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Financing Receivables - Credit Quality - Commercial Mortgage Loans by Property Type (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
Concentrations of credit risk by property type |  |  |  |
Less: allowance for loan losses | $ 59 | $ 59 | $ 48 | $ 50
Commercial Loans |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Less: allowance for loan losses | 52 | 54 | $ 45 | $ 47
Commercial Loans | Commercial mortgage loans |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | 1,861 | 1,882 |  |
Less: allowance for loan losses | 11 | 11 |  |
Total loans | 1,850 | 1,871 |  |
Commercial Loans | Commercial mortgage loans | Apartments |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | 489 | 495 |  |
Commercial Loans | Commercial mortgage loans | Hotel |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | 14 | 14 |  |
Commercial Loans | Commercial mortgage loans | Industrial |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | 310 | 321 |  |
Commercial Loans | Commercial mortgage loans | Mixed use |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | 68 | 66 |  |
Commercial Loans | Commercial mortgage loans | Office |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | 256 | 259 |  |
Commercial Loans | Commercial mortgage loans | Retail |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | 581 | 594 |  |
Commercial Loans | Commercial mortgage loans | Other |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Loans | $ 143 | $ 133 |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 100.00% | 100.00% |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Apartments |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 26.00% | 26.00% |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Hotel |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 1.00% | 1.00% |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Industrial |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 17.00% | 17.00% |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Mixed use |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 3.00% | 4.00% |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Office |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 14.00% | 14.00% |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Retail |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 31.00% | 31.00% |  |
Total commercial mortgage loans | Credit concentration risk | Commercial Loans | Commercial mortgage loans | Other |  |  |  |
Concentrations of credit risk by property type |  |  |  |
Percentage of total | 8.00% | 7.00% |  |

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