Stockholders' Equity - Schedule of Amounts Reclassified Out of Other Comprehensive Earnings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 03, 2015	Mar. 28, 2014	Apr. 03, 2015	Mar. 28, 2014
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Revenues	$ 759,406	$ 778,506	$ 1,497,260	$ 1,490,008
Reclassification Out of Other Comprehensive Earnings
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	1,336	1,049	1,666	119
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	(541)	(578)	(1,082)	(1,158)
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	$ 1,877	$ 1,627	$ 2,748	$ 1,277