Benefit Plans and Other Postretirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the balance sheet as of December 31:
Accrued pension and postretirement benefit obligations	$ 288.4	$ 262.5
Accumulated other comprehensive loss, net	(469.0)	(349.5)
Pension Benefits
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	645.0	676.5
Service cost	13.4	12.5
Interest cost	20.9	22.8	$ 24.1
Acquisitions	51.4	1.2
Plan amendments	3.7	0.4
Actuarial (gain) loss	39.6	(19.0)
Foreign exchange translation	(17.6)	(18.2)
Benefits paid	(39.2)	(31.2)
Projected benefit obligation at end of year	717.2	645.0	676.5
Change in plan assets:
Fair value of plan assets at the beginning of the year	392.2	409.4
Actual return on plan assets	31.8	(3.7)
Employer contributions	26.2	24.1	23.8
Acquisitions	36.7
Foreign exchange translation	(7.8)	(6.4)
Benefits paid	(39.2)	(31.2)
Fair value of plan assets at end of year	439.9	392.2	409.4
Underfunded status at end of year	277.3	252.8
Amounts recognized in the balance sheet as of December 31:
Other accrued expenses	5.8	6.1
Accrued pension and postretirement benefit obligations	271.5	246.7
Underfunded status at end of year	277.3	252.8
Accumulated other comprehensive loss, net	(191.8)	(179.4)
Accumulated benefit obligation
Accumulated benefit obligation	691.1	624.5
Components of net pension expense:
Service cost	9.0	9.3	8.2
Interest cost	20.9	22.8	24.1
Expected return on plan assets	(30.1)	(29.1)	(28.5)
Amortization of prior service cost	2.4	2.3	2.7
Amortization of actuarial losses	22.0	25.7	15.9
Net pension expense	24.2	31.0	22.4
U.S. plans, Pension Benefits
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	460.8	472.2
Service cost	6.2	6.5
Interest cost	15.4	17.4	17.3
Plan amendments	3.7	0.4
Actuarial (gain) loss	11.6	(12.6)
Benefits paid	(27.9)	(23.1)
Projected benefit obligation at end of year	469.8	460.8	472.2
Change in plan assets:
Fair value of plan assets at the beginning of the year	333.2	346.1
Actual return on plan assets	20.4	(5.5)
Employer contributions	16.4	15.7
Benefits paid	(27.9)	(23.1)
Fair value of plan assets at end of year	342.1	333.2	346.1
Underfunded status at end of year	127.7	127.6
Amounts recognized in the balance sheet as of December 31:
Accrued pension and postretirement benefit obligations	127.7	127.6
Underfunded status at end of year	127.7	127.6
Accumulated other comprehensive loss, net	$ (129.3)	$ (129.1)
Weighted average assumptions used to determine projected benefit obligations:
Benefit obligation discount rate (as a percent)	3.93%	4.11%
Rate of compensation increase (as a percent)	3.00%	3.00%
Accumulated benefit obligation
Accumulated benefit obligation	$ 465.8	$ 456.1
Components of net pension expense:
Service cost	6.2	6.5	5.1
Interest cost	15.4	17.4	17.3
Expected return on plan assets	(26.2)	(25.9)	(24.8)
Amortization of prior service cost	2.4	2.3	2.7
Amortization of actuarial losses	18.6	21.5	13.3
Net pension expense	$ 16.4	$ 21.8	$ 13.6
Weighted average assumptions used to determine net periodic benefit cost/expense:
Discount rate (as a percent)	4.11%	3.75%	4.60%
Expected long-term return on assets (as a percent)	7.75%	8.00%	8.00%
Rate of compensation increase (as a percent)	3.00%	3.00%	3.00%
Increase (decrease) in benefit obligation due to change in discount rate	$ 10.7
International Plans
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	184.2	$ 204.3
Service cost	7.2	6.0
Interest cost	5.5	5.4	$ 6.8
Acquisitions	51.4	1.2
Actuarial (gain) loss	28.0	(6.4)
Foreign exchange translation	(17.6)	(18.2)
Benefits paid	(11.3)	(8.1)
Projected benefit obligation at end of year	247.4	184.2	204.3
Change in plan assets:
Fair value of plan assets at the beginning of the year	59.0	63.3
Actual return on plan assets	11.4	1.8
Employer contributions	9.8	8.4
Acquisitions	36.7
Foreign exchange translation	(7.8)	(6.4)
Benefits paid	(11.3)	(8.1)
Fair value of plan assets at end of year	97.8	59.0	63.3
Underfunded status at end of year	149.6	125.2
Amounts recognized in the balance sheet as of December 31:
Other accrued expenses	5.8	6.1
Accrued pension and postretirement benefit obligations	143.8	119.1
Underfunded status at end of year	149.6	125.2
Accumulated other comprehensive loss, net	$ (62.5)	$ (50.3)
Weighted average assumptions used to determine projected benefit obligations:
Benefit obligation discount rate (as a percent)	2.28%	3.14%
Rate of compensation increase (as a percent)	1.63%	1.48%
Accumulated benefit obligation
Accumulated benefit obligation	$ 225.3	$ 168.4
Components of net pension expense:
Service cost	2.8	2.8	3.1
Interest cost	5.5	5.4	6.8
Expected return on plan assets	(3.9)	(3.2)	(3.7)
Amortization of actuarial losses	3.4	4.2	2.6
Net pension expense	$ 7.8	$ 9.2	$ 8.8
Weighted average assumptions used to determine net periodic benefit cost/expense:
Discount rate (as a percent)	2.96%	2.91%	4.09%
Expected long-term return on assets (as a percent)	4.29%	5.47%	5.99%
Rate of compensation increase (as a percent)	1.61%	1.45%	1.48%
Largest International Plan
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 76.2
Projected benefit obligation at end of year	81.7	$ 76.2
Other Postretirement Benefits
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	13.2	12.2
Service cost		0.1
Interest cost	0.4	0.4	$ 0.5
Actuarial (gain) loss	0.9	1.7
Benefits paid	(0.9)	(1.2)
Projected benefit obligation at end of year	13.6	13.2	12.2
Change in plan assets:
Benefits paid	(0.9)	(1.2)
Underfunded status at end of year	13.6	13.2
Amounts recognized in the balance sheet as of December 31:
Other accrued expenses	1.2	1.1
Accrued pension and postretirement benefit obligations	12.4	12.1
Underfunded status at end of year	13.6	13.2
Accumulated other comprehensive loss, net	$ (3.6)	$ (3.5)
Weighted average assumptions used to determine projected benefit obligations:
Benefit obligation discount rate (as a percent)	3.65%	3.71%
Components of net pension expense:
Service cost		$ 0.1	0.1
Interest cost	$ 0.4	0.4	0.5
Amortization of actuarial losses	0.7	0.3	0.4
Net pension expense	$ 1.1	$ 0.8	$ 1.0
Weighted average assumptions used to determine net periodic benefit cost/expense:
Discount rate (as a percent)	3.71%	3.50%	4.15%