Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2014	Nov. 30, 2013
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,415,868	$ 1,458,692
Finite-Lived Intangible Assets, Accumulated Amortization	(402,854)	(378,621)
Finite-Lived Intangible Assets, Net	1,013,014	1,080,071
Intangible Assets, Gross (Excluding Goodwill)	1,479,937	1,523,085
Intangible assets, net	1,077,083	1,144,464
Trademarks [Member]
Acquired Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	62,792	63,144
Perpetual licenses [Member]
Acquired Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	1,277	1,249
Information databases [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	616,946	633,347
Finite-Lived Intangible Assets, Accumulated Amortization	(209,911)	(194,904)
Finite-Lived Intangible Assets, Net	407,035	438,443
Customer relationships [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	460,277	470,632
Finite-Lived Intangible Assets, Accumulated Amortization	(99,959)	(90,827)
Finite-Lived Intangible Assets, Net	360,318	379,805
Non-compete agreements [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,595	2,717
Finite-Lived Intangible Assets, Accumulated Amortization	(1,871)	(1,653)
Finite-Lived Intangible Assets, Net	724	1,064
Developed computer software [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	151,700	159,413
Finite-Lived Intangible Assets, Accumulated Amortization	(66,452)	(64,514)
Finite-Lived Intangible Assets, Net	85,248	94,899
Trademarks [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	166,834	167,179
Finite-Lived Intangible Assets, Accumulated Amortization	(19,288)	(13,300)
Finite-Lived Intangible Assets, Net	147,546	153,879
Other [Member]
Acquired Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	17,516	25,404
Finite-Lived Intangible Assets, Accumulated Amortization	(5,373)	(13,423)
Finite-Lived Intangible Assets, Net	$ 12,143	$ 11,981