Acquisitions - Acquired Intangible Assets and Weighted Average Useful Life (Details) - I&S (acquisition) $ in Millions	Jan. 31, 2020 USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 52.5
Trademarks and Trade Names
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 2.6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years
Customer Relationships
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 49.0
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	14 years
Order or Production Backlog
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 0.9
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year