Capital Stock and Earnings (Loss) Per Share - Calculation of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Basic earnings (loss) per share
Net income (loss)	$ 785,681	$ (214,220)	$ 1,319,611	$ (1,101,709)
Weighted average common shares outstanding for basic earnings (loss) per share calculation (in shares)	1,205,054	1,198,634	1,205,247	1,198,222
Basic earnings (loss) per share (in dollars per share)	$ 0.65	$ (0.18)	$ 1.09	$ (0.92)
Diluted earnings (loss) per share:
Net income (loss)	$ 785,681	$ (214,220)	$ 1,319,611	$ (1,101,709)
Weighted average common shares outstanding for basic earnings (loss) per share calculation (in shares)	1,205,054	1,198,634	1,205,247	1,198,222
Assumed exercise/vesting of stock options and awards (in shares)	15,561	0	15,765	0
Weighted average common shares outstanding for diluted earnings (loss) per share calculation (in shares)	1,220,615	1,198,634	1,221,012	1,198,222
Diluted earnings (loss) per share (in dollars per share)	$ 0.64	$ (0.18)	$ 1.08	$ (0.92)
Cash dividends declared per share (in dollars per share)	$ 0.26	$ 0	$ 0.52	$ 0