassifications | | (53 | ) | | 3 |
| | 5 |
| | (45 | ) | Amounts reclassified from accumulated other comprehensive income | | 72 |
| | — |
| | (3 | ) | | 69 |
| Net Current Period Other Comprehensive Income (Loss) | | 19 |
| | 3 |
| | 2 |
| | 24 |
| Other Comprehensive Income (Loss) Attributable to Noncontrolling Interest | | — |
| | (1 | ) | | — |
| | (1 | ) | Balance, September 30, 2016 | | $ | (3,279 | ) | | $ | (2,177 | ) | | $ | (2 | ) | | $ | (5,458 | ) |
| | (a) | All amounts are net of tax. |
The following table presents changes in AOCI for the nine-month period ended September 30, 2017: | | | | | | | | | | | | | | | | | | In millions | | Defined Benefit Pension and Postretirement Items (a) | | Change in Cumulative Foreign Currency Translation Adjustments (a) | | Net Gains and Losses on Cash Flow Hedging Derivatives (a) | | Total (a) | Balance, January 1, 2017 | | $ | (3,072 | ) | | $ | (2,287 | ) | | $ | (3 | ) | | $ | (5,362 | ) | Other comprehensive income (loss) before reclassifications | | 1 |
| | 235 |
| | 9 |
| | 245 |
| Amounts reclassified from accumulated other comprehensive income | | 176 |
| | (1 | ) | | (6 | ) | | 169 |
| Net Current Period Other Comprehensive Income | | 177 |
| | 234 |
| | 3 |
| | 414 |
| Other Comprehensive Income (Loss) Attributable to Noncontrolling Interest | | — |
| | (1 | ) | | — |
| | (1 | ) | Balance, September 30, 2017 | | $ | (2,895 | ) | | $ | (2,054 | ) | | $ | — |
| | $ | (4,949 | ) |
| | (a) | All amounts are net of tax. |
The following table presents changes in AOCI for the three-month period ended September 30, 2017: | | | | | | | | | | | | | | | | | | In millions | | Defined Benefit Pension and Postretirement Items (a) | | Change in Cumulative Foreign Currency Translation Adjustments (a) | | Net Gains and Losses on Cash Flow Hedging Derivatives (a) | | Total (a) | Balance, July 1, 2017 | | $ | (2,954 | ) | | $ | (2,155 | ) | | $ | 1 |
| | $ | (5,108 | ) | Other comprehensive income (loss) before reclassifications | | — |
| | 101 |
| | 1 |
| | 102 |
| Amounts reclassified from accumulated other comprehensive income | | 59 |
| | (1 | ) | | (2 | ) | | 56 |
| Net Current Period Other Comprehensive Income (Loss) | | 59 |
| | 100 |
| | (1 | ) | | 158 |
| Other Comprehensive Income (Loss) Attributable to Noncontrolling Interest | | — |
| | 1 |
| | — |
| | 1 |
| Balance, September 30, 2017 | | $ | (2,895 | ) | | $ | (2,054 | ) | | $ | — |
| | $ | (4,949 | ) |
| | (a) | All amounts are net of tax. |
|
| Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
The following table presents details of the reclassifications out of AOCI for the three-month and nine-month periods ended September 30, 2017 and 2016: | | | | | | | | | | | | | | | | | | | | | Details About Accumulated Other Comprehensive Income Components | | Amounts Reclassified from Accumulated Other Comprehensive Income | | Location of Amount Reclassified from AOCI | | Three Months Ended September 30, | | Nine Months Ended September 30, | | | | 2017 | | 2016 | | 2017 | | 2016 | | | In millions: | | | | | | | | | | | | Defined benefit pension and postretirement items: | | | | | | | | | | | | Prior-service costs | | $ | (6 | ) | | $ | (9 | ) | | $ | (19 | ) | | $ | (27 | ) | | (a) | Cost of products sold | Actuarial gains (losses) | | (89 | ) | | (108 | ) | | (266 | ) | | (739 | ) | | (a) | Cost of products sold | Total pre-tax amount | | (95 | ) | | (117 | ) | | (285 | ) | | (766 | ) | | | | Tax (expense) benefit | | 36 |
| | 45 |
| | 109 |
| | 295 |
| | | | Net of tax | | (59 | ) | | (72 | ) | | (176 | ) | | (471 | ) | | | | | | | | | | | | | | | | Change in cumulative foreign currency translation adjustments: | | | | | | | | | | | | Business acquisitions/divestitures | | 1 |
| | — |
| | 1 |
| | 3 |
| | | Net (gains) losses on sales and impairments of businesses | Tax (expense)/benefit | | — |
| | — |
| | — |
| | — |
| | | | Net of tax | | 1 |
| | — |
| | 1 |
| | 3 |
| | | | | | | | | | | | | | | | Net gains and losses on cash flow hedging derivatives: | | | | | | | | | | | | Foreign exchange contracts | | 3 |
| | 5 |
| | 8 |
| | 10 |
| | (b) | Cost of products sold | Total pre-tax amount | | 3 |
| | 5 |
| | 8 |
| | 10 |
| | | | Tax (expense)/benefit | | (1 | ) | | (2 | ) | | (2 | ) | | (3 | ) | | | | Net of tax | | 2 |
| | 3 |
| | 6 |
| | 7 |
| | | | Total reclassifications for the period | | $ | (56 | ) | | $ | (69 | ) | | $ | (169 | ) | | $ | (461 | ) | | | |
| | (a) | These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 16 for additional details). |
| | (b) | This accumulated other comprehensive income component is included in our derivatives and hedging activities (see Note 15 for additional details). |
|