Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	Dec. 29, 2017	Sep. 29, 2017
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Unrealized gain on derivative contracts	$ 12,909	$ 13,469
Tax effect	(3,782)	(3,892)
Unrealized gain on derivative contracts, Total	9,127	9,577
Pension and post-retirement obligations	(80,940)	(81,782)
Tax effect	27,659	27,956
Pension and post-retirement obligations, Total	(53,281)	(53,826)
Foreign currency translation adjustment	(216,267)	(222,621)
Accumulated other comprehensive income (loss)	$ (260,421)	$ (266,870)