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Investments - BeiGene (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 02, 2020
Net Investment Income [Line Items] |  |  |  |
Payments to Acquire Equity Method Investments | $ 18 | $ 157 | $ 3,219 |
Company's share of profits (losses) of related party | $ (891) | $ (33) | (65) |
BeiGene |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Ownership percentage | 18.20% | 18.40% |  | 20.50%
BeiGene |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Equity Method Investment, Aggregate Cost |  |  |  | $ 2,800
Equity Method Investment, Quoted Market Value | $ 4,200 | $ 5,100 |  | 2,600
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity |  |  |  | $ 2,400
Payments to Acquire Equity Method Investments |  | 50 | 569 |
Equity Method Investment, Change In Carrying Value, Other | 11 | 265 | 34 |
Company's share of profits (losses) of related party | (394) | (265) | (229) |
Equity Method Investment, Amortization of Difference Between Carrying Amount and Underlying Equity | 190 | 172 | $ 109 |
Approximate carrying value of the company's equity method investment | $ 2,200 | $ 2,800 |  |
BeiGene | Minimum |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 8 years |  |  |
BeiGene | Maximum |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |  |  |

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