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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value |  |
Less than one year | $ 23 |
One year through five years | 1,006 |
After five years through ten years | 628 |
Greater than ten years | 238 |
Fair Value | 3,067 | $ 915
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 7 |
After five years through ten years | 11 |
Greater than ten years | 5 |
Unrealized Losses | 32 | 11
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 398 |
Fair Value | 398 | 26
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 3 |
Unrealized Losses | 3 | 0
Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 241 |
Fair Value | 241 | 75
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 5 |
Unrealized Losses | 5 | 0
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 533 |
Fair Value | 533 | 297
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 1 |
Unrealized Losses | 1 | $ 2
Supporting experience-rated products |  |
Fair Value |  |
Less than one year | 0 |
One year through five years | 1 |
After five years through ten years | 15 |
Greater than ten years | 2 |
Fair Value | 25 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 0 |
After five years through ten years | 0 |
Greater than ten years | 1 |
Unrealized Losses | 1 |
Supporting experience-rated products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 0 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting experience-rated products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 6 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting experience-rated products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 1 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 23 |
One year through five years | 1,005 |
After five years through ten years | 613 |
Greater than ten years | 236 |
Fair Value | 3,042 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 7 |
After five years through ten years | 11 |
Greater than ten years | 4 |
Unrealized Losses | 31 |
Supporting remaining products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 398 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 3 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 235 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 5 |
Supporting remaining products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 532 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 1 |

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