Balance Sheet Accounts - Schedule of Other Noncurrent Assets, Net (Detail) (USD $) In Millions, unless otherwise specified	May 31, 2014	Nov. 30, 2013
Other Noncurrent Assets [Line Items]
Recoverable from the U.S. government for restructuring costs	$ 27.0	$ 13.3
Deferred financing costs	20.1	18.3
Recoverable from the U.S. government for conditional asset retirement obligations	16.6	15.6
Grantor trust	11.9	11.4
Other	3.4	4.1
Other noncurrent assets, net	85.8	72.7
UTC [Member]
Other Noncurrent Assets [Line Items]
Indemnification receivable from UTC	$ 6.8	$ 10.0