Other Expense, net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Significant components of Other Expense, net
Other expense, net	$ 0.7	$ 4.7	$ 4.0
Investment income from life insurance policies
Significant components of Other Expense, net
Other expense, net	(67.4)	(66.4)	(60.8)
Interest expense on life insurance policy loans
Significant components of Other Expense, net
Other expense, net	70.1	66.5	62.1
Life insurance policy cost of insurance
Significant components of Other Expense, net
Other expense, net	12.1	11.5	10.9
Income from life insurance policy redemptions
Significant components of Other Expense, net
Other expense, net	(10.3)	(8.5)	(4.4)
Foreign currency transaction (gains) losses
Significant components of Other Expense, net
Other expense, net	(0.6)	4.9	(1.8)
Net periodic benefit cost - components other than service cost
Significant components of Other Expense, net
Other expense, net	2.1	6.9	5.2
All other, net
Significant components of Other Expense, net
Other expense, net	$ (5.3)	$ (10.2)	$ (7.2)