CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 253.5	$ 153.0
Other Comprehensive Income (Loss)
Change in Net Unrealized Gain on Securities Before Adjustment (net of tax benefit of $775.1; $434.2)	(2,893.8)	(1,646.0)
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance (net of tax expense of $536.9; $331.8)	1,997.7	1,256.5
Change in Net Gain on Hedges (net of tax benefit of $2.9; $5.4)	(10.4)	(20.7)
Change in Foreign Currency Translation Adjustment (net of tax expense of $0.8; $1.8)	(31.9)	7.3
Change in Unrecognized Pension and Postretirement Benefit Costs (net of tax expense of $0.9; $1.2)	(4.2)	(3.8)
Total Other Comprehensive Loss	(934.2)	(399.1)
Comprehensive Loss	$ (680.7)	$ (246.1)