Shareholders' Equity Shareholders' Equity - Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Feb. 01, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Basic net income (loss) per share:
Net income (loss)									$ 827.0	$ (1,590.8)	$ 1,714.3
Weighted average number of shares outstanding (in shares)									237.2	237.9	236.8
Basic net income (loss) per share (usd per share)									$ 3.49	$ (6.69)	$ 7.24
Diluted net income (loss) per share:
Net income (loss)									$ 827.0	$ (1,590.8)	$ 1,714.3
Weighted average number of shares outstanding (in shares)									237.2	237.9	236.8
Dilutive effect of stock options and restricted stock (as determined by applying the treasury stock method) (in shares)									1.1	0.0	0.9
Weighted average number of shares and dilutive potential shares outstanding (in shares)									238.3	237.9	237.7
Diluted net income (loss) per share (usd per share)	$ 0.52	$ 1.08	$ 0.76	$ 1.12	$ (9.69)	$ 1.18	$ 1.15	$ 0.67	$ 3.47	$ (6.69)	$ 7.21