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Investments - Debt Securities by Maturity (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Net Amortized Cost |  |
Less than one year | $ 1,221 |
One year through five years | 6,807 |
After five years through ten years | 5,031 |
Greater than ten years | 4,391 |
Net Amortized Cost | 22,201 | $ 22,174
Fair Value |  |
Less than one year | 1,221 |
One year through five years | 6,503 |
After five years through ten years | 4,559 |
Greater than ten years | 4,022 |
Total | 20,751 | 23,240
Residential mortgage-backed securities |  |
Net Amortized Cost |  |
Debt securities, maturity, without single maturity date | 808 |
Net Amortized Cost | 808 | 870
Fair Value |  |
Debt securities, maturity, without single maturity date | 747 |
Total | 747 | 875
Commercial mortgage-backed securities |  |
Net Amortized Cost |  |
Debt securities, maturity, without single maturity date | 1,222 |
Net Amortized Cost | 1,222 | 1,278
Fair Value |  |
Debt securities, maturity, without single maturity date | 1,108 |
Total | 1,108 | 1,310
Other asset-backed securities |  |
Net Amortized Cost |  |
Debt securities, maturity, without single maturity date | 2,721 |
Net Amortized Cost | 2,721 | 2,791
Fair Value |  |
Debt securities, maturity, without single maturity date | 2,591 |
Total | $ 2,591 | $ 2,792

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