General - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Feb. 28, 2013	Feb. 29, 2012
Basis of Presentation [Line Items]
Adjustment amounts on gross basis in revenues and expenses	$ 139	$ 127
Repairs and maintenance costs	$ 225	$ 236

The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_CostOfPropertyRepairsAndMaintenance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration