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Mortgage Loans by Property Type and Geographic Region (Detail) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 2,390.0 | $ 2,435.4
Mortgage Loans, Percent of Total | 100.00% | 100.00%
New England |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 56.8 | $ 52.4
Mortgage Loans, Percent of Total | 2.40% | 2.20%
Mid-Atlantic |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 190.3 | $ 192.4
Mortgage Loans, Percent of Total | 8.00% | 7.90%
East North Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 303.8 | $ 313.0
Mortgage Loans, Percent of Total | 12.70% | 12.90%
West North Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 179.5 | $ 181.4
Mortgage Loans, Percent of Total | 7.50% | 7.40%
South Atlantic |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 547.5 | $ 539.3
Mortgage Loans, Percent of Total | 22.90% | 22.10%
East South Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 100.9 | $ 101.8
Mortgage Loans, Percent of Total | 4.20% | 4.20%
West South Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 210.5 | $ 212.6
Mortgage Loans, Percent of Total | 8.80% | 8.70%
Mountain |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 296.6 | $ 298.7
Mortgage Loans, Percent of Total | 12.40% | 12.30%
Pacific |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 504.1 | $ 543.8
Mortgage Loans, Percent of Total | 21.10% | 22.30%
Apartment |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 683.8 | $ 688.6
Mortgage Loans, Percent of Total | 28.60% | 28.30%
Industrial |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 709.7 | $ 745.3
Mortgage Loans, Percent of Total | 29.70% | 30.60%
Office |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 423.3 | $ 423.0
Mortgage Loans, Percent of Total | 17.70% | 17.40%
Retail |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 529.6 | $ 534.5
Mortgage Loans, Percent of Total | 22.20% | 21.90%
Other Property |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 43.6 | $ 44.0
Mortgage Loans, Percent of Total | 1.80% | 1.80%

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