Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Statement of Comprehensive Income [Abstract]
Other comprehensive income, changes in instrument specific credit risk, tax benefit	$ 4.3
Minimum pension liability adjustments, tax	$ 0.3	$ 4.2	$ 0.5