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Financial Instruments Financial Instruments - Foreign Currency Exchange Rate Risk and Concentration of Credit Risk (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Entity	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Concentration Risk, Percentage	98.00%us-gaap_ConcentrationRiskPercentage1
Sales Revenue, Goods, Net [Member]
Derivative [Line Items]
Number of customers	3
Concentration Risk, Percentage	26.20%	28.20%	28.20%
Accounts Receivable [Member]
Derivative [Line Items]
Concentration Risk, Percentage	12.50%	14.00%
Accumulated Translation Adjustment [Member]
Derivative [Line Items]
Foreign currency (losses) gains of net investment hedges included in accumulated other comprehensive loss, net of deferred tax benefit	37.4	(12.2)	(9.2)

Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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