Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Benefit Plans [Abstract]
Employee vesting period for defined benefit plans	5 years
Employer Contributions [Abstract]
Percentage of employer contribution into the employers savings plan	3.00%
Maximum percentage of total benefit obligation for international pension plans	25.00%
Amounts recognized in Balance Sheet [Abstract]
Non-current liability	$ (147.3)	$ (141.8)
Amounts recognized in accumulated other comprehensive income [Abstract]
Amount recognized end of year	78.0	74.8
Accumulated benefit obligation	394.5	382.6
Changes in Plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Amortization of prior service credit (gain) loss	(5.2)	(6.3)
Total recognized in other comprehensive income	$ 3.2	$ (7.3)	$ 31.1
Weighted average assumptions used to determine net periodic benefit cost [Abstract]
Discount rate	3.88%	3.71%	4.39%
Expected return on plan assets	6.89%	6.89%	7.34%
Rate of compensation increase	3.03%	3.04%	3.08%
Weighted average assumptions used to determine benefit obligation [Abstract]
Discount rate	3.60%	3.89%	3.66%
Rate of compensation increase	2.96%	3.04%	3.05%
Actual return on pension assets	8.00%	1.00%	7.00%
Maximum health care cost trend rate	5.00%
Weighted average asset allocations [Abstract]
Weighted average asset allocation percentages, Total	100.00%	100.00%
Weighted average asset allocations value [Abstract]
Total value	$ 289.3	$ 282.5
Fair value of plan assets [Abstract]
Fair value of plan assets	$ 289.3	282.5
Estimated future benefit payments [Abstract]
Average rate of return on assets	9.00%
Company's contributions to employee voluntary savings and investment plan	$ 5.1	6.3	$ 2.9
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	237.3	231.6
Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	31.7	33.0
Significant Unobservable Inputs (Level 3) [Member]
Change in plan assets [Roll Forward]
Beginning fair value	17.9	26.6
Purchases, sales, settlements	0.0	0.0
Actual return on plan assets	3.0	(8.4)
Foreign exchange impact	(0.6)	(0.3)
Ending fair value	20.3	17.9	26.6
Fair value of plan assets [Abstract]
Fair value of plan assets	20.3	17.9
US Equities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	155.2	143.9
US Equities [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	155.0	143.7
US Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0.2	0.2
US Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0.0	0.0
Non-US Equities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	18.9	22.5
Non-US Equities [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	18.9	22.5
Non-US Equities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0.0	0.0
Non-US Equities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0.0	0.0
Corporate Debt Securities [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	94.7	98.0
Corporate Debt Securities [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	63.4	65.4
Corporate Debt Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	31.3	32.6
Corporate Debt Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	$ 0.0	$ 0.0
Equity Securities [Member]
Weighted average asset allocations [Abstract]
Weighted average asset allocation percentages, Total	60.20%	58.90%
Weighted average asset allocations value [Abstract]
Total value	$ 174.1	$ 166.4
Equity Securities [Member] | Minimum [Member]
Estimated future benefit payments [Abstract]
Target long-term investment portfolio mix	55.00%
Equity Securities [Member] | Maximum [Member]
Estimated future benefit payments [Abstract]
Target long-term investment portfolio mix	65.00%
Fixed Income Securities [Member]
Weighted average asset allocations [Abstract]
Weighted average asset allocation percentages, Total	32.70%	34.70%
Weighted average asset allocations value [Abstract]
Total value	$ 94.7	$ 98.0
Fixed Income Securities [Member] | Minimum [Member]
Estimated future benefit payments [Abstract]
Target long-term investment portfolio mix	30.00%
Fixed Income Securities [Member] | Maximum [Member]
Estimated future benefit payments [Abstract]
Target long-term investment portfolio mix	35.00%
Real Estate [Member]
Weighted average asset allocations [Abstract]
Weighted average asset allocation percentages, Total	0.70%	0.90%
Weighted average asset allocations value [Abstract]
Total value	$ 1.9	$ 2.5
Fair value of plan assets [Abstract]
Fair value of plan assets	1.9	2.5
Real Estate [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0.0	0.0
Real Estate [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0.0	0.0
Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	$ 1.9	$ 2.5
Other [Member]
Weighted average asset allocations [Abstract]
Weighted average asset allocation percentages, Total	6.40%	5.50%
Weighted average asset allocations value [Abstract]
Total value	$ 18.6	$ 15.6
Fair value of plan assets [Abstract]
Fair value of plan assets	$ 18.6	15.6
Other [Member] | Minimum [Member]
Estimated future benefit payments [Abstract]
Target long-term investment portfolio mix	0.00%
Other [Member] | Maximum [Member]
Estimated future benefit payments [Abstract]
Target long-term investment portfolio mix	15.00%
Other [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	$ 0.0	0.0
Other [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	0.2	0.2
Other [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	18.4	15.4
Pension Benefits [Member]
Change in benefit obligations [Roll Forward]
Beginning projected benefit obligation	416.6	433.8
Service cost	8.2	10.3	8.9
Interest cost	13.0	15.4	14.9
Actuarial (gain)/loss	21.2	(17.0)
Benefits paid	(18.3)	(19.5)
Settlements	(0.9)	0.0
Acquisition	0.0	0.0
Foreign exchange impact	(11.4)	(7.0)
Other	(0.5)	0.6
Ending projected benefit obligation	427.9	416.6	433.8
Change in plan assets [Roll Forward]
Beginning fair value	282.5	295.8
Actual return on plan assets	22.9	1.2
Employer contributions	10.5	10.0
Plan participants' contributions	0.4	0.5
Benefits paid	(18.3)	(19.5)
Settlements	(0.5)	0.0
Acquisition	0.0	0.0
Foreign exchange impact	(8.2)	(5.5)
Ending fair value	289.3	282.5	295.8
Funded status of the plan	(138.6)	(134.1)
Amounts recognized in Balance Sheet [Abstract]
Current liability	(0.8)	(0.9)
Non-current liability	(137.8)	(133.2)
Recognized liability	(138.6)	(134.1)
Amounts recognized in accumulated other comprehensive income [Abstract]
Net actuarial (gain) loss	82.1	80.3
Prior service cost	(0.1)	0.2
Amount recognized end of year	82.0	80.5
Changes in Plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Current year actuarial gain (loss)	(8.7)	0.5
Amortization of actuarial (gain) loss	6.8	7.7
Amortization of prior service credit (gain) loss	0.4	0.5
Total recognized in other comprehensive income	(1.5)	8.7
Components of net periodic benefit cost [Abstract]
Service cost	8.2	10.3	8.9
Interest cost	13.0	15.4	14.9
Expected return on plan assets	(18.6)	(19.7)	(19.4)
Amortization of prior service cost	0.6	0.8	1.0
Recognized net actuarial (gain)/loss	10.7	12.1	7.4
Settlement/curtailment loss	0.3	0.0	0.0
Net periodic benefit cost	14.2	18.9	12.8
Amounts that will be amortized from Accumulated other comprehensive income (loss) in next fiscal year [Abstract]
Amortization of prior service credit (gain) loss	0.1
Amortization of net (gain) loss	10.6
Total costs to be recognized	10.7
Fair value of plan assets [Abstract]
Expected company contribution to its benefit plans	12.2
Estimated future benefit payments [Abstract]
2017	20.2
2018	21.2
2019	22.4
2020	23.0
2021	23.2
2022-2026	123.8
Post-retirement Benefits [Member]
Change in benefit obligations [Roll Forward]
Beginning projected benefit obligation	9.3	10.1
Service cost	0.3	0.4	0.4
Interest cost	0.3	0.3	0.4
Actuarial (gain)/loss	(0.6)	(0.9)
Benefits paid	0.0	(0.4)
Settlements	0.0	0.0
Acquisition	0.0	0.0
Foreign exchange impact	0.0	(0.2)
Other	0.0	0.0
Ending projected benefit obligation	9.3	9.3	10.1
Change in plan assets [Roll Forward]
Beginning fair value	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	0.0	0.4
Plan participants' contributions	0.0	0.0
Benefits paid	0.0	(0.4)
Settlements	0.0	0.0
Acquisition	0.0	0.0
Foreign exchange impact	0.0	0.0
Ending fair value	0.0	0.0	0.0
Funded status of the plan	(9.3)	(9.3)
Amounts recognized in Balance Sheet [Abstract]
Current liability	(0.6)	(0.7)
Non-current liability	(8.7)	(8.6)
Recognized liability	(9.3)	(9.3)
Amounts recognized in accumulated other comprehensive income [Abstract]
Net actuarial (gain) loss	(1.7)	(1.5)
Prior service cost	(2.4)	(4.3)
Amount recognized end of year	(4.1)	(5.8)
Changes in Plan assets and benefit obligations recognized in other comprehensive income [Abstract]
Current year actuarial gain (loss)	0.3	0.6
Amortization of actuarial (gain) loss	(0.1)	(0.1)
Amortization of prior service credit (gain) loss	(1.9)	(1.9)
Total recognized in other comprehensive income	(1.7)	(1.4)
Components of net periodic benefit cost [Abstract]
Service cost	0.3	0.4	0.4
Interest cost	0.3	0.3	0.4
Expected return on plan assets	0.0	0.0	0.0
Amortization of prior service cost	(3.1)	(3.1)	(3.1)
Recognized net actuarial (gain)/loss	(0.2)	(0.1)	(0.2)
Settlement/curtailment loss	0.0	0.0	0.0
Net periodic benefit cost	(2.7)	(2.5)	(2.5)
Amounts that will be amortized from Accumulated other comprehensive income (loss) in next fiscal year [Abstract]
Amortization of prior service credit (gain) loss	(3.1)
Amortization of net (gain) loss	(0.3)
Total costs to be recognized	(3.4)
Fair value of plan assets [Abstract]
Expected company contribution to its benefit plans	0.6
Estimated future benefit payments [Abstract]
2017	0.6
2018	0.7
2019	0.7
2020	0.7
2021	0.8
2022-2026	4.0
U.S. Plans [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	221.9	213.0	224.1
International Plans [Member]
Fair value of plan assets [Abstract]
Fair value of plan assets	$ 67.4	$ 69.5	71.7
AMCOL 401(k) Plan [Member]
Estimated future benefit payments [Abstract]
Company's contributions to employee voluntary savings and investment plan			$ 2.6