Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Mar. 29, 2015	Mar. 30, 2014	Sep. 28, 2014
Reclassifications out of accumulated other comprehensive income (loss)
Balances at the beginning of the period					$ (42,538)
Balances at the end of the period	(112,620)		(112,620)		(42,538)
Foreign Currency Translation Adjustments
Reclassifications out of accumulated other comprehensive income (loss)
Balances at the beginning of the period	(67,654)	(19,756)	(43,085)	2,340
Other comprehensive income (loss) before reclassifications	(43,516)	(15,650)	(68,085)	(37,746)
Net current-period other comprehensive income (loss)	(43,516)	(15,650)	(68,085)	(37,746)
Balances at the end of the period	(111,170)	(35,406)	(111,170)	(35,406)
Loss on Derivative Instruments
Reclassifications out of accumulated other comprehensive income (loss)
Balances at the beginning of the period	67	343	547	(482)
Other comprehensive income (loss) before reclassifications	(938)	262	(828)	1,570
Net current-period other comprehensive income (loss)	(1,517)	(386)	(1,997)	439
Balances at the end of the period	(1,450)	(43)	(1,450)	(43)
Loss on Derivative Instruments | Foreign exchange contracts
Reclassifications out of accumulated other comprehensive income (loss)
Reclassification adjustment of prior derivative settlement, net of tax	(579)	(648)	(1,169)	(1,131)
Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive income (loss)
Balances at the beginning of the period	(67,587)	(19,413)	(42,538)	1,858
Other comprehensive income (loss) before reclassifications	(44,454)	(15,388)	(68,913)	(36,176)
Net current-period other comprehensive income (loss)	(45,033)	(16,036)	(70,082)	(37,307)
Balances at the end of the period	(112,620)	(35,449)	(112,620)	(35,449)
Accumulated Other Comprehensive Income | Foreign exchange contracts
Reclassifications out of accumulated other comprehensive income (loss)
Reclassification adjustment of prior derivative settlement, net of tax	$ (579)	$ (648)	$ (1,169)	$ (1,131)