v3.26.3
Investments - Financing Receivable, Aging (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Financing receivables, non-accrual and aging disclosures    
Direct financing leases, Total amortized cost   $ 576.5
Mortgage loans and direct financing leases and other loans, Total amortized cost $ 20,740.2 21,978.4
Mortgage loans and direct financing leases and other loans, Recorded investment 90 days or more past due and accruing 8.3 56.7
Reinsurance recoverable and deposit receivable 18,113.6 19,003.3
30 to 59 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Direct financing leases, Total amortized cost   3.9
Mortgage loans and direct financing leases and other loans, Total amortized cost 23.4 76.9
60 to 89 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Direct financing leases, Total amortized cost   0.9
Mortgage loans and direct financing leases and other loans, Total amortized cost 4.5 24.1
90 Days or More Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and direct financing leases and other loans, Total amortized cost 173.9 135.7
Past Due    
Financing receivables, non-accrual and aging disclosures    
Direct financing leases, Total amortized cost   4.8
Mortgage loans and direct financing leases and other loans, Total amortized cost 201.8 236.7
Reinsurance recoverable and deposit receivable 0.0 0.0
Current    
Financing receivables, non-accrual and aging disclosures    
Direct financing leases, Total amortized cost   571.7
Mortgage loans and direct financing leases and other loans, Total amortized cost 20,538.4 21,741.7
Commercial mortgage loans    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 15,353.7 16,518.1
Mortgage loans, Recorded investment 90 days or more past due and accruing   42.6
Commercial mortgage loans | 30 to 59 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost   5.9
Commercial mortgage loans | 60 to 89 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost   1.4
Commercial mortgage loans | 90 Days or More Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 149.6 101.0
Commercial mortgage loans | Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 149.6 108.3
Commercial mortgage loans | Current    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 15,204.1 16,409.8
Residential mortgage loans    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 5,282.4 4,694.2
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 5,302.3 4,697.9
Mortgage loans, Recorded investment 90 days or more past due and accruing, Excludes unallocated basis adjustments 6.6 12.1
Residential mortgage loans | 30 to 59 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 21.8 64.8
Residential mortgage loans | 60 to 89 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 2.8 20.3
Residential mortgage loans | 90 Days or More Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 15.0 26.3
Residential mortgage loans | Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 39.6 111.4
Residential mortgage loans | Current    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 5,262.7 4,586.5
Other loans    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 84.2 185.9
Mortgage loans and direct financing leases and other loans, Recorded investment 90 days or more past due and accruing 1.7 2.0
Other loans | 30 to 59 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 1.6 2.3
Other loans | 60 to 89 Days Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 1.7 1.5
Other loans | 90 Days or More Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 9.3 8.4
Other loans | Past Due    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost 12.6 12.2
Other loans | Current    
Financing receivables, non-accrual and aging disclosures    
Mortgage loans and Other loans, Total amortized cost $ 71.6 $ 173.7