Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015	Jan. 30, 2016	Jan. 31, 2015
Summary Of Significant Accounting Policies [Line Items]
Share-based compensation	$ 27,500	$ 27,300	$ 77,380	$ 71,063
Options to purchase common stock exercised	0.7		4.0
Options outstanding to purchase common stock	28.7		28.7
Unrecognized compensation cost related to nonvested share-based compensation arrangements	$ 100,700		$ 100,700
Highly liquid investments maximum maturity days			90 days
Cash and cash equivalents	2,375,532	1,723,336	$ 2,375,532	1,723,336	$ 2,095,473	$ 2,493,775
In-transit inventory accrual	785,000	816,600	$ 785,000	816,600	690,300
Rent expense recorded prior to minimum number of days before opening of store, in days			30 days
Rent expense recorded prior to maximum number of days before opening of store, in days			60 days
Other assets	258,223	205,852	$ 258,223	205,852	222,669
Long-term debt	2,226,913	1,614,529	2,226,913	1,614,529	1,615,003
Non-current deferred income taxes, net	3,624	17,317	3,624	17,317	13,831
Non-current deferred income taxes, net	317,107	257,335	317,107	257,335	285,102
ASU 2015-17 | Restatement Adjustment
Summary Of Significant Accounting Policies [Line Items]
Deferred tax asset reduction		(120,900)		(120,900)
Non-current deferred income taxes, net		(2,600)		(2,600)
Non-current deferred income taxes, net		(123,500)		(123,500)
ASU 2015-03 | Restatement Adjustment
Summary Of Significant Accounting Policies [Line Items]
Other assets		(9,500)		(9,500)	(9,100)
Long-term debt		$ (9,500)		$ (9,500)	$ (9,100)
Outside United States
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents	1,138,200		1,138,200
Reinvest Undistributed Earnings
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 253,300		$ 253,300
Minimum
Summary Of Significant Accounting Policies [Line Items]
Short-term investments maturity term			90 days
Maximum
Summary Of Significant Accounting Policies [Line Items]
Short-term investments maturity term			1 year