Benefit Plans and Other Postretirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in plan assets:
Employer contributions	$ 24.1	$ 23.8
Pension Benefits
Change in projected benefit obligation:
Benefit obligation at beginning of year	676.5	560.1
Service cost	12.5	10.8
Interest cost	22.8	24.1	$ 20.9
Acquisitions	1.2	7.0
Plan amendments	0.4
Actuarial (gain) loss	(19.0)	123.1
Foreign exchange translation	(18.2)	(18.7)
Benefits paid	(31.2)	(29.9)
Benefit obligation at end of year	645.0	676.5	560.1
Change in plan assets:
Fair value of plan assets at the beginning of the year	409.4	392.5
Actual return on plan assets	(3.7)	27.7
Employer contributions	24.1	23.8	23.3
Foreign exchange translation	(6.4)	(4.7)
Benefits paid	(31.2)	(29.9)
Fair value of plan assets at end of year	392.2	409.4	392.5
Funded status	(252.8)	(267.1)
Accumulated benefit obligation	624.5	653.7
Summary of the defined benefit pension plans and other post-retirement benefits
Service cost	9.3	8.2	8.5
Interest cost	22.8	24.1	20.9
Expected return on plan assets	(29.1)	(28.5)	(24.8)
Net amortization of actuarial losses	28.0	18.6	25.5
Net pension expense	31.0	22.4	30.1
International Plans
Change in projected benefit obligation:
Benefit obligation at beginning of year	86.0
Benefit obligation at end of year	76.2	86.0
Contribution required to be made during 2016, included in other accrued expenses	7.2
Other Postretirement Benefits
Change in projected benefit obligation:
Benefit obligation at beginning of year	12.2	11.9
Service cost	0.1	0.1
Interest cost	0.4	0.5	0.5
Actuarial (gain) loss	1.7	0.6
Benefits paid	(1.2)	(0.9)
Benefit obligation at end of year	13.2	12.2	11.9
Change in plan assets:
Benefits paid	(1.2)	(0.9)
Summary of the defined benefit pension plans and other post-retirement benefits
Service cost	0.1	0.1	0.2
Interest cost	0.4	0.5	0.5
Net amortization of actuarial losses	0.3	0.4	0.8
Net pension expense	$ 0.8	$ 1.0	$ 1.5