Acquisitions of Businesses - Schedule of Identifiable Intangible Assets Recorded in Conjunction with Acquisitions (Details) - OMG Malaysia $ in Millions	Jan. 31, 2016 USD ($)
Business Acquisition [Line Items]
Fair Value	$ 43.9
Weighted average useful life (years)	14 years 3 months 18 days
Customer lists
Business Acquisition [Line Items]
Fair Value	$ 41.0
Weighted average useful life (years)	15 years
Developed technology
Business Acquisition [Line Items]
Fair Value	$ 2.9
Weighted average useful life (years)	5 years