Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,471,086	$ 1,458,692
Finite-Lived Intangible Assets, Accumulated Amortization	(434,317)	(378,621)
Finite-Lived Intangible Assets, Net	1,036,769	1,080,071
Intangible Assets, Gross (Excluding Goodwill)	1,534,873	1,523,085
Intangible assets, net	1,100,556	1,144,464
Trademarks [Member]
Acquired Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	62,545	63,144
Perpetual licenses [Member]
Acquired Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	1,242	1,249
Information databases [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	625,172	633,347
Finite-Lived Intangible Assets, Accumulated Amortization	(223,567)	(194,904)
Finite-Lived Intangible Assets, Net	401,605	438,443
Customer relationships [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	506,481	470,632
Finite-Lived Intangible Assets, Accumulated Amortization	(108,570)	(90,827)
Finite-Lived Intangible Assets, Net	397,911	379,805
Developed computer software [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	151,517	159,413
Finite-Lived Intangible Assets, Accumulated Amortization	(70,754)	(64,514)
Finite-Lived Intangible Assets, Net	80,763	94,899
Trademarks [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	167,211	167,179
Finite-Lived Intangible Assets, Accumulated Amortization	(22,864)	(13,300)
Finite-Lived Intangible Assets, Net	144,347	153,879
Other [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	20,705	28,121
Finite-Lived Intangible Assets, Accumulated Amortization	(8,562)	(15,076)
Finite-Lived Intangible Assets, Net	$ 12,143	$ 13,045