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Investments - Amortized Cost and Fair Value of Fixed Maturity Available-for-Sale Securities (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Amortized Cost |  |
Amortized Cost | $ 42,312 | $ 37,708
Fair Value |  |
Total fixed maturity available-for-sale securities, Fair Value | 38,029 | 33,095
Other securities, which provide for periodic payments: |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 19,993 | 17,210
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 18,872 | 16,083
Corporates, Non-structured Hybrids, Municipal and Government securities: |  |
Amortized Cost |  |
Due in one year or less | 594 | 536
Due after one year through five years | 4,202 | 3,288
Due after five years through ten years | 2,394 | 2,171
Due after ten years | 15,129 | 14,503
Subtotal, Amortized Cost | 22,319 | 20,498
Fair Value |  |
Due in one year or less | 581 | 527
Due after one year through five years | 4,001 | 3,089
Due after five years through ten years | 2,172 | 1,939
Due after ten years | 12,403 | 11,457
Subtotal, Fair Value | 19,157 | 17,012
Asset-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 13,492 | 12,209
Amortized Cost | 13,492 | 12,209
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 12,840 | 11,467
Total fixed maturity available-for-sale securities, Fair Value | 12,840 | 11,467
Commercial mortgage-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 4,348 | 3,337
Amortized Cost | 4,348 | 3,337
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 3,989 | 3,063
Total fixed maturity available-for-sale securities, Fair Value | 3,989 | 3,063
Structured hybrids |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 26 | 26
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | 27 | 26
Residential mortgage-backed securities |  |
Amortized Cost |  |
Other securities which provide for periodic payments, Amortized Cost | 2,127 | 1,638
Fair Value |  |
Other securities which provide for periodic payments, Fair Value | $ 2,016 | $ 1,527

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