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Investments - Concentration of Equity (Details) - Stockholders' Equity, Total - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
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Wheels Donlen |  |
Concentration Risk [Line Items] |  |
Investments | $ 1,437 | $ 1,288
PK AirFinance |  |
Concentration Risk [Line Items] |  |
Investments | 1,445 | 999
Athora |  |
Concentration Risk [Line Items] |  |
Investments | 1,308 | 1,232
Atlas |  |
Concentration Risk [Line Items] |  |
Investments | 1,004 |
Athora1 |  |
Concentration Risk [Line Items] |  |
Investments | 877 | 896
Atlas1 |  |
Concentration Risk [Line Items] |  |
Investments | 1,362 | 878
SoftBank Vision Fund II |  |
Concentration Risk [Line Items] |  |
Investments |  | 789
MidCap |  |
Concentration Risk [Line Items] |  |
Investments |  | 788
Cayman Universe |  |
Concentration Risk [Line Items] |  |
Investments |  | $ 756
AT&T Inc. |  |
Concentration Risk [Line Items] |  |
Investments | $ 1,509 |

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