Hedging Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - Jan. 31, 2019 € in Millions, ₩ in Millions, ¥ in Millions, £ in Millions, kr in Millions, Kč in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	JPY (¥)	GBP (£)	AUD ($)	SGD ($)	EUR (€)	HKD ($)	DKK (kr)	CZK (Kč)	KRW (₩)	USD ($)	NZD ($)
Foreign Exchange Forward | Not Designated as Hedging Instrument | Japan, Yen
Derivative [Line Items]
Derivative, notional amount	¥ 1,816.6									$ 16.6
Foreign Exchange Forward | Not Designated as Hedging Instrument | United Kingdom, Pounds
Derivative [Line Items]
Derivative, notional amount		£ 6.3								8.3
Foreign Exchange Forward | Not Designated as Hedging Instrument | United States of America, Dollars
Derivative [Line Items]
Derivative, notional amount										47.4
Foreign Exchange Forward | Not Designated as Hedging Instrument | Euro Member Countries, Euro
Derivative [Line Items]
Derivative, notional amount					€ 6.6					7.7
Foreign Exchange Forward | Not Designated as Hedging Instrument | Australia, Dollars
Derivative [Line Items]
Derivative, notional amount			$ 44.0							31.8
Foreign Exchange Forward | Not Designated as Hedging Instrument | Czech Republic, Koruny
Derivative [Line Items]
Derivative, notional amount								Kč 134.1		6.0
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										7.3	$ 11.2
Foreign Exchange Forward | Not Designated as Hedging Instrument | Singapore, Dollars
Derivative [Line Items]
Derivative, notional amount				$ 20.3						15.0
Foreign Exchange Forward | Not Designated as Hedging Instrument | Korea (South), Won
Derivative [Line Items]
Derivative, notional amount									₩ 21,516.5	19.2
Foreign Exchange Forward | Not Designated as Hedging Instrument | Switzerland, Francs
Derivative [Line Items]
Derivative, notional amount							kr 50.4			7.7
Foreign Exchange Forward | Cash Flow Hedging | Japan, Yen
Derivative [Line Items]
Derivative, notional amount	16,902.4									157.4
Foreign Exchange Forward | Cash Flow Hedging | United Kingdom, Pounds
Derivative [Line Items]
Derivative, notional amount		£ 14.7								19.4
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