Pension and Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Apr. 03, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
transfer of pension plan obligation to Life Insurance company					$ 105.6
non-cash pension settlement loss	$ 0.0	$ 0.0	$ 60.6	$ 0.0
Reclassification pension benefit obligations to AOCL	5.6
Transfer of pension plan asset to life insurance company					$ 100.0
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1.2	1.3
Interest cost	2.7	3.1
Expected return on plan assets	(3.6)	(4.7)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.1	0.1
Recognized actuarial loss	1.4	2.3
Defined Benefit Plan, Other Cost (Credit)	0.0	0.3		0.3
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0.0	0.0
Net periodic benefit cost	$ 1.8	$ 2.4
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost			3.6	4.0
Interest cost			8.1	9.3
Expected return on plan assets			(10.8)	(14.1)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)			0.1	0.1
Recognized actuarial loss			4.3	6.9
Defined Benefit Plan, Other Cost (Credit)			0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment			(60.6)	0.0
Net periodic benefit cost			$ 65.9	$ 6.5