Derivatives and Financial Instruments - Additional Information (Detail) € in Millions, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2011 USD ($)	Sep. 26, 2015 USD ($)	Sep. 27, 2014 USD ($)	Sep. 26, 2015 USD ($)	Sep. 27, 2014 USD ($)	Dec. 31, 2014 USD ($)	Sep. 26, 2015 EUR (€)
Derivative [Line Items]
Discontinued Operation, Provision for Loss (Gain) on Disposal, Net of Tax		$ 0.0	$ 380.1	$ 4.8	$ 385.7
Debt, Long-term and Short-term, Combined Amount		4,986.4		4,986.4
Discontinued Operation, Tax (Expense) Benefit from Provision for (Gain) Loss on Disposal		0.0	$ 12.3	$ 0.0	$ 14.7
Description of Net Investment Hedge Activity				500
Gain (Loss) on Derivative Used in Net Investment Hedge, Net of Tax				$ 5.5
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount		235.1		235.1		$ 250.8
Interest Rate Swap [Member]
Derivative [Line Items]
Average swap interest rate	3.65%
Cost of expiration (termination)	$ 11.0
Derivative instrument contractual life	10 years
Unrealized loss				6.1		7.0
Derivative, Notional Amount	$ 400.0
Senior Notes [Member] | Senior Notes 2.45% Due 2019
Derivative [Line Items]
Debt, Long-term and Short-term, Combined Amount		$ 559.3		$ 559.3		$ 0.0	€ 500.0