Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2024 |
Jun. 30, 2023 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||
| Transfers into Level 3 at end of reporting period, net gains (losses) not included in realized and unrealized gains and losses related to Level 3 for the period | $ 3 | $ 0 | $ (5) | $ 7 |
| Transfers out Level 3 at end of reporting period, net gains (losses) included in realized and unrealized gains and losses related to Level 3 for the period. | $ 9 | $ (1) | $ 13 | $ 10 |
| Average original expected lives (in years) | 10 years | |||
| Minimum | ||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||
| Extension period (in years) | 1 year | |||
| Maximum | ||||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||||
| Extension period (in years) | 2 years | |||