| **Accumulated Other Comprehensive Loss, Excluding Noncontrolling Interests (Detail) - USD ($) $ in Millions**                                                                                                                                                                                                     | 3 Months Ended | 6 Months Ended |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **AOCI Attributable to Parent, Net of Tax [Roll Forward]**                                                                                                                                                                                                                                                        |                |           |   |   |  |   |
| Beginning balance                                                                                                                                                                                                                                                                                                 |                | $ 82,685       | $ 68,865 | $ 77,462 |  | $ 63,473 |
| Other comprehensive income/(loss)                                                                                                                                                                                                                                                                                 |                | (968)          | (92) | (1,228) |  | 556 |
| Ending balance                                                                                                                                                                                                                                                                                                    |                | 87,469         | 70,315 | 87,469 |  | 70,315 |
| Accumulated Other Comprehensive Income (Loss) [Member]                                                                                                                                                                                                                                                            |                |           |   |   |  |   |
| **AOCI Attributable to Parent, Net of Tax [Roll Forward]**                                                                                                                                                                                                                                                        |                |           |   |   |  |   |
| Beginning balance                                                                                                                                                                                                                                                                                                 |                | (6,157)        | (4,664) | (5,897) |  | (5,310) |
| Other comprehensive income/(loss)                                                                                                                                                                                                                                                                                 |                | (963)          | (94) | (1,223) | [1] | 552 |
| Ending balance                                                                                                                                                                                                                                                                                                    |                | (7,119)        | $ (4,758) | (7,119) |  | $ (4,758) |
| Foreign Currency Translation Adjustment [Member]                                                                                                                                                                                                                                                                  |                |           |   |   |  |   |
| **AOCI Attributable to Parent, Net of Tax [Roll Forward]**                                                                                                                                                                                                                                                        |                |           |   |   |  |   |
| Beginning balance                                                                                                                                                                                                                                                                                                 |                |           |   | (6,172) |  |   |
| Other comprehensive income/(loss)                                                                                                                                                                                                                                                                                 | [1]            |           |   | (1,440) |  |   |
| Ending balance                                                                                                                                                                                                                                                                                                    |                | (7,612)        |   | (7,612) |  |   |
| Derivative Financial Instruments [Member]                                                                                                                                                                                                                                                                         |                |           |   |   |  |   |
| **AOCI Attributable to Parent, Net of Tax [Roll Forward]**                                                                                                                                                                                                                                                        |                |           |   |   |  |   |
| Beginning balance                                                                                                                                                                                                                                                                                                 |                |           |   | 119 |  |   |
| Other comprehensive income/(loss)                                                                                                                                                                                                                                                                                 | [1]            |           |   | 392 |  |   |
| Ending balance                                                                                                                                                                                                                                                                                                    |                | 511            |   | 511 |  |   |
| Available-For-Sale Securities [Member]                                                                                                                                                                                                                                                                            |                |           |   |   |  |   |
| **AOCI Attributable to Parent, Net of Tax [Roll Forward]**                                                                                                                                                                                                                                                        |                |           |   |   |  |   |
| Beginning balance                                                                                                                                                                                                                                                                                                 |                |           |   | (220) |  |   |
| Other comprehensive income/(loss)                                                                                                                                                                                                                                                                                 | [1]            |           |   | (116) |  |   |
| Ending balance                                                                                                                                                                                                                                                                                                    |                | (336)          |   | (336) |  |   |
| Prior Service (Costs)/Credits and Other [Member]                                                                                                                                                                                                                                                                  |                |           |   |   |  |   |
| **AOCI Attributable to Parent, Net of Tax [Roll Forward]**                                                                                                                                                                                                                                                        |                |           |   |   |  |   |
| Beginning balance                                                                                                                                                                                                                                                                                                 |                |           |   | 377 |  |   |
| Other comprehensive income/(loss)                                                                                                                                                                                                                                                                                 | [1]            |           |   | (59) |  |   |
| Ending balance                                                                                                                                                                                                                                                                                                    |                | $ 318          |   | $ 318 |  |   |
|                                                                                                                                                                                                                                                                                                                   |
| [1]Amounts do not include foreign currency translation adjustments attributable to noncontrolling interests. Foreign currency translation adjustments include net losses related to our equity method investment in the Consumer Healthcare JV (see Note 2C)and the impact of our net investment hedging program. |

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| - Definition
A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.
+ References
No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after tax and reclassification adjustments of other comprehensive income (loss).
+ References
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| - Definition
Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.
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