Venezuela Currency Remeasurement - Narrative (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended			36 Months Ended								3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2013 Devaluation Of Venezuelan Bolivar	Dec. 31, 2013 Devaluation Of Venezuelan Bolivar	Dec. 31, 2012 Devaluation Of Venezuelan Bolivar	Dec. 31, 2011 Devaluation Of Venezuelan Bolivar	Dec. 31, 2010 Devaluation Of Venezuelan Bolivar	Sep. 30, 2014 Devaluation Of Venezuelan Bolivar	Feb. 08, 2013 Devaluation Of Venezuelan Bolivar	Sep. 30, 2014 Devaluation Of Venezuelan Bolivar SICAD 1	Sep. 30, 2014 Devaluation Of Venezuelan Bolivar SICAD 2	Sep. 30, 2014 Devaluation Of Venezuelan Bolivar SICAD 1 and 2	Sep. 30, 2014 Devaluation Of Venezuelan Bolivar SICAD 1 and 2	Sep. 30, 2014 Devaluation Of Venezuelan Bolivar Noncontrolling Interest	Sep. 30, 2013 Devaluation Of Venezuelan Bolivar Noncontrolling Interest	Sep. 30, 2014 Devaluation Of Venezuelan Bolivar Noncontrolling Interest SICAD 1 and 2	Feb. 07, 2013 Devaluation Of Venezuelan Bolivar Before Rate Change	Feb. 08, 2013 Devaluation Of Venezuelan Bolivar After Rate Change
Maximum three year cumulative inflation using the blended Consumer Price Index and National Consumer Price Index				100.00%	100.00%	100.00%	100.00%
Foreign currency exchange rate										11.7	50.0						4.3	6.3
Gain (loss) on foreign currency transaction and translation, pre-tax	$ (18.0)	$ (3.2)	$ (3.2)									$ 0.6	$ (18.0)	$ 0.4	$ (1.0)	$ (6.0)
Gain (loss) on foreign currency transaction and translation, after tax			$ (2.0)										$ (14.0)
Percentage of foreign currency devaluation									32.00%
Joint venture, ownership percentage								50.10%