STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Other Comprehensive Income (Loss)
Change in Net Unrealized Gain on Securities After Adjustment, Tax Expense (Benefit)	$ 22.0	$ (98.0)	$ 132.2	$ (217.2)
OCI, Liability for Future Policy Benefit, Gain (Loss), after REclassification Adjustment, Tax	10.9	130.8	(31.7)	364.9
Change in Net Gain on Hedges, Tax Benefit	15.9	9.0	4.2	23.1
Change in Foreign Currency Translation Adjustment, Tax Expense	(0.4)	(1.2)	(0.2)	(1.5)
Change in Unrecognized Pension and Postretirement Benefit costs, Tax Expense	$ 0.5	$ (0.7)	$ 0.7	$ (10.1)