Financial Services, Insurance (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Insurance [Abstract]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change	$ 722.4	$ 661.0	$ 688.6	$ 669.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance	744.5	637.9	$ 728.9	$ 599.8
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change	0.0	0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience	0.7	12.5
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change	729.6	612.3
Liability for Future Policy Benefit, Expected Net Premium, Issuance	31.8	41.6
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	7.0	5.1
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	(23.9)	(21.1)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax	$ (22.1)	$ 23.1