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Investments - Unrealized Loss Position Maturities (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value |  |
Less than one year | $ 12 |
One year through five years | 288 |
After five years through ten years | 160 |
Greater than ten years | 208 |
Fair Value | 1,169 | $ 2,409
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 1 |
After five years through ten years | 2 |
Greater than ten years | 3 |
Unrealized Losses | 11 | 36
Residential mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 16 |
Fair Value | 16 | 1
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 | 49 |
Fair Value | 49 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Unrealized Losses | 0 |
Other asset-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 436 |
Fair Value | 436 | 528
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 5 |
Unrealized Losses | 5 | $ 15
Supporting experience-rated products |  |
Fair Value |  |
Less than one year | 0 |
One year through five years | 3 |
After five years through ten years | 9 |
Greater than ten years | 11 |
Fair Value | 33 |
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 | 0 |
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 | 10 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | 0 |
Supporting remaining products |  |
Fair Value |  |
Less than one year | 12 |
One year through five years | 285 |
After five years through ten years | 151 |
Greater than ten years | 197 |
Fair Value | 1,136 |
Unrealized Losses |  |
Less than one year | 0 |
One year through five years | 1 |
After five years through ten years | 2 |
Greater than ten years | 3 |
Unrealized Losses | 11 |
Supporting remaining products | Residential 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 | 0 |
Supporting remaining products | Commercial mortgage-backed securities |  |
Fair Value |  |
Debt securities, maturity, without single maturity date, fair value | 49 |
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 | 426 |
Unrealized Losses |  |
Debt securities, maturity, without single maturity date, unrealized losses | $ 5 |

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