Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 24, 2021		Sep. 25, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		$ (10,594)		$ (20,625)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(13,621)		(123)
Income tax effect - benefit/(expense)		(34)		(646)
Net of tax		(7,833)		6,651
Realized gains/(losses)	[1]	9,243		4,045
Income tax effect - benefit/(expense)	[2]	(846)		(665)
Net of tax		8,397		3,380
Net current-period other comprehensive income/(loss)		564		10,031
Ending Balance		(10,030)		(10,594)
Investment Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		818		2,198
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(917)		(5,393)
Income tax effect - benefit/(expense)		120		(87)
Net of tax		(797)		(5,480)
Realized gains/(losses)	[1]	211		4,939
Income tax effect - benefit/(expense)	[2]	(12)		(839)
Net of tax		199		4,100
Net current-period other comprehensive income/(loss)		(598)		(1,380)
Ending Balance		220		818
Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		3,969
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(12,704)		5,270
Income tax effect - benefit/(expense)		415		(581)
Net of tax		(12,289)		4,689
Realized gains/(losses)		9,032	[1]	(894)
Income tax effect - benefit/(expense)		(834)		174
Net of tax		8,198		(720)
Net current-period other comprehensive income/(loss)		(4,091)		3,969
Ending Balance		(122)		3,969
Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		(15,381)		(22,823)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	[1]	5,754		7,420
Income tax effect - benefit/(expense)		(501)		22
Net of tax		5,253		7,442
Net current-period other comprehensive income/(loss)		5,253		7,442
Ending Balance		$ (10,128)		$ (15,381)

[1] Realized gains or losses, if any, from the sale of our AFS investment securities or from foreign currency translation adjustments are included within other income/expense, net in our consolidated statements of operations

[2] The income tax benefit or expense is included within provision for income taxes in our consolidated statements of operations.