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Future Policy Benefits (Reconciliation of Disclosure to Liability) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | $ 14,468 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 1,078 |  |  |
Total unpaid claims and allocated claims adjustment expense | 15,546 |  |  |
Unallocated claims adjustment expenses | 0 |  |  |
Discounting | (1,488) |  |  |
Liability for unpaid claims and claim adjustment liabilities - short-duration | 14,058 |  |  |
Liability for unpaid claims and claim adjustment liabilities - long-duration | 2,410 |  |  |
Liability for Claims and Claims Adjustment Expense | 16,468 | $ 16,098 | $ 15,598 | $ 14,698
UNITED STATES |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 10,944 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 280 |  |  |
Latin America |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 642 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 38 |  |  |
Group Life - Term |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 3,187 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 8 |  |  |
Group Life - Term | Asia |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 1,011 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 475 |  |  |
Group Long-Term Disability |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 7,757 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 272 |  |  |
Discounting | (1,300) | $ (1,200) |  |
Protection Life |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 446 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 14 |  |  |
Protection Health |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 196 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 24 |  |  |
Other insurance lines - all segments combined |  |  |  |
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 1,871 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | $ 285 |  |  |

X
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