| **Tax Matters - Provision for Taxes on Income (Details) - USD ($) $ in Millions** | 12 Months Ended |
|-----------------------------------------------------------------------------------|-----------------|
||
| **Current income taxes:**                                                         |                 |   |   |   |
| Federal                                                                           |                 | $ 342 | $ 67 | $ 393 |
| State and local                                                                   |                 | (52) | (8) | 85 |
| **Deferred income taxes:**                                                        |                 |   |   |   |
| Federal                                                                           |                 | (419) | 300 | 725 |
| State and local                                                                   |                 | (106) | (36) | (256) |
| Total U.S. tax provision                                                          |                 | (235) | 323 | 948 |
| **International**                                                                 |                 |   |   |   |
| Current income taxes                                                              |                 | 1,532 | 1,951 | 2,321 |
| Deferred income taxes                                                             |                 | (175) | (284) | (149) |
| Total international tax provision                                                 |                 | 1,358 | 1,667 | 2,172 |
| Provision for taxes on income                                                     | [1]             | $ 1,123 | $ 1,990 | $ 3,120 |
|                                                                                   |
| [1]Amounts may not add due to rounding.                                           |

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| - Definition
Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.
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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.
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Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.
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Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.
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Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.
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Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations.
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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