Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	Mar. 30, 2018	Sep. 29, 2017
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Unrealized gain on derivative contracts	$ 6,096	$ 13,469
Tax effect	(1,958)	(3,892)
Unrealized gain on derivative contracts, Total	4,138	9,577
Pension and post-retirement obligations	(79,921)	(81,782)
Tax effect	27,482	27,956
Pension and post-retirement obligations, Total	(52,439)	(53,826)
Foreign currency translation adjustment	(204,442)	(222,621)
Accumulated other comprehensive income (loss)	$ (252,743)	$ (266,870)