Investments (excluding Consolidated Investment Entities) - Debt Maturities (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Available-for-sale Securities, Including Securities Pledged [Line Items]
One year or less, Amortized Cost	$ 907
After one year through five years, Amortized Cost	3,595
After five years through ten years, Amortized Cost	3,824
After ten years, Amortized Cost	13,250
Fixed maturities, amortized cost	28,612	$ 28,724
One year or less, Fair Value	906
After one year through five years, Fair Value	3,556
After five years through ten years, Fair Value	3,769
After ten years, Fair Value	11,849
Mortgage-backed securities
Available-for-sale Securities, Including Securities Pledged [Line Items]
Without single maturity date, Amortized Cost	7,220
Without single maturity date, Fair Value	6,656
Other asset-backed securities
Available-for-sale Securities, Including Securities Pledged [Line Items]
Without single maturity date, Amortized Cost	2,845
Fixed maturities, amortized cost	2,845	2,914
Without single maturity date, Fair Value	2,815
Fixed maturities, fair value	2,815	2,903
Fixed maturities
Available-for-sale Securities, Including Securities Pledged [Line Items]
Fixed maturities, amortized cost	31,641	31,852
Fixed maturities, fair value	$ 29,551	$ 30,151

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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