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Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 31, 2016
May 31, 2015
May 31, 2016
May 31, 2015
Nov. 30, 2015
Acquired Intangible Assets [Line Items]          
Amortization expense $ 39,800 $ 32,800 $ 76,800 $ 63,800  
Finite-Lived Intangible Assets, Gross 1,767,021   1,767,021   $ 1,401,742
Finite-Lived Intangible Assets, Accumulated Amortization (504,311)   (504,311)   (445,648)
Finite-Lived Intangible Assets, Net 1,262,710   1,262,710   956,094
Intangible Assets, Gross (Excluding Goodwill) 1,824,732   1,824,732   1,460,339
Intangible assets, net 1,320,421   1,320,421   1,014,691
Information databases [Member]          
Acquired Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 644,957   644,957   595,219
Finite-Lived Intangible Assets, Accumulated Amortization (253,299)   (253,299)   (233,729)
Finite-Lived Intangible Assets, Net 391,658   391,658   361,490
Customer relationships [Member]          
Acquired Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 847,600   847,600   540,467
Finite-Lived Intangible Assets, Accumulated Amortization (160,367)   (160,367)   (135,352)
Finite-Lived Intangible Assets, Net 687,233   687,233   405,115
Developed computer software [Member]          
Acquired Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 85,228   85,228   84,918
Finite-Lived Intangible Assets, Accumulated Amortization (40,593)   (40,593)   (35,988)
Finite-Lived Intangible Assets, Net 44,635   44,635   48,930
Trademarks [Member]          
Acquired Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 173,954   173,954   166,301
Finite-Lived Intangible Assets, Accumulated Amortization (43,998)   (43,998)   (34,777)
Finite-Lived Intangible Assets, Net 129,956   129,956   131,524
Indefinite-Lived Intangible Assets (Excluding Goodwill) 57,711   57,711   58,597
Other [Member]          
Acquired Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 15,282   15,282   14,837
Finite-Lived Intangible Assets, Accumulated Amortization (6,054)   (6,054)   (5,802)
Finite-Lived Intangible Assets, Net $ 9,228   $ 9,228   $ 9,035