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Commitments and Contingent Liabilities Commitments and Contingencies - Loss Contingency (Details)
$ in Millions
9 Months Ended
Sep. 30, 2015
USD ($)
Loss Contingencies [Line Items]  
Loss Contingency Accrual, Payments $ 6.0
Loss Contingency Accrual 6.0
Loss Contingency, Receivable 6.0
Audience, Inc.  
Loss Contingencies [Line Items]  
Loss Contingency, Accrual, Current $ 0.5