Goodwill and Other Intangible Assets - Goodwill (Detail) $ in Thousands	6 Months Ended
	May 31, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 1,640,653
Translation adjustments	2,618
Goodwill, Ending Balance	1,643,271
Capital Markets [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,637,653
Goodwill, Ending Balance	1,640,271
Asset Management Income [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	3,000
Goodwill, Ending Balance	$ 3,000