Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Goodwill [Roll Forward] | ||
| Goodwill, Beginning of Period | $ 17,888 | $ 16,747 |
| Acquisitions | 2,828 | 1,227 |
| Transfers | 0 | 0 |
| Foreign currency translation and other adjustments | (92) | (86) |
| Goodwill, End of Period | 20,624 | 17,888 |
| Goodwill [Roll Forward] | ||
| Goodwill, Beginning of Period | 17,521 | 16,295 |
| Acquisitions | 2,353 | 1,227 |
| Transfers | 9 | 80 |
| Foreign currency translation and other adjustments | 38 | (81) |
| Goodwill, End of Period | 19,921 | 17,521 |
| Other Bets | ||
| Goodwill [Roll Forward] | ||
| Goodwill, Beginning of Period | 367 | 452 |
| Acquisitions | 475 | 0 |
| Transfers | (9) | (80) |
| Foreign currency translation and other adjustments | (130) | (5) |
| Goodwill, End of Period | $ 703 | $ 367 |