Comprehensive Income - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Nov. 29, 2010	Feb. 28, 2013	Feb. 29, 2012	Nov. 30, 2012	Nov. 30, 2010
Other comprehensive income , net of tax		$ 2.6	$ 3.1
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		(0.1)		(2.2)
Foreign currency translations, net of tax		2.1	2.5
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax		0		0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax		(112.0)		(112.5)
Accumulated Other Comprehensive Income (Loss), Net of Tax		(112.1)		(114.7)
Terminated and settled amount for interest rate swap related to previous Term Loan B					150
Cost to terminate and settle interest rate swap related to previous Term Loan B	$ 4.3