Pension and Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Apr. 03, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Transfer of pension plan asset to life insurance company					$ 100.0
transfer of pension plan obligation to Life Insurance company					$ 105.6
non-cash pension settlement loss	$ 60.6	$ 0.0	$ 60.6	$ 0.0
Reclassification pension benefit obligations to AOCL	5.6
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1.2	1.3
Interest cost	1.9	3.1
Expected return on plan assets	(2.5)	(4.7)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.1	0.1
Recognized actuarial loss	0.9	2.3
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	(60.6)	0.0
Net periodic benefit cost	62.2	2.1
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	2.4	2.7
Interest cost	5.4	6.2
Expected return on plan assets	(7.2)	(9.4)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.1	0.1
Recognized actuarial loss	2.9	4.6
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	(60.6)	0.0
Net periodic benefit cost	$ 64.2	$ 4.2