Fair Values - Nonredeemable Funds by Contractual Maturity (Details) $ in Millions	Mar. 31, 2024 USD ($)
Private equity
Carrying Value of Nonredeemable Funds by Contractual Maturity
Less than 5 years	$ 1,122
5-10 years	1,242
Over 10 years	96
Total	2,460
Real estate
Carrying Value of Nonredeemable Funds by Contractual Maturity
Less than 5 years	947
5-10 years	1,816
Over 10 years	40
Total	$ 2,803