Restructuring and Other Related Charges - Charges Related to Restructuring Actions (Details) - USD ($) $ in Thousands	5 Months Ended	12 Months Ended
	Aug. 01, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Restructuring and Related Activities [Abstract]
Severance and related costs		$ 41,035	$ 43,926	$ 5,181
Facilities and related costs		6,587	1,407	1,924
Loss on early contract termination		0	1,644	3,230
Other exit-related costs		5,452	534	86
Restructuring charges		53,074	47,511	10,421
Restructuring Cost and Reserve [Line Items]
Release of reserves		469
Impairment and write-off of assets:
Prepaid deposit		45,000	0	0
Inventory		0	8,046	0
Technology licenses		629	1,250	0
Equipment and other	$ 1,400	6,952	6,736	17
Acquired intangible asset		0	0	3,386
Restructuring and other related charges		105,186	63,543	13,824
Severance
Restructuring Cost and Reserve [Line Items]
Release of reserves		(86)	0	0
Other exit-related costs
Restructuring Cost and Reserve [Line Items]
Release of reserves		$ (383)	$ 0	$ 0