Pension and Other Post-Retirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in Fair Value of Plan Assets
Plan assets at beginning of year	$ 456.9
Company contributions	1.9	$ 1.8	$ 1.6
Plan assets at end of year	416.1	456.9
Amount Recognized
Other liabilities	(94.6)	(86.6)
Accumulative other comprehensive loss:
After-tax amount recognized in accumulated other comprehensive loss	99.9	107.7	78.2	$ 131.1
Defined Benefit Pension [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	502.7	442.7
Service cost	7.4	5.9	6.7
Interest cost	19.6	20.7	18.4
Actuarial loss	22.6	(67.0)
Benefits paid	(36.9)	(31.2)
Effect of foreign exchange rate changes	(2.5)	(2.4)
Benefit obligation at end of year	475.0	502.7	442.7
Change in Fair Value of Plan Assets
Plan assets at beginning of year	456.9	447.8
Actual return on plan assets	(4.6)	40.3
Effect of exchange rate changes	(2.2)	(2.4)
Company contributions	2.9	2.4
Benefits paid	(36.9)	(31.2)
Plan assets at end of year	416.1	456.9	447.8
Funded Status at end of year	(58.9)	(45.8)
Amount Recognized
Other liabilities	(58.9)	(45.8)
Accumulative other comprehensive loss:
Net actuarial loss	163.3	170.9
Prior service credit (cost)	(1.1)	(2.1)
Accumulated other comprehensive loss	162.2	168.8
After-tax amount recognized in accumulated other comprehensive loss	101.3	105.4
Retiree Health and Life [Member]
Change in Benefit Obligation
Benefit obligation at beginning of year	40.8	40.4
Service cost	0.2	0.1	0.2
Interest cost	1.3	1.6	1.6
Actuarial loss	3.6	(2.6)
Benefits paid	(2.9)	(3.9)
Effect of foreign exchange rate changes	0.0	0.0
Benefit obligation at end of year	35.0	40.8	40.4
Change in Fair Value of Plan Assets
Plan assets at beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Effect of exchange rate changes	0.0	0.0
Company contributions	2.9	3.9
Benefits paid	(2.9)	(3.9)
Plan assets at end of year	0.0	0.0	$ 0.0
Funded Status at end of year	(35.0)	(40.8)
Amount Recognized
Other liabilities	(35.0)	(40.8)
Accumulative other comprehensive loss:
Net actuarial loss	(0.2)	3.3
Prior service credit (cost)	(2.0)	0.4
Accumulated other comprehensive loss	(2.2)	3.7
After-tax amount recognized in accumulated other comprehensive loss	$ (1.4)	$ 2.3