Capital Stock and Earnings Per Share - Capital Stock and Earnings Per Share - Additional Information (Detail)			3 Months Ended		6 Months Ended		18 Months Ended
	Nov. 06, 2018 shares	Oct. 30, 2018	Aug. 03, 2019 USD ($) shares	Aug. 04, 2018 USD ($) shares	Aug. 03, 2019 USD ($) shares	Aug. 04, 2018 USD ($) shares	Aug. 03, 2019 USD ($) shares	Feb. 28, 2019 USD ($)	Feb. 02, 2019 shares	Oct. 22, 2018 shares	Feb. 28, 2018 USD ($)
Capital Unit [Line Items]
Stock split ratio, common stock	2	2
Issuance of common stock in result from stock split (in shares) | shares	617,000,000
Common stock, shares authorized (in shares) | shares	1,800,000,000		1,800,000,000	1,800,000,000	1,800,000,000	1,800,000,000	1,800,000,000		1,800,000,000	600,000,000
Common stock repurchased and retired			$ 302,457,000	$ 594,600,000	$ 699,751,000	$ 989,999,000
Cash payments for repurchase of common stock					700,000,000	$ 990,000,000
Remaining available stock under stock repurchase plan			$ 2,500,000,000		$ 2,500,000,000		$ 2,500,000,000
Antidilutive options excluded | shares			5,900,000	0	5,900,000	0
Trade date basis
Capital Unit [Line Items]
Common stock repurchased and retired (in shares) | shares			5,600,000		12,300,000
Common stock repurchased and retired			$ 300,000,000		$ 650,000,000
Stock repurchase program 2019
Capital Unit [Line Items]
Stock repurchase program, common stock purchase value								$ 1,500,000,000
Stock repurchase programs 2018
Capital Unit [Line Items]
Common stock repurchased and retired (in shares) | shares							38,700,000
Common stock repurchased and retired							$ 2,000,000,000.0
Stock repurchase program, common stock purchase value											$ 3,000,000,000.0