Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total Synopsys Stockholders’ Equity	Non-controlling Interest
Balance at Oct. 31, 2011	$ 2,101,300	$ 1,433	$ 1,521,327	$ 957,517	$ (358,032)	$ (20,945)	$ 2,101,300	$ 0
Balance (in shares) at Oct. 31, 2011		143,308
Net income	181,898			182,402			182,402	(504)
Other comprehensive income (loss), net of tax effects	5,484					5,484	5,484
Purchases of treasury stock, shares	(2,474)	(2,474)
Purchases of treasury stock, value	(40,000)	(25)	33,360		(73,335)		(40,000)
Common stock issued (in shares)	10,065	10,065
Common stock issued	181,163	101	(40,990)	(41,225)	263,277		181,163
Stock compensation expense	71,337		71,337				71,337
Non-controlling interest in an acquired company	42,789							42,789
Balance at Oct. 31, 2012	2,543,971	1,509	1,585,034	1,098,694	(168,090)	(15,461)	2,501,686	42,285
Balance (in shares) at Oct. 31, 2012		150,899
Net income	247,800			247,800			247,800
Other comprehensive income (loss), net of tax effects	(13,234)					(13,234)	(13,234)
Purchases of treasury stock, shares	(3,996)	(3,996)
Purchases of treasury stock, value	(145,016)	(40)	40		(145,016)		(145,016)
Common stock issued (in shares)	7,266	7,266
Common stock issued	129,559	73	(55,312)	(21,640)	206,438		129,559
Stock compensation expense	67,482		67,482				67,482
Acquisition of non-controlling interest	(42,285)							(42,285)
Balance at Oct. 31, 2013	2,788,277	1,542	1,597,244	1,324,854	(106,668)	(28,695)	2,788,277	0
Balance (in shares) at Oct. 31, 2013		154,169
Net income	259,124			259,124			259,124
Other comprehensive income (loss), net of tax effects	(33,394)					(33,394)	(33,394)
Purchases of treasury stock, shares	(3,092)	(3,092)
Purchases of treasury stock, value	(119,747)	(31)	31		(119,747)		(119,747)
Common stock issued (in shares)	4,888	4,888
Common stock issued	82,470	49	(62,112)	(32,386)	176,919		82,470
Stock compensation expense	79,440		79,440				79,440
Balance at Oct. 31, 2014	$ 3,056,170	$ 1,560	$ 1,614,603	$ 1,551,592	$ (49,496)	$ (62,089)	$ 3,056,170	$ 0
Balance (in shares) at Oct. 31, 2014		155,965