Segment Information Segment Information (Asset Management and Service Fees) (Details) - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Segment Reporting Information [Line Items] | ||||
| Asset management and service fees | [1] | $ 996 | $ 984 | |
| Asset-based management fees | ||||
| Segment Reporting Information [Line Items] | ||||
| Asset management and service fees | 860 | 854 | ||
| Performance-based incentive fees | ||||
| Segment Reporting Information [Line Items] | ||||
| Asset management and service fees | 13 | 7 | ||
| Other fees | ||||
| Segment Reporting Information [Line Items] | ||||
| Asset management and service fees | $ 123 | $ 123 | ||
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