Balance Sheet Accounts - Schedule of Other Noncurrent Assets, Net (Detail) (USD $) In Millions, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013
Other Noncurrent Assets [Line Items]
Recoverable from the U.S. government for restructuring costs	$ 34.9	$ 13.3
Deferred financing costs	19.3	18.3
Recoverable from the U.S. government for conditional asset retirement obligations	17.1	15.6
Grantor trust	11.6	11.4
Other	2.4	4.1
Other noncurrent assets, net	92.1	72.7
UTC [Member]
Other Noncurrent Assets [Line Items]
Indemnification receivable from UTC	$ 6.8	$ 10.0