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Financing Receivables (Credit Quality Information Tables) (Details 3) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 3,340 | $ 3,263 |  |
Less: allowance for loan losses | 23 | 24 | $ 26 | $ 29
Commercial mortgage loans [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | 2,797 | 2,715 |  |
Less: allowance for loan losses | 19 | 19 |  |
Total loans, net | $ 2,778 | $ 2,696 |  |
Percentage of gross commercial mortgage loans | 100.00% | 100.00% |  |
Commercial mortgage loans [Member] | Apartments [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 692 | $ 621 |  |
Percentage of gross commercial mortgage loans | 25.00% | 23.00% |  |
Commercial mortgage loans [Member] | Hotel [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 51 | $ 43 |  |
Percentage of gross commercial mortgage loans | 2.00% | 1.00% |  |
Commercial mortgage loans [Member] | Industrial [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 429 | $ 453 |  |
Percentage of gross commercial mortgage loans | 15.00% | 17.00% |  |
Commercial mortgage loans [Member] | Mixed Use [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 78 | $ 54 |  |
Percentage of gross commercial mortgage loans | 3.00% | 2.00% |  |
Commercial mortgage loans [Member] | Office |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 419 | $ 435 |  |
Percentage of gross commercial mortgage loans | 15.00% | 16.00% |  |
Commercial mortgage loans [Member] | Retail |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 931 | $ 897 |  |
Percentage of gross commercial mortgage loans | 33.00% | 33.00% |  |
Commercial mortgage loans [Member] | Other |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 197 | $ 212 |  |
Percentage of gross commercial mortgage loans | 7.00% | 8.00% |  |
Commercial mortgage loans [Member] | East North Central [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 239 | $ 216 |  |
Percentage of gross commercial mortgage loans | 9.00% | 8.00% |  |
Commercial mortgage loans [Member] | East South Central [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 121 | $ 107 |  |
Percentage of gross commercial mortgage loans | 4.00% | 4.00% |  |
Commercial mortgage loans [Member] | Middle Atlantic [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 182 | $ 187 |  |
Percentage of gross commercial mortgage loans | 6.00% | 7.00% |  |
Commercial mortgage loans [Member] | Mountain [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 251 | $ 237 |  |
Percentage of gross commercial mortgage loans | 9.00% | 9.00% |  |
Commercial mortgage loans [Member] | New England [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 54 | $ 62 |  |
Percentage of gross commercial mortgage loans | 2.00% | 2.00% |  |
Commercial mortgage loans [Member] | Pacific [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 831 | $ 814 |  |
Percentage of gross commercial mortgage loans | 30.00% | 30.00% |  |
Commercial mortgage loans [Member] | South Atlantic [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 723 | $ 731 |  |
Percentage of gross commercial mortgage loans | 26.00% | 27.00% |  |
Commercial mortgage loans [Member] | West North Central [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 214 | $ 213 |  |
Percentage of gross commercial mortgage loans | 8.00% | 8.00% |  |
Commercial mortgage loans [Member] | West South Central [Member] |  |  |  |
Commercial mortgage loans |  |  |  |
Total loans, gross | $ 182 | $ 148 |  |
Percentage of gross commercial mortgage loans | 6.00% | 5.00% |  |

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