Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2012 Distributor	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Fair Value, Measurements, Recurring Fair Value, Inputs, Level 3	Dec. 31, 2011 Fair Value, Measurements, Recurring Fair Value, Inputs, Level 3	Dec. 20, 2010 Interest rate swap contract
Derivative [Line Items]
Notional value of forward currency and option contracts	$ 205,200,000		$ 128,100,000	$ 205,200,000
Fixed-rate notes interest percentage								2.875%
Notional value of interest rate swap contract								250,000,000
Losses in accumulated other comprehensive loss in consolidated balance sheet that are expected to be reclassified into earnings			700,000
Fair value of contingent consideration						77,100,000	77,100,000
Fair value of commercial paper borrowings	304,500,000			304,500,000
Fair value of long-term debt	1,038,700,000		1,532,200,000	1,038,700,000
Write-down of Greece receivables recorded to other (income) expense, net					3,800,000
Greek bonds received in settlement of accounts receivable				16,800,000
Impairment charges for bonds	4,500,000	7,000,000		11,500,000
Percentage of sales to distributors accounted for company net sales			36.00%
Percentage of distributors' sale accounted by five largest distributors			65.00%
Percentage of net sales accounted by one large distributor			9.00%	9.00%	9.00%
Number of largest distributors accounting for distributors sales			5
Gross receivables from a distributor	$ 41,600,000		$ 40,900,000	$ 41,600,000