Hedging Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - Jul. 31, 2019 € in Millions, ₩ in Millions, ¥ in Millions, £ in Millions, kr in Millions, Kč in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	JPY (¥)	GBP (£)	AUD ($)	SGD ($)	EUR (€)	DKK (kr)	CZK (Kč)	KRW (₩)	USD ($)	NZD ($)
Foreign Exchange Forward | Not Designated as Hedging Instrument | Japan, Yen
Derivative [Line Items]
Derivative notional amount	¥ 1,577.4								$ 14.6
Foreign Exchange Forward | Not Designated as Hedging Instrument | United Kingdom, Pounds
Derivative [Line Items]
Derivative notional amount		£ 5.8							7.2
Foreign Exchange Forward | Not Designated as Hedging Instrument | United States of America, Dollars
Derivative [Line Items]
Derivative notional amount									111.1
Foreign Exchange Forward | Not Designated as Hedging Instrument | Euro Member Countries, Euro
Derivative [Line Items]
Derivative notional amount					€ 6.6				7.4
Foreign Exchange Forward | Not Designated as Hedging Instrument | Australia, Dollars
Derivative [Line Items]
Derivative notional amount			$ 31.9						22.2
Foreign Exchange Forward | Not Designated as Hedging Instrument | Czech Republic, Koruny
Derivative [Line Items]
Derivative notional amount							Kč 133.5		5.9
Foreign Exchange Forward | Not Designated as Hedging Instrument | Denmark, Kroner
Derivative [Line Items]
Derivative notional amount						kr 52.0			7.9
Foreign Exchange Forward | Not Designated as Hedging Instrument | Korea (South), Won
Derivative [Line Items]
Derivative notional amount								₩ 23,775.7	21.2
Foreign Exchange Forward | Not Designated as Hedging Instrument | New Zealand, Dollars
Derivative [Line Items]
Derivative notional amount									7.2	$ 10.7
Foreign Exchange Forward | Not Designated as Hedging Instrument | Singapore, Dollars
Derivative [Line Items]
Derivative notional amount				$ 20.4					15.0
Foreign Exchange Forward | Cash Flow Hedging | Japan, Yen
Derivative [Line Items]
Derivative notional amount	19,580.8								181.9
Foreign Exchange Forward | Cash Flow Hedging | United Kingdom, Pounds
Derivative [Line Items]
Derivative notional amount		£ 11.1							14.5
July 2016
Derivative [Line Items]
Derivative notional amount	10,600.0								100.0
March 2017
Derivative [Line Items]
Derivative notional amount	11,000.0								96.1
May 2017
Derivative [Line Items]
Derivative notional amount	¥ 5,600.0								$ 50.0