Amount classified as accounts payable and accrued liabilities attributable to disposal group held for sale or disposed of.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1107-107759

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Balance Type:	credit
Period Type:	instant

Restructuring and Other Charges - Narrative (Details) $ in Millions	3 Months Ended
	Dec. 28, 2018 USD ($)	Dec. 29, 2017 USD ($)	Mar. 27, 2015 Business
Restructuring Cost and Reserve [Line Items]
Number of lines of business \| Business			4
ECR Business
Restructuring Cost and Reserve [Line Items]
Liabilities held for sale	$ 33.2
CH2M HILL Companies, Ltd.
Restructuring Cost and Reserve [Line Items]
Restructuring pre-tax net charges	8.2	$ 5.5
Integration related costs	$ 26.0	$ 13.8