CONSOLIDATED STATEMENT OF CASH FLOW (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 82.0	$ 37.6	$ 60.8	$ 89.4
Adjustments to reconcile net income to net cash from operating activities:
Amortization and depreciation			156.4	122.0
Income taxes			(31.4)	27.2
Insurance liabilities			123.1	329.1
Accrual and amortization of investment income			66.0	(130.9)
Deferral of policy acquisition costs			(132.4)	(143.0)
Net realized investment (gains) losses			71.7	(21.4)
Loss on extinguishment of debt	$ 0.0	$ 7.3	0.0	7.3
Other			10.8	38.0
Net cash from operating activities			325.0	317.7
Amounts related to employee benefit plans			$ 10.1	$ 10.4