Assets Acquired and Liabilities Assumed at Acquisition Date Based upon Respective Estimated Fair Values (Parenthetical) (Detail) (Eusa Pharma, USD $) In Millions, unless otherwise specified	Jun. 12, 2012
Eusa Pharma
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Estimated fair value of trade receivables acquired	$ 23.4
Gross contractual amount of trade receivables	25.1
Estimated uncollectible amount of trade receivable	$ 1.7

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the best estimate at the acquisition date of the contractual cash flows not expected to be collected, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the fair value of the receivables acquired, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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- Definition

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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