CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Apr. 30, 2015	Apr. 30, 2014
Income Statement [Abstract]
Net sales	$ 962.4us-gaap_SalesRevenueNet	$ 1,012.1us-gaap_SalesRevenueNet
Cost of sales	393.4us-gaap_CostOfGoodsAndServicesSold	422.6us-gaap_CostOfGoodsAndServicesSold
Gross profit	569.0us-gaap_GrossProfit	589.5us-gaap_GrossProfit
Selling, general and administrative expenses	399.0	379.7
Earnings from operations	170.0us-gaap_OperatingIncomeLoss	209.8us-gaap_OperatingIncomeLoss
Interest expense and financing costs	9.3us-gaap_NonoperatingIncomeExpense	16.3us-gaap_NonoperatingIncomeExpense
Earnings from operations before income taxes	160.7	193.5
Provision for income taxes	55.8us-gaap_IncomeTaxExpenseBenefit	67.9us-gaap_IncomeTaxExpenseBenefit
Net earnings	$ 104.9us-gaap_NetIncomeLoss	$ 125.6us-gaap_NetIncomeLoss
Net earnings per share:
Basic	$ 0.81us-gaap_EarningsPerShareBasic	$ 0.97us-gaap_EarningsPerShareBasic
Diluted	$ 0.81us-gaap_EarningsPerShareDiluted	$ 0.97us-gaap_EarningsPerShareDiluted
Weighted-average number of common shares:
Basic	129.2	128.9
Diluted	129.8	129.8

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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