Other Income (Expense), net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Significant components of Other (expense) income, net
Other income (expense), net	$ 1.2	$ (3.6)	$ 10.8
Investment income from life insurance policies
Significant components of Other (expense) income, net
Other income (expense), net	60.8	55.3	51.3
Interest expense on life insurance policy loans
Significant components of Other (expense) income, net
Other income (expense), net	(62.1)	(57.4)	(52.5)
Gain on acquisition achieved in stages
Significant components of Other (expense) income, net
Other income (expense), net			11.4
Life insurance policy cost of insurance
Significant components of Other (expense) income, net
Other income (expense), net	(10.9)	(10.1)	(9.2)
Income from life insurance policy redemptions
Significant components of Other (expense) income, net
Other income (expense), net	4.4	4.2
Foreign currency transaction gains
Significant components of Other (expense) income, net
Other income (expense), net	1.8		3.1
Rental income
Significant components of Other (expense) income, net
Other income (expense), net	2.3	1.9	1.9
Interest income
Significant components of Other (expense) income, net
Other income (expense), net	1.0	1.0	1.4
Equity in earnings of unconsolidated entities
Significant components of Other (expense) income, net
Other income (expense), net	0.7		2.2
All other, net
Significant components of Other (expense) income, net
Other income (expense), net	$ 3.2	$ 1.5	$ 1.2