Hedging Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - Apr. 30, 2019 € in Millions, ₩ in Millions, ¥ in Millions, £ in Millions, kr in Millions, SFr in Millions, Kč in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	JPY (¥)	GBP (£)	AUD ($)	SGD ($)	EUR (€)	HKD ($)	DKK (kr)	NZD ($)	CZK (Kč)	KRW (₩)	USD ($)	CHF (SFr)
Foreign Exchange Forward | Not Designated as Hedging Instrument | Japan, Yen
Derivative [Line Items]
Derivative notional amount	¥ 888.2										$ 8.0
Foreign Exchange Forward | Not Designated as Hedging Instrument | United Kingdom, Pounds
Derivative [Line Items]
Derivative notional amount		£ 19.4									25.5
Foreign Exchange Forward | Not Designated as Hedging Instrument | United States of America, Dollars
Derivative [Line Items]
Derivative notional amount											57.7
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			$ 30.4								21.7
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 | Korea (South), Won
Derivative [Line Items]
Derivative notional amount										₩ 45,292.2	40.4
Foreign Exchange Forward | Not Designated as Hedging Instrument | Hong Kong, Dollars
Derivative [Line Items]
Derivative notional amount						$ 63.7					8.1
Foreign Exchange Forward | Not Designated as Hedging Instrument | New Zealand, Dollars
Derivative [Line Items]
Derivative notional amount								$ 10.7			7.2
Foreign Exchange Forward | Not Designated as Hedging Instrument | Singapore, Dollars
Derivative [Line Items]
Derivative notional amount				$ 19.8							14.6
Foreign Exchange Forward | Not Designated as Hedging Instrument | Switzerland, Francs
Derivative [Line Items]
Derivative notional amount											5.5	SFr 5.5
Foreign Exchange Forward | Not Designated as Hedging Instrument | Denmark, Kroner
Derivative [Line Items]
Derivative notional amount							kr 52.0				7.9
Foreign Exchange Forward | Cash Flow Hedging | Japan, Yen
Derivative [Line Items]
Derivative notional amount	18,653.1										172.6
Foreign Exchange Forward | Cash Flow Hedging | United Kingdom, Pounds
Derivative [Line Items]
Derivative notional amount		£ 11.5									15.1
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