Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]
Net loss	$ (2.1)	$ (14.0)
Other comprehensive income:
Amortization of net actuarial losses, net of income taxes	7.5	22.9
Comprehensive income	$ 5.4	$ 8.9