Earnings Per Share And Stock Issuances (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Feb. 29, 2012
Earnings Per Share And Stock Issuances [Abstract]
Remaining authorized share repurchase amount	$ 227.0
Authorized share repurchase amount	$ 400.0

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

No definition available.

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