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Other Required Disclosures - Summarization of Remaining Accrual Balance Associated with Initiatives and Activity (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Dec. 30, 2012
Restructuring Cost and Reserve [Line Items]  
Accrual Balance $ 6.6
Provisions 3.9
Cash Expenditures (2.0)
Accrual Balance 8.5
Expensed as Incurred 2.7
Global Cost Reduction Initiatives [Member]
  
Restructuring Cost and Reserve [Line Items]  
Accrual Balance 4.4
Provisions 3.9
Cash Expenditures (1.8)
Accrual Balance 6.5
Expensed as Incurred 2.6
Termination benefits [Member]
  
Restructuring Cost and Reserve [Line Items]  
Accrual Balance 3.3
Provisions 3.8
Cash Expenditures (1.5)
Accrual Balance 5.6
Expensed as Incurred 0.2
Other costs [Member]
  
Restructuring Cost and Reserve [Line Items]  
Accrual Balance 1.1
Provisions 0.1
Cash Expenditures (0.3)
Accrual Balance 0.9
Expensed as Incurred 2.4
Other initiatives [Member]
  
Restructuring Cost and Reserve [Line Items]  
Accrual Balance 2.2
Cash Expenditures (0.2)
Accrual Balance 2.0
Expensed as Incurred $ 0.1