Fair Values - Nonredeemable Funds by Contractual Maturity (Details) $ in Millions	Mar. 31, 2022 USD ($)
Private equity
Carrying Value of Nonredeemable Funds by Contractual Maturity
Less than 5 years	$ 1,041
5-10 years	1,109
Over 10 years	457
Total	2,607
Real estate
Carrying Value of Nonredeemable Funds by Contractual Maturity
Less than 5 years	327
5-10 years	1,745
Over 10 years	17
Total	$ 2,089