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Investments (Past Due and Interest Accrual Status of Mortgage Loans) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | $ 84,290 | $ 79,860 |
Greater than 90 Days Past Due and Still Accruing Interest | 39 | 37 |
Financing Receivable, Nonaccrual | 762 | 822 |
Financial Asset, Past Due |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | 603 | 587 |
Commercial Mortgage Loans |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | 52,502 | 50,553 |
Greater than 90 Days Past Due and Still Accruing Interest | 6 | 13 |
Financing Receivable, Nonaccrual | 169 | 155 | $ 317
Commercial Mortgage Loans | Financial Asset, Past Due |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | 6 | 13 |
Residential Mortgage Loans |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | 12,482 | 11,196 |
Greater than 90 Days Past Due and Still Accruing Interest | 12 | 8 |
Financing Receivable, Nonaccrual | 462 | 442 | 534
Residential Mortgage Loans | Financial Asset, Past Due |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | 473 | 450 |
Agricultural Mortgage Loans |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | 19,306 | 18,111 |
Greater than 90 Days Past Due and Still Accruing Interest | 21 | 16 |
Financing Receivable, Nonaccrual | 131 | 225 | $ 266
Agricultural Mortgage Loans | Financial Asset, Past Due |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Mortgage Loans, Gross | $ 124 | $ 124 |

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