Capital Stock and Earnings Per Share - Additional Information (Detail) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016	Feb. 28, 2017	Feb. 29, 2016
Capital Unit [Line Items]
Common stock repurchased and retired			$ 884,683,000
Cash payments for repurchase of common stock			$ 884,700,000	$ 756,200,000
Antidilutive options excluded	8.0	4.0	8.0	4.0
Trade Date Basis
Capital Unit [Line Items]
Common stock repurchased and retired (in shares)	7.5		12.0
Common stock repurchased and retired	$ 550,000,000		$ 900,000,000
Stock Repurchase Programs 2016
Capital Unit [Line Items]
Common stock repurchased and retired (in shares)			14.8
Common stock repurchased and retired			$ 1,100,000,000
Stock repurchase program, common stock purchase value						$ 2,000,000,000
Remaining available stock under stock repurchase plan	$ 890,800,000		$ 890,800,000
Stock Repurchase Programs 2017
Capital Unit [Line Items]
Stock repurchase program, common stock purchase value					$ 1,000,000,000