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Investments (excluding Consolidated Investment Entities) - Debt Maturities (Details) - USD ($) | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
Fixed maturities, amortized cost | $ 26,905,000,000 | $ 27,690,000,000
Single issuer in excess of total equity | 0 |
Fixed maturities |  |
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
One year or less, Amortized Cost | 661,000,000 |
After one year through five years, Amortized Cost | 3,869,000,000 |
After five years through ten years, Amortized Cost | 3,806,000,000 |
After ten years, Amortized Cost | 11,552,000,000 |
Fixed maturities, amortized cost | 30,171,000,000 | 30,998,000,000
One year or less, Fair Value | 643,000,000 |
After one year through five years, Fair Value | 3,718,000,000 |
After five years through ten years, Fair Value | 3,642,000,000 |
After ten years, Fair Value | 10,043,000,000 |
Fixed maturities, fair value | 27,472,000,000 | 28,611,000,000
Mortgage-backed securities |  |
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
Without single maturity date, Amortized Cost | 7,599,000,000 |
Without single maturity date, Fair Value | 6,766,000,000 |
Other asset-backed securities |  |
Available-for-sale Securities, Including Securities Pledged [Line Items] |  |
Without single maturity date, Amortized Cost | 2,684,000,000 |
Fixed maturities, amortized cost | 2,684,000,000 | 2,528,000,000
Without single maturity date, Fair Value | 2,660,000,000 |
Fixed maturities, fair value | $ 2,660,000,000 | $ 2,470,000,000

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