Business Combination (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	May 09, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Combination, Consideration Transferred [Abstract]
Acquisition and integration related cost		$ 8.0	$ 11.8	$ 19.1
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill		778.7	781.2	770.9
Preliminary Allocation Previously Reported [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable				235.7
Inventories				157.3
Other current assets				65.0
Mineral rights				535.5
Plant, property and equipment				371.2
Goodwill				708.1
Intangible assets				214.3
Other non-current assets				51.4
Total assets acquired				2,338.5
Accounts payable				66.4
Accrued expenses				61.6
Non-current deferred tax liability				322.3
Other non-current liabilities				85.9
Total liabilities assumed				536.2
Net assets acquired				1,802.3
Increase/(Decrease) [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable			0.0
Inventories			0.0
Other current assets			0.0
Mineral rights			0.0
Plant, property and equipment			0.0
Goodwill			12.8
Intangible assets			8.8
Other non-current assets			9.2
Total assets acquired			30.8
Accounts payable			0.0
Accrued expenses			0.0
Non-current deferred tax liability			1.5
Other non-current liabilities			29.3
Total liabilities assumed			30.8
Net assets acquired			0.0
Final Allocation [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable			235.7
Inventories			157.3
Other current assets			65.0
Mineral rights			535.5
Plant, property and equipment			371.2
Goodwill			720.9
Intangible assets			223.1
Other non-current assets			60.6
Total assets acquired			2,369.3
Accounts payable			66.4
Accrued expenses			61.6
Non-current deferred tax liability			323.8
Other non-current liabilities			115.2
Total liabilities assumed			567.0
Net assets acquired			1,802.3
AMCOL International Corporation [Member]
Business Acquisition [Line Items]
Consideration received (in dollars per share)	$ 45.75
Debt instrument face amount	$ 1,560.0
Business Combination, Consideration Transferred [Abstract]
Cash consideration transferred to AMCOL shareholders	1,519.4
AMCOL notes repaid at close	325.6
Total consideration transferred to debt and equity holders	1,845.0
Cash acquired	42.7
Total consideration transferred to debt and equity holders, net of cash acquired	$ 1,802.3
Acquisition and integration related cost		8.0	$ 11.8	$ 19.1
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Deferred tax liability on increase of goodwill		$ 323.8
AMCOL International Corporation [Member] | Technology [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Acquisition of intangible assets with useful life		12 years
AMCOL International Corporation [Member] | Tradenames [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Acquisition of intangible assets with useful life		34 years