Earnings Per Share and Stock Issuances-Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
May 31, 2013	May 31, 2013
Earnings Per Share, Basic and Diluted [Abstract]
Stock repurchase program, remaining authorized repurchase amount		$ 45
Stock repurchase program, authorized amount	$ 400	$ 400

The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration