Segment Data And Related Information (Narrative) (Details) (International [Member])	Sep. 30, 2012 country
International [Member]
Segment Reporting Information [Line Items]
Number of countries company operates in	120

The number of countries in which the entity operates as of balance sheet date.

No definition available.

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant