Stockholders' Equity (Share Repurchase Authorizations And Cumulative Share Repurchases) (Details) shares in Millions	May. 31, 2015 shares
Stockholders' Equity Note [Abstract]
Share repurchase authorizations (shares)	187.4
Cumulative shares repurchased (shares)	182.0

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant