CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) EARNINGS - USD ($) $ in Millions	3 Months Ended
Apr. 30, 2020	Apr. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (64.6)	$ 125.2
Other comprehensive (loss) earnings, net of tax
Foreign currency translation adjustments, net of tax	(28.1)	(24.2)
Unrealized gain on hedging instruments	5.3	8.8
Unrealized gain on benefit plans	4.3	2.2
Total other comprehensive loss, net of tax	(18.5)	(13.2)
Comprehensive (loss) earnings	$ (83.1)	$ 112.0

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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