Share Repurchases - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Jul. 29, 2017	Apr. 29, 2017	Feb. 03, 2018	Feb. 03, 2018	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016	May 02, 2017	Feb. 21, 2017
Equity Class Of Treasury Stock [Line Items]
Shares of common stock purchased under repurchase program, shares							2,625
Shares of common stock purchased under repurchase program					$ 1,000,328,000		$ 238,000
Unpaid principal amount of notes payable for share repurchases			$ 19,390,000	$ 19,390,000	$ 19,390,000	$ 19,390,000
$700 Million Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Shares of common stock purchased under repurchase program, shares	12,400,000		0
Shares of common stock purchased at an average price per share under repurchase program	$ 56.60
Shares of common stock purchased under repurchase program	$ 700,000,000
$300 Million Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Shares of common stock purchased under repurchase program, shares		7,800,000		0
Shares of common stock purchased at an average price per share under repurchase program		$ 38.24
Shares of common stock purchased under repurchase program		$ 300,000,000
Share Repurchases Under Equity Plans [Member]
Equity Class Of Treasury Stock [Line Items]
Shares of common stock purchased under repurchase program, shares					0	0
Unpaid principal amount of notes payable for share repurchases			$ 19,400,000	$ 19,400,000	$ 19,400,000	$ 19,400,000
Interest expense related to notes payable for share repurchases					1,000,000	1,000,000	$ 1,000,000
Share Repurchases Under Equity Plans [Member] | Promissory Notes [Member]
Equity Class Of Treasury Stock [Line Items]
Promissory notes issued					0	0
Board of Directors [Member] | Maximum [Member] | $700 Million Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program authorized amount								$ 700,000,000
Board of Directors [Member] | Maximum [Member] | $300 Million Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program authorized amount									$ 300,000,000
Director [Member] | Share Repurchases Under Equity Plans [Member]
Equity Class Of Treasury Stock [Line Items]
Unpaid principal amount of notes payable for share repurchases			$ 15,500,000	$ 15,500,000	$ 15,500,000	$ 15,500,000