Consolidated Statement of Shareholders' Equity and Noncontrolling Interests (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Sep. 28, 2018	Sep. 29, 2017	Sep. 30, 2016
Statement Of Stockholders Equity [Abstract]
Common stock, par value	$ 0.20	$ 0.20	$ 0.20
Change in fair value of derivative financial instruments, net of tax (expense) benefit	$ 5,565	$ (4,969)	$ (4,959)
Change in pension and post-retirement obligations, net of tax (expense) benefit	$ (5,821)	$ (11,848)	$ 6,029

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (i-k)
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683

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