Fair Values - Nonredeemable Funds by Contractual Maturity (Details) $ in Millions	Sep. 30, 2024 USD ($)
Private equity
Carrying Value of Nonredeemable Funds by Contractual Maturity
Less than 5 years	$ 1,094
5-10 years	1,421
Over 10 years	97
Total	2,612
Real estate
Carrying Value of Nonredeemable Funds by Contractual Maturity
Less than 5 years	1,867
5-10 years	1,099
Over 10 years	94
Total	$ 3,060