Segment, Geographic and Revenue Information - Investment Management Asset Management Revenues - Reduction of Fees due to Fee Waivers (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Segment Reporting [Abstract] | ||
| Fee waivers | $ 34 | $ 30 |