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Investments (Commercial Mortgage Loans By Year Of Origination) (Details) $ in Millions | Jun. 30, 2021 USD ($) item | Dec. 31, 2020 USD ($) item
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year |  | $ 1,536
Amount originated in prior year |  | 3,401
Amount originated 2 years prior |  | 2,583
Amount originated 3 years prior |  | 1,955
Amount originated 4 years prior |  | 1,909
Amount originated 5 or more years prior |  | 4,851
Total |  | 16,235
Loan-to-value ratio, less than 65% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year |  | 1,504
Amount originated in prior year |  | 3,141
Amount originated 2 years prior |  | 2,382
Amount originated 3 years prior |  | 1,786
Amount originated 4 years prior |  | 1,713
Amount originated 5 or more years prior |  | 4,710
Total |  | $ 15,236
Ratio of originations in current year | item |  | 2.86
Ratio of originations in prior year | item |  | 2.25
Ratio of originations 2 years prior | item |  | 2.16
Ratio of originations 3 years prior | item |  | 2.34
Ratio of originations 4 years prior | item |  | 2.37
Ratio of originations 5 or more years prior | item |  | 2.38
Loan-to-value ratio, 65% to 74% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year |  | $ 32
Amount originated in prior year |  | 258
Amount originated 2 years prior |  | 186
Amount originated 3 years prior |  | 169
Amount originated 4 years prior |  | 174
Amount originated 5 or more years prior |  | 133
Total |  | $ 952
Ratio of originations in current year | item |  | 1.52
Ratio of originations in prior year | item |  | 1.78
Ratio of originations 2 years prior | item |  | 1.49
Ratio of originations 3 years prior | item |  | 1.73
Ratio of originations 4 years prior | item |  | 1.56
Ratio of originations 5 or more years prior | item |  | 1.95
Loan-to-value ratio, 75% to 100% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in prior year |  | $ 2
Amount originated 2 years prior |  | 15
Amount originated 4 years prior |  | 22
Amount originated 5 or more years prior |  | 8
Total |  | $ 47
Ratio of originations in prior year | item |  | 1.74
Ratio of originations 2 years prior | item |  | 0.71
Ratio of originations 4 years prior | item |  | 1.58
Ratio of originations 5 or more years prior | item |  | 1.02
Commercial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | $ 1,379 |
Amount originated in prior year | 1,514 |
Amount originated 2 years prior | 3,351 |
Amount originated 3 years prior | 2,515 |
Amount originated 4 years prior | 1,910 |
Amount originated 5 or more years prior | 6,329 |
Total | 16,998 |
Commercial [Member] | Loan-to-value ratio, less than 65% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | 1,298 |
Amount originated in prior year | 1,370 |
Amount originated 2 years prior | 3,037 |
Amount originated 3 years prior | 2,319 |
Amount originated 4 years prior | 1,732 |
Amount originated 5 or more years prior | 6,059 |
Total | $ 15,815 |
Ratio of originations in current year | item | 3.07 |
Ratio of originations in prior year | item | 3.02 |
Ratio of originations 2 years prior | item | 2.19 |
Ratio of originations 3 years prior | item | 2.14 |
Ratio of originations 4 years prior | item | 2.32 |
Ratio of originations 5 or more years prior | item | 2.39 |
Commercial [Member] | Loan-to-value ratio, 65% to 74% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | $ 81 |
Amount originated in prior year | 104 |
Amount originated 2 years prior | 290 |
Amount originated 3 years prior | 181 |
Amount originated 4 years prior | 151 |
Amount originated 5 or more years prior | 232 |
Total | $ 1,039 |
Ratio of originations in current year | item | 1.91 |
Ratio of originations in prior year | item | 1.46 |
Ratio of originations 2 years prior | item | 1.78 |
Ratio of originations 3 years prior | item | 1.50 |
Ratio of originations 4 years prior | item | 1.75 |
Ratio of originations 5 or more years prior | item | 1.75 |
Commercial [Member] | Loan-to-value ratio, 75% to 100% [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in prior year | $ 40 |
Amount originated 2 years prior | 24 |
Amount originated 3 years prior | 15 |
Amount originated 4 years prior | 27 |
Amount originated 5 or more years prior | 38 |
Total | $ 144 |
Ratio of originations in prior year | item | 2.21 |
Ratio of originations 2 years prior | item | 1.79 |
Ratio of originations 3 years prior | item | 1.02 |
Ratio of originations 4 years prior | item | 0.96 |
Ratio of originations 5 or more years prior | item | 1.23 |

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