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Investments - Amortized Cost and Fair Value of Fixed Maturity Available-for-Sale Securities (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Amortized Cost |  |
Total fixed maturity available-for-sale securities, Fair Value | $ 32,508 | $ 30,705
Fair Value |  |
Total fixed maturity available-for-sale securities, Fair Value | 31,478 | 31,990
Other securities which provide for periodic payments: |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 12,915 | 11,962
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 12,900 | 12,442
Corporates, Non-structured Hybrids, Municipal and Government securities: |  |
Amortized Cost |  |
Due in one year or less | 439 | 426
Due after one year through five years | 3,320 | 2,998
Due after five years through ten years | 2,378 | 2,389
Due after ten years | 13,456 | 12,930
Subtotal, Amortized Cost | 19,593 | 18,743
Fair Value |  |
Due in one year or less | 444 | 431
Due after one year through five years | 3,249 | 3,051
Due after five years through ten years | 2,295 | 2,458
Due after ten years | 12,590 | 13,608
Subtotal, Fair Value | 18,578 | 19,548
Asset-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 9,137 | 8,516
Total fixed maturity available-for-sale securities, Fair Value | 9,137 | 8,516
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 9,058 | 8,695
Total fixed maturity available-for-sale securities, Fair Value | 9,058 | 8,695
Commercial mortgage-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 2,951 | 2,684
Total fixed maturity available-for-sale securities, Fair Value | 2,951 | 2,684
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 3,052 | 2,979
Total fixed maturity available-for-sale securities, Fair Value | 3,052 | 2,979
Structured hybrids |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 26 | 31
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 29 | 37
Residential mortgage-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 801 | 731
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | $ 761 | $ 731

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