Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Income Statement [Abstract]
Operating revenues, related party	$ 1.3	$ 1.3	$ 2.6	$ 2.6
Operating costs and expenses, related party	$ 2.2	$ 1.7	$ 4.2	$ 3.1