Employee Retirement Plans and Postretirement Benefits Changes Recognized Pre-tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Accumulated other comprehensive loss (income), at the beginning of the period	$ 500.7	$ 562.0
Amortization of prior service (costs) benefit	(0.4)	(0.5)
Amortization of net actuarial (loss) gain	3.7	(5.9)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	(2.0)	5.7
Settlement	(30.0)	(0.1)
Current year actuarial loss (gain)	45.9	(61.1)
Foreign currency exchange rate change	2.5	0.6
Accumulated other comprehensive loss (income), at the end of the period	520.4	500.7
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated other comprehensive loss (income), at the beginning of the period	698.0	646.9
Amortization of prior service (costs) benefit	(1.1)	(0.7)
Amortization of net actuarial (loss) gain	(10.4)	(7.6)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	(2.0)	9.8
Settlement	(29.8)	0.0
Current year actuarial loss (gain)	38.5	46.8
Foreign currency exchange rate change	(0.4)	2.8
Accumulated other comprehensive loss (income), at the end of the period	692.8	698.0
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated other comprehensive loss (income), at the beginning of the period	(197.3)	(84.9)
Amortization of prior service (costs) benefit	0.7	0.2
Amortization of net actuarial (loss) gain	14.1	1.7
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0.0	(4.1)
Settlement	(0.2)	(0.1)
Current year actuarial loss (gain)	7.4	(107.9)
Foreign currency exchange rate change	2.9	(2.2)
Accumulated other comprehensive loss (income), at the end of the period	$ (172.4)	$ (197.3)