Effect of Derivative Instruments on Consolidated Statement of Operations and Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 30, 2018	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017
Fair Value Hedges \| Cost of Sales
Derivative Instruments Gain Loss [Line Items]
Gains (losses) on contracts designated as fair value hedges and embedded derivatives	$ (893)	$ 692	$ (1,271)	$ (241)
Fair Value Hedges \| Selling, General & Administrative
Derivative Instruments Gain Loss [Line Items]
Gains (losses) on contracts designated as fair value hedges and embedded derivatives	(691)	561	(1,014)	(207)
Net Investment Hedges \| 2023 Notes and Accrued Interest
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in AOCI	(10,682)	(4,534)	(16,979)	19,379
Embedded Derivatives \| Sales
Derivative Instruments Gain Loss [Line Items]
Gains (losses) on contracts designated as fair value hedges and embedded derivatives	386	(518)	706	(265)
Foreign Exchange Forward \| Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in AOCI (effective portion)	(11,797)	9,355	(14,291)	6,939
Gain (Loss) Reclassified from AOCI into sales	$ 4,984	$ (3,446)	$ 6,918	$ (7,871)

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Amount, before tax, of increase (decrease) in the cumulative translation adjustment from gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900

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