v3.26.1
Investments - Mortgage Loans (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Commercial mortgage loans          
Mortgage loan disclosures          
Mortgage loans, purchased $ 124.6 $ 30.4 $ 124.6 $ 70.3  
Mortgage loans, sold 308.5 40.3 356.6 109.2  
Mortgage loans, Total amortized cost $ 16,100.2   $ 16,100.2   $ 16,518.1
Percent of mortgage loans (as a percent) 100.00%   100.00%   100.00%
Amount of financing receivable held for sale sold $ 300.7   $ 300.7    
Commercial mortgage loans | Office          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 2,609.1   $ 2,609.1   $ 2,798.3
Percent of mortgage loans (as a percent) 16.20%   16.20%   16.90%
Commercial mortgage loans | Retail          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 1,479.6   $ 1,479.6   $ 1,580.0
Percent of mortgage loans (as a percent) 9.20%   9.20%   9.60%
Commercial mortgage loans | Industrial          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 4,316.6   $ 4,316.6   $ 4,288.0
Percent of mortgage loans (as a percent) 26.80%   26.80%   26.00%
Commercial mortgage loans | Apartments          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 6,676.5   $ 6,676.5   $ 6,976.9
Percent of mortgage loans (as a percent) 41.50%   41.50%   42.20%
Commercial mortgage loans | Hotel          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 30.4   $ 30.4   $ 31.0
Percent of mortgage loans (as a percent) 0.20%   0.20%   0.20%
Commercial mortgage loans | Mixed use/other          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 988.0   $ 988.0   $ 843.9
Percent of mortgage loans (as a percent) 6.10%   6.10%   5.10%
Commercial mortgage loans | New England          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 409.1   $ 409.1   $ 440.8
Percent of mortgage loans (as a percent) 2.50%   2.50%   2.70%
Commercial mortgage loans | Middle Atlantic          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 4,585.0   $ 4,585.0   $ 4,402.6
Percent of mortgage loans (as a percent) 28.60%   28.60%   26.60%
Commercial mortgage loans | East North Central          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 489.3   $ 489.3   $ 463.2
Percent of mortgage loans (as a percent) 3.00%   3.00%   2.80%
Commercial mortgage loans | West North Central          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 275.3   $ 275.3   $ 284.4
Percent of mortgage loans (as a percent) 1.70%   1.70%   1.70%
Commercial mortgage loans | South Atlantic          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 2,852.9   $ 2,852.9   $ 3,068.4
Percent of mortgage loans (as a percent) 17.70%   17.70%   18.60%
Commercial mortgage loans | East South Central          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 291.7   $ 291.7   $ 366.4
Percent of mortgage loans (as a percent) 1.80%   1.80%   2.20%
Commercial mortgage loans | West South Central          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 1,450.6   $ 1,450.6   $ 1,422.2
Percent of mortgage loans (as a percent) 9.00%   9.00%   8.60%
Commercial mortgage loans | Mountain          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 1,239.0   $ 1,239.0   $ 1,217.9
Percent of mortgage loans (as a percent) 7.70%   7.70%   7.40%
Commercial mortgage loans | Pacific          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 4,027.2   $ 4,027.2   $ 4,327.1
Percent of mortgage loans (as a percent) 25.00%   25.00%   26.20%
Commercial mortgage loans | International          
Mortgage loan disclosures          
Mortgage loans, Total amortized cost $ 480.1   $ 480.1   $ 525.1
Percent of mortgage loans (as a percent) 3.00%   3.00%   3.20%
Residential mortgage loans          
Mortgage loan disclosures          
Mortgage loans, purchased $ 568.6 385.9 $ 884.8 650.9  
Mortgage loans, sold 4.8 $ 5.9 10.5 $ 9.8  
Mortgage loans, Total amortized cost $ 5,176.6   $ 5,176.6   $ 4,694.2