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Subsequent Events - Estimated Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Oct. 27, 2014 Subsequent Event [Member] Independence Oilfield Chemicals LLC [Member]
Business Acquisition [Line Items]
Other intangible assets					$ 78.7
Goodwill	187.9	187.9	165.3	149.0	115.8
Other net assets acquired					18.3
Purchase price, net of cash acquired					$ 212.8

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- Definition

Business acquisition purchase price allocation other net assets.

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

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-Publisher FASB

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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