Investments - Schedules of Concentration of Risk, by Risk Factor (Details) - Shareholders' Equity - Investment Concentration Risk - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Wheels Donlen
Concentration Risk [Line Items]
Investment concentration risk, amount	$ 1,591	$ 1,288
AT&T Inc.
Concentration Risk [Line Items]
Investment concentration risk, amount	$ 1,526
Athora
Concentration Risk [Line Items]
Investment concentration risk, amount		1,232
PK AirFinance
Concentration Risk [Line Items]
Investment concentration risk, amount		999
AP Tundra
Concentration Risk [Line Items]
Investment concentration risk, amount		896
MFI Investments
Concentration Risk [Line Items]
Investment concentration risk, amount		878
SoftBank Vision Fund II
Concentration Risk [Line Items]
Investment concentration risk, amount		789
MidCap Financial
Concentration Risk [Line Items]
Investment concentration risk, amount		788
Cayman Universe
Concentration Risk [Line Items]
Investment concentration risk, amount		756
Concord Music CL A2
Concentration Risk [Line Items]
Investment concentration risk, amount		684
Redding Ridge
Concentration Risk [Line Items]
Investment concentration risk, amount		683
AOP Finance
Concentration Risk [Line Items]
Investment concentration risk, amount		$ 671