CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Total Best Buy Co., Inc. Shareholders' Equity	Common Stock	Prepaid Share Repurchase	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning balances at Jan. 31, 2015	$ 5,000	$ 4,995	$ 35		$ 437	$ 4,141	$ 382	$ 5
Beginning balances (in shares) at Jan. 31, 2015			352
Increase (decrease) in shareholders' equity
Net earnings	897	897	$ 0		0	897	0	0
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(44)	(44)					(44)	0
Reclassification of foreign currency translations adjustments into earnings due to sale of business	(67)	(67)	$ 0		0	0	(67)	0
Prepaid repurchase of common stock	(55)	(55)		$ (55)			0	0
Tax benefits from stock options exercised, restricted stock vesting and employee stock purchase plan	2	2			2
Restricted stock vested and stock options exercised (in shares)			5
Restricted stock vested and stock options exercised	40	40			40
Issuance of common stock under employee stock purchase plan	7	7	$ 0		7
Stock-based compensation	104	104			104
Common stock dividends, $1.36 per share during the period ended Feb. 3, 2018, $1.57 per share during the period ended January 28, 2017, $1.43 per share during the period ended January 30, 2016, respectively	(501)	(501)			3	(504)	0
Sale of noncontrolling interest	(5)		0		0	0		(5)
Repurchase of common stock	(1,000)	(1,000)	$ (3)		(593)	(404)
Repurchase of common stock (in shares)			(33)
Ending balances at Jan. 30, 2016	4,378	4,378	$ 32	(55)	0	4,130	271	0
Ending balances (in shares) at Jan. 30, 2016			324
Increase (decrease) in shareholders' equity
Net earnings	1,228	1,228	$ 0		0	1,228	0	0
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	10	10	0		0	0	10	0
Reclassification of foreign currency translations adjustments into earnings due to sale of business	(2)	(2)	0		0	0	(2)	0
Settlement of accelerated share repurchase	55	55	$ 0	55	0	0	0	0
Tax benefits from stock options exercised, restricted stock vesting and employee stock purchase plan	17	17			17
Restricted stock vested and stock options exercised (in shares)			8
Restricted stock vested and stock options exercised	164	164	$ 1		163
Issuance of common stock under employee stock purchase plan	7	7	0		7
Stock-based compensation	108	108			108
Common stock dividends, $1.36 per share during the period ended Feb. 3, 2018, $1.57 per share during the period ended January 28, 2017, $1.43 per share during the period ended January 30, 2016, respectively	(505)	(505)	0		0	(505)	0	0
Repurchase of common stock	(751)	(751)	$ (2)		(295)	(454)
Repurchase of common stock (in shares)			(21)
Ending balances at Jan. 28, 2017	4,709	4,709	$ 31	0	0	4,399	279	0
Ending balances (in shares) at Jan. 28, 2017			311
Increase (decrease) in shareholders' equity
ASU adoption cumulative adjustment	(2)	(2)			10	(12)
Net earnings	1,000	1,000	$ 0		0	1,000	0	0
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	35	35	$ 0		0	0	35	0
Reclassification of foreign currency translations adjustments into earnings due to sale of business	0
Restricted stock vested and stock options exercised (in shares)			7
Restricted stock vested and stock options exercised	156	156	$ 1		155	0	0	0
Issuance of common stock under employee stock purchase plan	7	7	0		7	0	0	0
Stock-based compensation	129	129	0		129	0	0	0
Common stock dividends, $1.36 per share during the period ended Feb. 3, 2018, $1.57 per share during the period ended January 28, 2017, $1.43 per share during the period ended January 30, 2016, respectively	(411)	(411)	0		0	(411)	0	0
Repurchase of common stock	(2,009)	(2,009)	$ (4)		(299)	(1,706)
Repurchase of common stock (in shares)			(35)
Other	(2)	(2)			(2)
Ending balances at Feb. 03, 2018	$ 3,612	$ 3,612	$ 28	$ 0	$ 0	$ 3,270	$ 314	$ 0
Ending balances (in shares) at Feb. 03, 2018			283