Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 27, 2015	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013
Goodwill
Balance at beginning of the period		$ 714,190	$ 722,792
Goodwill additions		6,272	20,624
Foreign exchange translation		(60,965)	(29,701)
Goodwill adjustments			475
Goodwill impairment	$ (58,100)	(58,118)
Balance at end of the period	$ 601,379	601,379	714,190	$ 722,792
Percentage of decline in revenue	25.00%
Impairment of goodwill and other intangible assets	$ 60,800	60,763		56,600
Impairment of goodwill and other intangible assets, net of tax	57,300
Identifiable intangible assets that were determined not to be recoverable	2,700
WEI
Goodwill
Balance at beginning of the period		231,991	229,931
Goodwill additions			8,982
Foreign exchange translation		(21,243)	(6,922)
Balance at end of the period	210,748	210,748	231,991	229,931
Gross amounts of goodwill	241,800	241,800	263,100
Accumulated impairment	31,100	31,100	31,100
RME
Goodwill
Balance at beginning of the period		482,199	492,861
Goodwill additions		6,272	11,642
Foreign exchange translation		(39,722)	(22,779)
Goodwill adjustments			475
Goodwill impairment		(58,118)
Balance at end of the period	390,631	390,631	482,199	$ 492,861
Gross amounts of goodwill	475,100	475,100	508,600
Accumulated impairment	$ 84,500	$ 84,500	$ 84,500
WMG | Maximum
Goodwill
Percentage of excess of fair value over carrying value	20.00%	20.00%