Share-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Mar. 29, 2013	Mar. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 13,200	$ 14,600	$ 23,400	$ 25,100
Taxes on earnings	(4,009)	(4,707)	(7,178)	(8,048)
Net decrease in net earnings	9,219	9,931	16,213	17,091
Cost of revenues - Product
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,274	1,247	2,385	2,244
Cost of revenues - Service contracts and other
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,098	405	1,461	867
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,487	1,727	3,226	3,259
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 9,369	$ 11,259	$ 16,319	$ 18,769