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Investments (excluding Consolidated Investment Entities) - Debt Maturities (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
One year or less, Amortized Cost | $ 719 |
After one year through five years, Amortized Cost | 3,892 |
After five years through ten years, Amortized Cost | 3,800 |
After ten years, Amortized Cost | 12,670 |
Fixed maturities, amortized cost | 28,336 | $ 26,536
One year or less, Fair Value | 714 |
After one year through five years, Fair Value | 3,875 |
After five years through ten years, Fair Value | 3,803 |
After ten years, Fair Value | 11,588 |
Mortgage-backed securities |  |
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
Without single maturity date, Amortized Cost | 7,603 |
Without single maturity date, Fair Value | 7,024 |
Other asset-backed securities |  |
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
Without single maturity date, Amortized Cost | 2,888 |
Fixed maturities, amortized cost | 2,888 | 2,779
Without single maturity date, Fair Value | 2,879 |
Fixed maturities, fair value | 2,879 | 2,769
Fixed maturities |  |
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
Fixed maturities, amortized cost | 31,572 | 30,050
Fixed maturities, fair value | $ 29,883 | $ 27,454

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