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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value |  |
Less than one year | $ 1,048 |
One year through five years | 6,507 |
After five years through ten years | 3,552 |
Greater than ten years | 3,310 |
Fair Value | 18,176 | $ 18,492
Unrealized Losses |  |
Less than one year | 20 |
One year through five years | 423 |
After five years through ten years | 395 |
Greater than ten years | 597 |
Unrealized Losses | 1,735 | 1,840
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 730 |
Fair Value | 730 | 721
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 103 |
Unrealized Losses | 103 | 89
Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 875 |
Fair Value | 875 | 992
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 151 |
Unrealized Losses | 151 | 155
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 2,154 |
Fair Value | 2,154 | 2,587
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 46 |
Unrealized Losses | 46 | $ 136
Supporting experience-rated products |  |
Fair Value |  |
Less than one year | 16 |
One year through five years | 151 |
After five years through ten years | 113 |
Greater than ten years | 206 |
Fair Value | 528 |
Unrealized Losses |  |
Less than one year | 1 |
One year through five years | 7 |
After five years through ten years | 14 |
Greater than ten years | 37 |
Unrealized Losses | 63 |
Supporting experience-rated products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 8 |
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 | 16 |
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 | 18 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 1 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 1,032 |
One year through five years | 6,356 |
After five years through ten years | 3,439 |
Greater than ten years | 3,104 |
Fair Value | 17,648 |
Unrealized Losses |  |
Less than one year | 19 |
One year through five years | 416 |
After five years through ten years | 381 |
Greater than ten years | 560 |
Unrealized Losses | 1,672 |
Supporting remaining products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 722 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 102 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 859 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 149 |
Supporting remaining products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 2,136 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 45 |

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