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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value |  |
Less than one year | $ 1,072 |
One year through five years | 4,632 |
After five years through ten years | 2,012 |
Greater than ten years | 2,227 |
Fair Value | 12,548 | $ 18,492
Unrealized Losses |  |
Less than one year | 16 |
One year through five years | 229 |
After five years through ten years | 179 |
Greater than ten years | 234 |
Unrealized Losses | 836 | 1,840
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 614 |
Fair Value | 614 | 721
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 60 |
Unrealized Losses | 60 | 89
Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 675 |
Fair Value | 675 | 992
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 100 |
Unrealized Losses | 100 | 155
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 1,316 |
Fair Value | 1,316 | 2,587
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 18 |
Unrealized Losses | 18 | $ 136
Supporting experience- rated products |  |
Fair Value |  |
Less than one year | 15 |
One year through five years | 128 |
After five years through ten years | 87 |
Greater than ten years | 137 |
Fair Value | 403 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 3 |
After five years through ten years | 7 |
Greater than ten years | 14 |
Unrealized Losses | 28 |
Supporting experience- rated products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 9 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 1 |
Supporting experience- rated products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 15 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 2 |
Supporting experience- rated products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 12 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 1 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 1,057 |
One year through five years | 4,504 |
After five years through ten years | 1,925 |
Greater than ten years | 2,090 |
Fair Value | 12,145 |
Unrealized Losses |  |
Less than one year | 16 |
One year through five years | 226 |
After five years through ten years | 172 |
Greater than ten years | 220 |
Unrealized Losses | 808 |
Supporting remaining products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 605 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 59 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 660 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 98 |
Supporting remaining products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 1,304 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 17 |

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