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Receivables (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 12 Months Ended
Mar. 31, 2014
May 03, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Credit settlement amount   $ 44.2
Estimated redemptions as receivable 33.6  
Customers activated in credit   $ 21.5