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Accounting Changes
6 Months Ended
Jun. 30, 2011
Accounting Changes [Abstract]  
ACCOUNTING CHANGES
(B) ACCOUNTING CHANGES
     In September 2009, the Financial Accounting Standards Board (FASB) issued accounting guidance which amends the criteria for allocating a contract’s consideration to individual services or products in multiple-deliverable arrangements. The guidance requires that the best estimate of selling price be used when vendor specific objective or third-party evidence for deliverables cannot be determined. This guidance is effective for us for revenue arrangements entered into or materially modified after December 31, 2010. The adoption of this accounting guidance did not have a material impact on our consolidated financial position, results of operations or cash flows.