Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands					12 Months Ended
	Sep. 01, 2020	Jun. 01, 2020	Oct. 17, 2018	Jan. 02, 2018	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired					$ 142,414	$ 12,486	$ 50,586
Goodwill					1,713,354	1,614,739	1,608,018
Advanced Technology Solutions
Business Acquisition [Line Items]
Goodwill					$ 1,297,492	$ 1,203,278	$ 1,194,969
Customer Relationships
Business Acquisition [Line Items]
Intangible assets amortization period					14 years
Trade Names
Business Acquisition [Line Items]
Intangible assets amortization period					15 years
Non-compete Agreements
Business Acquisition [Line Items]
Intangible assets amortization period					4 years
vivaMOS Ltd. | 2020 Acquisition
Business Acquisition [Line Items]
Acquired percent of the outstanding shares	100.00%
Acquisition of businesses, net of cash acquired	$ 17,154
Cash acquired from business acquisition	158
Goodwill	14,394
Identifiable intangible assets	4,040
vivaMOS Ltd. | Technology-Based Intangible Assets | 2020 Acquisition
Business Acquisition [Line Items]
Identifiable intangible assets	$ 3,900
Intangible assets amortization period	10 years
vivaMOS Ltd. | Non-compete Agreements | 2020 Acquisition
Business Acquisition [Line Items]
Identifiable intangible assets	$ 140
Intangible assets amortization period	3 years
Fluortek Inc
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired		$ 125,260
Cash acquired from business acquisition		$ 515
Fluortek Inc | 2020 Acquisition
Business Acquisition [Line Items]
Acquired percent of the outstanding shares		100.00%
Acquisition of business, earn-out liability		$ 19,843
Goodwill		76,047
Identifiable intangible assets		29,370
Fluortek Inc | Customer Relationships | 2020 Acquisition
Business Acquisition [Line Items]
Identifiable intangible assets		$ 19,700
Intangible assets amortization period		12 years
Fluortek Inc | Trade Names | 2020 Acquisition
Business Acquisition [Line Items]
Identifiable intangible assets		$ 1,500
Intangible assets amortization period		10 years
Fluortek Inc | Technology-Based Intangible Assets | 2020 Acquisition
Business Acquisition [Line Items]
Identifiable intangible assets		$ 7,400
Intangible assets amortization period		10 years
Fluortek Inc | Non-compete Agreements | 2020 Acquisition
Business Acquisition [Line Items]
Identifiable intangible assets		$ 770
Intangible assets amortization period		5 years
Cladach Nua Teoranta | 2018 Acquisition
Business Acquisition [Line Items]
Acquired percent of the outstanding shares			100.00%
Acquisition of businesses, net of cash acquired			$ 5,236
Acquisition of business, earn-out liability			1,131
Goodwill			3,776
Identifiable intangible assets			$ 697
Sonoscan, Inc. | 2018 Acquisition
Business Acquisition [Line Items]
Acquired percent of the outstanding shares				100.00%
Acquisition of businesses, net of cash acquired				$ 46,018
Cash acquired from business acquisition				655
Goodwill				22,775
Identifiable intangible assets				$ 7,910