Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Effect of adoption of new accounting standard	Common Stock	Additional Paid-in-Capital	Additional Paid-in-Capital Effect of adoption of new accounting standard	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Effect of adoption of new accounting standard
Beginning balance at Oct. 31, 2017	$ 2,136,342	$ 62,123	$ 1,430	$ 6,810,182	$ 832	$ (11,017)	$ (4,664,253)	$ 61,291
Beginning balance (in shares) at Oct. 31, 2017			143,043,227
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(344,690)						(344,690)
Other comprehensive income (loss)	5,237					5,237
Reclassification of cash conversion feature	(152,142)			(152,142)
Conversion of convertible notes into common shares	262,103		$ 122	261,981
Conversion of convertible notes into common shares (in shares)			12,236,146
Repurchases of common stock - repurchase program	(110,981)		$ (44)	(110,937)
Repurchases of common stock - repurchase program (in shares)			(4,290,801)
Issuance of shares from employee equity plans	23,127		$ 37	23,090
Issuance of shares from employee equity plans (in shares)			3,484,018
Share-based compensation expense	52,972			52,972
Shares repurchased for tax withholdings on vesting of restricted stock units	(4,757)		$ (2)	(4,755)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)			(154,059)
Ending balance at Nov. 03, 2018	1,929,334	$ 49,805	$ 1,543	6,881,223	$ 0	(5,780)	(4,947,652)	$ 49,805
Ending balance (in shares) at Nov. 03, 2018			154,318,531
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	253,434						253,434
Other comprehensive income (loss)	(16,304)					(16,304)
Conversion of convertible notes into common shares	52,944		$ 16	52,928
Conversion of convertible notes into common shares (in shares)			1,585,140
Repurchases of common stock - repurchase program	(150,076)		$ (38)	(150,038)
Repurchases of common stock - repurchase program (in shares)			(3,838,466)
Issuance of shares from employee equity plans	22,947		$ 31	22,916
Issuance of shares from employee equity plans (in shares)			3,112,916
Share-based compensation expense	59,736			59,736
Shares repurchased for tax withholdings on vesting of restricted stock units	(29,059)		$ (8)	(29,051)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)			(774,271)
Ending balance at Nov. 02, 2019	$ 2,172,761		$ 1,544	6,837,714		(22,084)	(4,644,413)
Ending balance (in shares) at Nov. 02, 2019	154,403,850		154,403,850
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 361,291						361,291
Other comprehensive income (loss)	(13,274)					(13,274)
Repurchases of common stock - repurchase program	(74,535)		$ (19)	(74,516)
Repurchases of common stock - repurchase program (in shares)			(1,872,446)
Issuance of shares from employee equity plans	28,068		$ 29	28,039
Issuance of shares from employee equity plans (in shares)			2,787,011
Share-based compensation expense	67,758			67,758
Shares repurchased for tax withholdings on vesting of restricted stock units	(32,472)		$ (8)	(32,464)
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)			(755,410)
Ending balance at Oct. 31, 2020	$ 2,509,597		$ 1,546	$ 6,826,531		$ (35,358)	$ (4,283,122)
Ending balance (in shares) at Oct. 31, 2020	154,563,005		154,563,005