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Background And Basis Of Presentation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended9 Months Ended
Jun. 30, 2010
Sep. 30, 2011
Background And Basis Of Presentation [Abstract]  
Aggregate sale of business segment$ 100 
Minimum period of agreement for earning transition services revenues for services provided to the buyer (in months) 3
Maximum period of agreement for earning transition services revenues for services provided to the buyer (in months) 18