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Mortgage Loans by Property Type and Geographic Region (Detail) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 2,372.8 | $ 2,435.4
Mortgage Loans, Percent of Total | 100.00% | 100.00%
New England |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 56.2 | $ 52.4
Mortgage Loans, Percent of Total | 2.40% | 2.20%
Mid-Atlantic |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 188.3 | $ 192.4
Mortgage Loans, Percent of Total | 7.90% | 7.90%
East North Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 301.8 | $ 313.0
Mortgage Loans, Percent of Total | 12.70% | 12.90%
West North Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 172.9 | $ 181.4
Mortgage Loans, Percent of Total | 7.30% | 7.40%
South Atlantic |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 558.3 | $ 539.3
Mortgage Loans, Percent of Total | 23.50% | 22.10%
East South Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 99.8 | $ 101.8
Mortgage Loans, Percent of Total | 4.20% | 4.20%
West South Central |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 208.4 | $ 212.6
Mortgage Loans, Percent of Total | 8.80% | 8.70%
Mountain |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 287.0 | $ 298.7
Mortgage Loans, Percent of Total | 12.10% | 12.30%
Pacific |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 500.1 | $ 543.8
Mortgage Loans, Percent of Total | 21.10% | 22.30%
Apartment |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 679.5 | $ 688.6
Mortgage Loans, Percent of Total | 28.60% | 28.30%
Industrial |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 720.4 | $ 745.3
Mortgage Loans, Percent of Total | 30.40% | 30.60%
Office |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 417.5 | $ 423.0
Mortgage Loans, Percent of Total | 17.60% | 17.40%
Retail |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 512.0 | $ 534.5
Mortgage Loans, Percent of Total | 21.60% | 21.90%
Other Property |  |
Mortgage Loans on Real Estate |  |
Mortgage Loans, Carrying Amount | $ 43.4 | $ 44.0
Mortgage Loans, Percent of Total | 1.80% | 1.80%

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