Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions |
Mar. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Intangible Assets | 听 | 听 |
| Gross carrying amount | $ 8,838 | $ 8,786 |
| Accumulated amortization | (3,606) | (3,408) |
| Net carrying amount | 5,232 | 5,378 |
| FIA Agreement | 听 | 听 |
| Intangible Assets | 听 | 听 |
| Gross carrying amount | 3,630 | 3,630 |
| Accumulated amortization | (791) | (742) |
| Net carrying amount | 2,839 | 2,888 |
| Customer relationships | 听 | 听 |
| Intangible Assets | 听 | 听 |
| Gross carrying amount | 3,053 | 3,053 |
| Accumulated amortization | (1,461) | (1,389) |
| Net carrying amount | 1,592 | 1,664 |
| Licensing agreements | 听 | 听 |
| Intangible Assets | 听 | 听 |
| Gross carrying amount | 356 | 355 |
| Accumulated amortization | (226) | (221) |
| Net carrying amount | 130 | 134 |
| Other | 听 | 听 |
| Intangible Assets | 听 | 听 |
| Gross carrying amount | 1,799 | 1,748 |
| Accumulated amortization | (1,128) | (1,056) |
| Net carrying amount | $ 671 | $ 692 |