Stockholders' Equity - Schedule of Amounts Reclassified Out of Other Comprehensive Earnings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Revenues	$ 747,685	$ 726,211	$ 2,237,693	$ 2,172,967
Earnings before taxes	143,762	155,773	414,275	450,319
Reclassification Out of Other Comprehensive Earnings
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Earnings before taxes	(818)	1,264	(699)	751
Reclassification Out of Other Comprehensive Earnings | Net Unrealized Gains (Losses) Defined benefit pension and post-retirement benefit plans
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cost of Revenues & Operating Expenses	(579)	(736)	(1,737)	(2,211)
Reclassification Out of Other Comprehensive Earnings | Net Unrealized Gains (Losses) Cash Flow Hedging Instruments
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Revenues	$ (239)	$ 2,000	$ 1,038	$ 2,962