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Investments (Commercial Mortgage Loans By Year Of Origination) (Details) - Commercial [Member] $ in Millions | Dec. 31, 2022 USD ($) item | Dec. 31, 2021 USD ($) item
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | $ 1,876 | $ 2,520
Amount originated in prior year | 2,426 | 1,502
Amount originated 2 years prior | 1,306 | 3,105
Amount originated 3 years prior | 2,795 | 2,461
Amount originated 4 years prior | 2,296 | 1,831
Amount originated 5 or more years prior | 6,315 | 5,752
Total | 17,014 | 17,171
Loan-to-value ratio, less than 65% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | 1,769 | 2,384
Amount originated in prior year | 2,354 | 1,358
Amount originated 2 years prior | 1,289 | 2,917
Amount originated 3 years prior | 2,685 | 2,274
Amount originated 4 years prior | 2,225 | 1,655
Amount originated 5 or more years prior | 6,184 | 5,554
Total | $ 16,506 | $ 16,142
Ratio of originations in current year | item | 2.06 | 3.04
Ratio of originations in prior year | item | 3.05 | 3.03
Ratio of originations 2 years prior | item | 3.00 | 2.15
Ratio of originations 3 years prior | item | 2.18 | 2.13
Ratio of originations 4 years prior | item | 2.17 | 2.33
Ratio of originations 5 or more years prior | item | 2.44 | 2.41
Loan-to-value ratio, 65% to 74% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | $ 105 | $ 136
Amount originated in prior year | 72 | 144
Amount originated 2 years prior | 17 | 188
Amount originated 3 years prior | 81 | 172
Amount originated 4 years prior | 71 | 149
Amount originated 5 or more years prior | 131 | 171
Total | $ 477 | $ 960
Ratio of originations in current year | item | 1.50 | 1.74
Ratio of originations in prior year | item | 1.53 | 2.06
Ratio of originations 2 years prior | item | 1.58 | 1.42
Ratio of originations 3 years prior | item | 1.50 | 1.59
Ratio of originations 4 years prior | item | 1.62 | 1.74
Ratio of originations 5 or more years prior | item | 1.75 | 1.76
Loan-to-value ratio, 75% to 100% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | $ 2 |
Amount originated 3 years prior | 29 | $ 15
Amount originated 4 years prior |  | 27
Amount originated 5 or more years prior |  | 27
Total | $ 31 | $ 69
Ratio of originations in current year | item | 1.45 |
Ratio of originations 3 years prior | item | 1.58 | 1.02
Ratio of originations 4 years prior | item |  | 0.83
Ratio of originations 5 or more years prior | item |  | 1.08

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