Fair Value of Other Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Sep. 28, 2012	Sep. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank deposits (included in "Cash and cash equivalents")	$ 660.0	$ 564.3
Short-term borrowings	(155.0)	(181.4)
Long-term debt	(6.8)	(17.2)
Quoted Prices in Active Markets for Identical Instruments (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank deposits (included in "Cash and cash equivalents")	660.0	564.3
Short-term borrowings	0	0
Long-term debt	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank deposits (included in "Cash and cash equivalents")	0	0
Short-term borrowings	(155.0)	(181.4)
Long-term debt	(6.8)	(17.2)
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank deposits (included in "Cash and cash equivalents")	0	0
Short-term borrowings	0	0
Long-term debt	$ 0	$ 0