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Other Required Disclosures - Components of Receivables, Net (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 30, 2012
Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Trade accounts receivable $ 505.4 $ 357.2
Contingent purchase price reduction receivable 41.0 41.0
Other receivables 44.5 38.1
Total receivables 590.9 436.3
Less: Allowance for doubtful trade accounts receivable 24.2 21.9
Total receivables, net $ 566.7 $ 414.4