Stock-Based Compensation - Additional Information (Detail) - USD ($)				3 Months Ended		6 Months Ended
		May 02, 2017	May 27, 2016	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016	Jan. 28, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense				$ 30,900,000	$ 10,300,000	$ 36,166,000	$ 14,303,000
Stock-based compensation cost capitalized				0	0	0	0
Rollover units and profit interests	[1]			1,998,000		1,998,000		$ 1,784,000
Selling, general and administrative expenses				193,690,000	157,824,000	$ 357,050,000	296,774,000
Design Investors WW Acquisition Company, LLC [Member] | Profit Interests [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Profit interest expected life						5 years
Selling, general and administrative expenses				100,000	100,000	$ 200,000	100,000
Design Investors WW Acquisition Company, LLC [Member] | Profit Interests [Member] | Other Non-Current Obligations [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Liability associated with the profit interests				500,000		$ 500,000		300,000
Stock Options [Member] | Chairman and Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		1,000,000
Exercise price of option granted		$ 50
Time Based Restricted [Member] | Chairman and Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of share lapse per year		250,000
Time Based Restricted [Member] | Chairman and Chief Executive Officer [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option vesting period		4 years
Performance Based Restricted [Member] | Chairman and Chief Executive Officer [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected vested exercise price description						performance-based restrictions linked to achieving the Company’s common stock price objectives of $100, $125 and $150 per share
Appreciation Rights [Member] | Design Investors WW Acquisition Company, LLC [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Rollover units and profit interests				1,500,000		$ 1,500,000		$ 1,500,000
Appreciation Rights [Member] | Design Investors WW Acquisition Company, LLC [Member] | Rollover Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense				$ 0	0	$ 0	0
2012 Stock Incentive Plan and 2012 Stock Option Plan [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding shares				8,997,210		8,997,210
Options outstanding, weighted-average exercise price per share				$ 49.81		$ 49.81
Numbers of options vested						6,461,464
Vested weighted-average exercise price per share						$ 51.31
Aggregate intrinsic value of options outstanding				$ 196,400,000		$ 196,400,000
Aggregate intrinsic value of options vested or expected to vest				168,900,000		168,900,000
Aggregate intrinsic value of options exercisable				113,000,000		$ 113,000,000
Weighted-average remaining contractual life of options exercisable						6 years 7 months 14 days
Unrecognized compensation expense related to unvested options				$ 28,000,000		$ 28,000,000
Unrecognized compensation expense with weighted-average period						3 years 6 months 11 days
2012 Stock Incentive Plan and 2012 Stock Option Plan [Member] | Restricted Stock And Restricted Stock Unit [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense with weighted-average period						3 years 5 months 12 days
Outstanding shares				838,377		838,377
Restricted stock awards outstanding with weighted-average grant date fair value per share				$ 52.84		$ 52.84
Vested restricted stock unit				232,534		246,253
Vested weighted-average grant date fair value				$ 57.38		$ 57.98
Vested weighted-average vest date fair value				$ 53.71		$ 53.32
Unrecognized compensation expense related to unvested options				$ 23,900,000		$ 23,900,000
Time-Based Restrictions and Performance-Based Restrictions [Member] | Chairman and Chief Executive Officer [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense				$ 23,900,000		$ 23,900,000
Performance-Based Restrictions [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, lapse description						The stock price objectives are measured each year and are set at prices for the Company’s common stock of $100, $125 and $150 per share. If all three stock price objectives are met in the first performance year, restrictions will lapse as to 250,000 shares in aggregate at the end of such year, with 83,333 shares tied to a $100 price per share, 83,333 shares tied to a $125 price per share and 83,334 shares tied to a $150 price per share. The same price performance tests are applied in the second year of performance such that restrictions will lapse for an additional 250,000 shares at the end of the second year and then again as to an additional 250,000 shares at the end of each of the third and fourth years so long as Mr. Friedman remains employed at the end of each year.
Performance-Based Restrictions [Member] | Common Stock Achieving Price per Share of $100 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		83,333
Exercise price of option granted		$ 100
Performance-Based Restrictions [Member] | Common Stock Achieving Price per Share of $125 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		83,333
Exercise price of option granted		$ 125
Performance-Based Restrictions [Member] | Common Stock Achieving Price per Share of $150 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		83,334
Exercise price of option granted		$ 150
Performance-Based Restrictions [Member] | First Performance Year [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		250,000
Performance-Based Restrictions [Member] | Second Performance Year [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		250,000
Performance-Based Restrictions [Member] | Third Performance Year [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		250,000
Performance-Based Restrictions [Member] | Fourth Performance Year [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option to purchase of common stock		250,000
2012 Stock Incentive Plan [Member] | Waterworks Associates [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					$ 3,700,000		$ 3,700,000
Exercise price of option granted			$ 33.54
Common stock, lapse description						options are fully vested as of the date of grant but any shares issued upon exercise of such options will be subject to selling restrictions which are scheduled to lapse in five equal installments on the first, second, third, fourth and fifth anniversaries of the grant date.
Stock option granted			322,784

[1] Represents rollover units and profit interests associated with the acquisition of Waterworks. Refer to Note 15—Stock-Based Compensation.