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Business Combinations - Summary of Estimated Fair Value of Assets and Liabilities (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
Oct. 27, 2014
Business Combinations [Abstract]  
Accounts receivable estimated fair value $ 424.4us-gaap_BusinessCombinationAcquiredReceivablesFairValue
Gross contractual value $ 445.2us-gaap_BusinessCombinationAcquiredReceivablesGrossContractualAmount