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Accumulated Other Comprehensive Earnings - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract]
Expense related to pension liability reclassified from accumulated other comprehensive loss	$ 7.9	$ 7.2	$ 1.6
Income (expense) related to fair value of derivative investments reclassified from accumulated other comprehensive loss	0.9	0.2	(0.4)
Foreign currency translation reclassified from accumulated other comprehensive loss	$ 0	$ 0	$ 0

Amount before tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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