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Insurance (Reconciliation of Disclosure to Liability) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
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 | $ 14,125 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 958 |  |  |
Total unpaid claims and allocated claims adjustment expense | 15,083 |  |  |
Unallocated claims adjustment expenses | 3 |  |  |
Discounting | (1,326) |  |  |
Liability for unpaid claims and claim adjustment liabilities - short-duration | 13,760 |  |  |
Liability for unpaid claims and claim adjustment liabilities - long-duration | 6,653 |  |  |
Liability for Claims and Claims Adjustment Expense | 20,413 | $ 20,013 | $ 18,591 | $ 19,216
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 | 10,686 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 213 |  |  |
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 | 544 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 29 |  |  |
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 | 3,141 |  |  |
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 | 957 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 427 |  |  |
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 | 7,545 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 205 |  |  |
Discounting | (1,200) | $ (1,100) |  |
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 | 405 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 11 |  |  |
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 | 139 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 18 |  |  |
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 | 1,938 |  |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | $ 289 |  |  |

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