Restructuring and Other Related Charges - Additional Information (Details)	1 Months Ended		5 Months Ended	12 Months Ended
	Nov. 30, 2016 USD ($) position	Oct. 31, 2015 USD ($)	Aug. 01, 2015 USD ($)	Jan. 28, 2017 USD ($) employee	Jan. 30, 2016 USD ($) employee	Jan. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges				$ 105,186,000	$ 63,543,000	$ 13,824,000
Total number of employees to be terminated | position	900
Restructuring charges				53,074,000	47,511,000	10,421,000
Release of reserves				$ (469,000)
Number of employees departed and were paid severance and related benefit costs | employee				500
Asset impairment charges			$ 1,400,000	$ 6,952,000	6,736,000	17,000
Proceeds from equipment held for sale		$ 9,300,000		0	10,007,000	0
Gain or loss recognized upon sale of equipment held for sale		$ 0
Loss on early contract termination				0	1,644,000	3,230,000
Severance
Restructuring Cost and Reserve [Line Items]
Release of reserves				86,000	0	0
Other exit-related costs
Restructuring Cost and Reserve [Line Items]
Release of reserves				383,000	0	$ 0
November 2016 Restructuring
Restructuring Cost and Reserve [Line Items]
Total number of employees to be terminated | position	900
Restructuring charges				98,700,000
November 2016 Restructuring | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring costs, expected cost to incur	$ 90,000,000
Restructuring costs, expected cash charges	35,000,000
Restructuring, expected additional charges				10,000,000
November 2016 Restructuring | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring costs, expected cost to incur	110,000,000
Restructuring costs, expected cash charges	$ 50,000,000
Restructuring, expected additional charges				15,000,000
November 2016 Restructuring | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges				41,020,000	0
Release of reserves				0
November 2016 Restructuring | Other exit-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				5,452,000	0
Release of reserves				0
November 2016 Restructuring | Facilities and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				1,872,000	0
Release of reserves				0
November 2016 Restructuring | Contract termination
Restructuring Cost and Reserve [Line Items]
Restructuring charges				45,000,000
November 2016 Restructuring | Impairment of equipment and technology licenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges				5,400,000
Mobile Platform Business
Restructuring Cost and Reserve [Line Items]
Restructuring charges				1,900,000	$ 44,400,000
Cumulative costs incurred				$ 46,400,000
Number of employees retained | employee				140
Number of employees offered with retention bonuses | employee				128
Mobile Platform Business | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring costs, expected cost to incur							$ 100,000,000
Mobile Platform Business | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring costs, expected cost to incur							$ 130,000,000
Mobile Platform Business | Severance
Restructuring Cost and Reserve [Line Items]
Cumulative costs incurred				$ 28,100,000
Number of employees departed and were paid severance and related benefit costs | employee					825
Mobile Platform Business | Facilities and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				4,600,000	$ 1,400,000
Cumulative costs incurred				200,000
Mobile Platform Business | Contract termination
Restructuring Cost and Reserve [Line Items]
Release of reserves				300,000
Cumulative costs incurred				1,300,000
Mobile Platform Business | Impairment of equipment and technology licenses
Restructuring Cost and Reserve [Line Items]
Cumulative costs incurred				8,800,000
Mobile Platform Business | Write-off of assets held-for-sale
Restructuring Cost and Reserve [Line Items]
Restructuring charges				2,200,000
Mobile Platform Business | Write down of inventory
Restructuring Cost and Reserve [Line Items]
Cumulative costs incurred				$ 8,000,000
Reduction in Operations in Israel and Closing of Other Design Centers
Restructuring Cost and Reserve [Line Items]
Total number of employees to be terminated | employee					358
Restructuring charges					$ 16,300,000
Reduction in Operations in Israel and Closing of Other Design Centers | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges					15,100,000
Reduction in Operations in Israel and Closing of Other Design Centers | Facilities and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 1,200,000