v3.26.1
Investments - Financing Receivable, Non-Accrual and Aging (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Financing receivables, non-accrual and aging disclosures      
Financing receivables, Non-accrual status $ 228.1 $ 84.7 $ 86.1
Financing receivables, Non-accrual assets without a valuation allowance 63.6 13.4  
Direct financing leases, Total amortized cost 555.0 576.5  
Mortgage loans and direct financing leases and other loans, Total amortized cost 21,948.3 21,978.4  
Mortgage loans and direct financing leases and other loans, Recorded investment 90 days or more past due and accruing 19.0 56.7  
Reinsurance recoverable and deposit receivable 18,592.2 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 85.0 76.9  
60 to 89 Days Past Due      
Financing receivables, non-accrual and aging disclosures      
Direct financing leases, Total amortized cost 0.9 0.9  
Mortgage loans and direct financing leases and other loans, Total amortized cost 27.0 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 98.3 135.7  
Past Due      
Financing receivables, non-accrual and aging disclosures      
Direct financing leases, Total amortized cost 0.9 4.8  
Mortgage loans and direct financing leases and other loans, Total amortized cost 210.3 236.7  
Reinsurance recoverable and deposit receivable 0.0 0.0  
Current      
Financing receivables, non-accrual and aging disclosures      
Direct financing leases, Total amortized cost 554.1 571.7  
Mortgage loans and direct financing leases and other loans, Total amortized cost 21,738.0 21,741.7  
Commercial mortgage loans      
Financing receivables, non-accrual and aging disclosures      
Financing receivables, Non-accrual status 195.6 58.4 70.5
Financing receivables, Non-accrual assets without a valuation allowance 42.0    
Mortgage loans and Other loans, Total amortized cost 16,100.2 16,518.1  
Mortgage loans, Recorded investment 90 days or more past due and accruing 0.1 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 11.6 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 5.9 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 51.7 101.0  
Commercial mortgage loans | Past Due      
Financing receivables, non-accrual and aging disclosures      
Mortgage loans and Other loans, Total amortized cost 69.2 108.3  
Commercial mortgage loans | Current      
Financing receivables, non-accrual and aging disclosures      
Mortgage loans and Other loans, Total amortized cost 16,031.0 16,409.8  
Residential mortgage loans      
Financing receivables, non-accrual and aging disclosures      
Financing receivables, Non-accrual status 20.6 19.9 $ 15.6
Financing receivables, Non-accrual assets without a valuation allowance 9.7 7.0  
Mortgage loans and Other loans, Total amortized cost 5,176.6 4,694.2  
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 5,183.5 4,697.9  
Mortgage loans, Recorded investment 90 days or more past due and accruing, Excludes unallocated basis adjustments 16.5 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 71.6 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 18.2 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 32.3 26.3  
Residential mortgage loans | Past Due      
Financing receivables, non-accrual and aging disclosures      
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 122.1 111.4  
Residential mortgage loans | Current      
Financing receivables, non-accrual and aging disclosures      
Mortgage loans, Total amortized cost, Excludes unallocated basis adjustments 5,061.4 4,586.5  
Other loans      
Financing receivables, non-accrual and aging disclosures      
Financing receivables, Non-accrual status 11.9 6.4  
Financing receivables, Non-accrual assets without a valuation allowance 11.9 6.4  
Mortgage loans and Other loans, Total amortized cost 109.6 185.9  
Mortgage loans and direct financing leases and other loans, Recorded investment 90 days or more past due and accruing 2.4 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 1.8 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 2.0 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 14.3 8.4  
Other loans | Past Due      
Financing receivables, non-accrual and aging disclosures      
Mortgage loans and Other loans, Total amortized cost 18.1 12.2  
Other loans | Current      
Financing receivables, non-accrual and aging disclosures      
Mortgage loans and Other loans, Total amortized cost $ 91.5 $ 173.7