Shareholders' Equity - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2026	Feb. 01, 2025	Feb. 03, 2024
Numerator
Net earnings	$ 1,069	$ 927	$ 1,241
Denominator
Weighted-average common shares outstanding (in shares)	211.0	215.2	217.7
Effect of Potentially Dilutive Securities [Abstract]
Dilutive effect of stock compensation plan awards (in shares)	1.1	1.4	0.8
Weighted-average common shares outstanding, assuming dilution (in shares)	212.1	216.6	218.5
Potential shares which were anti-dilutive and excluded from weighted-average share computations (in shares)	0.1	0.0	0.0
Earnings per share attributable to Best Buy Co., Inc.
Basic (in dollars per share)	$ 5.06	$ 4.31	$ 5.70
Diluted (in dollars per share)	$ 5.04	$ 4.28	$ 5.68