Quarterly Financial Information - Unaudited (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 2,293.1	$ 1,156.9	$ 1,399.6	$ 1,403.4	$ 2,269.9	$ 1,186.2	$ 1,373.4	$ 1,578.9	$ 6,253.0	$ 6,408.4	$ 6,550.2
Gross margin	919.8	321.1	457.9	491.2	945.5	350.0	464.9	600.4	2,190.0	2,360.8	2,440.4
Net income	$ 343.0	$ (12.1)	$ 85.2	$ 70.3	$ 287.8	$ 14.8	$ 81.9	$ 146.8	$ 519.3	$ 543.2	$ 467.9
Earnings per common share:
Earnings per share - basic (usd per share)	$ 5.70	$ (0.20)	$ 1.34	$ 1.03	$ 4.17	$ 0.20	$ 1.06	$ 1.87	$ 7.72	$ 7.13	$ 5.89
Earnings per share - diluted (usd per share)	$ 5.24	$ (0.20)	$ 1.33	$ 1.03	$ 3.92	$ 0.20	$ 1.06	$ 1.87	$ 7.44	$ 7.08	$ 5.87

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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