Net Income Per Share (Computation Of Basic And Diluted Net Income Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 28, 2012	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Earnings Per Share [Abstract]
Net income attributable to TIBCO Software Inc.	$ 44,549	$ 21,251	$ 8,715	$ 9,505	$ 48,788	$ 26,086	$ 26,492	$ 20,641	$ 84,020	$ 122,007	$ 112,406
Weighted-average shares of common stock used in computing basic net income per share (excluding unvested restricted stock)	160,814	160,638	160,877	161,521	160,115	159,308	160,437	161,460	160,963	160,330	161,469
Stock options									4,562	6,677	9,549
Stock awards									2,317	2,683	2,245
ESPP									6	8	9
Weighted-average shares of common stock used in computing diluted net income per share	167,758	166,999	167,507	169,130	169,284	169,165	169,477	170,866	167,848	169,698	173,272
Basic net income per share (usd per share)	$ 0.28	$ 0.13	$ 0.05	$ 0.06	$ 0.30	$ 0.16	$ 0.17	$ 0.13	$ 0.52	$ 0.76	$ 0.70
Diluted net income per share (usd per share)	$ 0.27	$ 0.13	$ 0.05	$ 0.06	$ 0.29	$ 0.15	$ 0.16	$ 0.12	$ 0.50	$ 0.72	$ 0.65