Investments - Concentrations of Equity (Details) - Stockholders' Equity, Total - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Cayman Universe
Concentration Risk [Line Items]
Investments	$ 788
MidCap
Concentration Risk [Line Items]
Investments	536
AP Maia
Concentration Risk [Line Items]
Investments	585
AP Hansel
Concentration Risk [Line Items]
Investments	524
AT&T
Concentration Risk [Line Items]
Investments	498
Comcast
Concentration Risk [Line Items]
Investments	437
Mileage Plus
Concentration Risk [Line Items]
Investments	368
AA Warehouse
Concentration Risk [Line Items]
Investments	331
Shell
Concentration Risk [Line Items]
Investments	296
Energy Trans
Concentration Risk [Line Items]
Investments	357
Enterprise Products
Concentration Risk [Line Items]
Investments	305
HWIRE
Concentration Risk [Line Items]
Investments	334
Goldman Sachs
Concentration Risk [Line Items]
Investments	357
FWD Group
Concentration Risk [Line Items]
Investments	400
Verizon
Concentration Risk [Line Items]
Investments	400
JP Morgan Chase
Concentration Risk [Line Items]
Investments	506
Citigroup
Concentration Risk [Line Items]
Investments	529
Venerable Holdings, Inc.
Concentration Risk [Line Items]
Investments	624
Morgan Stanley
Concentration Risk [Line Items]
Investments	657
Apollo Rose II (B), L.P.
Concentration Risk [Line Items]
Investments	543
Bank of America
Concentration Risk [Line Items]
Investments	683
AA Infrastructure
Concentration Risk [Line Items]
Investments	671
SoftBank Vision Fund II
Concentration Risk [Line Items]
Investments	789
AOP Finance
Concentration Risk [Line Items]
Investments	684
AP Tundra Holdings LLC
Concentration Risk [Line Items]
Investments	896
Athora Holding Ltd. [Member]
Concentration Risk [Line Items]
Investments	1,232
PK AirFinance [Member]
Concentration Risk [Line Items]
Investments	999
MFI Investments
Concentration Risk [Line Items]
Investments	878
Concord Music CL A2
Concentration Risk [Line Items]
Investments	756
Athene Freedom Holdings LP
Concentration Risk [Line Items]
Investments	$ 1,288	$ 3,119