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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value |  |
Less than one year | $ 9 |
One year through five years | 300 |
After five years through ten years | 169 |
Greater than ten years | 39 |
Fair Value | 915 | $ 1,169
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 4 |
After five years through ten years | 4 |
Greater than ten years | 1 |
Unrealized Losses | 11 | 11
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 26 |
Fair Value | 26 | 16
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Unrealized Losses | 0 | 0
Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 75 |
Fair Value | 75 | 49
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Unrealized Losses | 0 | 0
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 297 |
Fair Value | 297 | 436
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 2 |
Unrealized Losses | 2 | $ 5
Supporting experience- rated products |  |
Fair Value |  |
Less than one year | 0 |
One year through five years | 0 |
After five years through ten years | 4 |
Greater than ten years | 3 |
Fair Value | 14 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 0 |
After five years through ten years | 0 |
Greater than ten years | 0 |
Unrealized Losses | 0 |
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 | 2 |
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 | 5 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 9 |
One year through five years | 300 |
After five years through ten years | 165 |
Greater than ten years | 36 |
Fair Value | 901 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 4 |
After five years through ten years | 4 |
Greater than ten years | 1 |
Unrealized Losses | 11 |
Supporting remaining products | Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 26 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 73 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products | Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 292 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 2 |

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