v3.25.1
Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Accumulated Other Comprehensive Loss    
Balance at Beginning of Period $ (2,523.7) $ (3,308.0)
Other Comprehensive Income (Loss) Before Reclassifications 187.3 356.8
Amounts Reclassified from AOCI (157.6) (11.2)
Total Other Comprehensive Income 344.9 368.0
Balance at End of Period (2,178.8) (2,940.0)
Net Unrealized Loss on Securities    
Accumulated Other Comprehensive Loss    
Balance at Beginning of Period (2,755.2) (1,919.1)
Other Comprehensive Income (Loss) Before Reclassifications 265.6 (454.1)
Amounts Reclassified from AOCI (156.4) (12.4)
Total Other Comprehensive Income 422.0 (441.7)
Balance at End of Period (2,333.2) (2,360.8)
Effect of Change in Discount Rate Assumptions on the LFPB1    
Accumulated Other Comprehensive Loss    
Balance at Beginning of Period 1,185.4 (648.4)
Other Comprehensive Income (Loss) Before Reclassifications (166.3) 873.7
Amounts Reclassified from AOCI 0.0 0.0
Total Other Comprehensive Income (166.3) 873.7
Balance at End of Period 1,019.1 225.3
Net Loss on Derivatives    
Accumulated Other Comprehensive Loss    
Balance at Beginning of Period (270.7) (73.7)
Other Comprehensive Income (Loss) Before Reclassifications 47.5 (48.9)
Amounts Reclassified from AOCI 2.0 4.4
Total Other Comprehensive Income 45.5 (53.3)
Balance at End of Period (225.2) (127.0)
Foreign Currency Translation Adjustment    
Accumulated Other Comprehensive Loss    
Balance at Beginning of Period (343.0) (321.1)
Other Comprehensive Income (Loss) Before Reclassifications 42.3 (11.5)
Amounts Reclassified from AOCI 0.0 0.0
Total Other Comprehensive Income 42.3 (11.5)
Balance at End of Period (300.7) (332.6)
Unrecognized Pension and Postretirement Benefit Costs    
Accumulated Other Comprehensive Loss    
Balance at Beginning of Period (340.2) (345.7)
Other Comprehensive Income (Loss) Before Reclassifications (1.8) (2.4)
Amounts Reclassified from AOCI (3.2) (3.2)
Total Other Comprehensive Income 1.4 0.8
Balance at End of Period $ (338.8) $ (344.9)