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Fair Value of Assets and Liabilities (Details) (USD $)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities$ 0$ 0
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Deposits held in money market funds58,000,000[1]58,000,000[1]
Available for sale securities10,000,000[2]10,000,000[2]
Foreign exchange forward contracts7,000,000[3]7,000,000[3]
Total assets75,000,00075,000,000
Foreign exchange forward contracts2,000,000[4]2,000,000[4]
Total liabilities2,000,0002,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Deposits held in money market funds58,000,000[1]58,000,000[1]
Available for sale securities10,000,000[2]10,000,000[2]
Foreign exchange forward contracts0[3]0[3]
Total assets68,000,00068,000,000
Foreign exchange forward contracts0[4]0[4]
Total liabilities00
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Deposits held in money market funds0[1]0[1]
Available for sale securities0[2]0[2]
Foreign exchange forward contracts7,000,000[3]7,000,000[3]
Total assets7,000,0007,000,000
Foreign exchange forward contracts2,000,000[4]2,000,000[4]
Total liabilities2,000,0002,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Deposits held in money market funds0[1]0[1]
Available for sale securities0[2]0[2]
Foreign exchange forward contracts0[3]0[3]
Total assets00
Foreign exchange forward contracts0[4]0[4]
Total liabilities00
Fair Value, Measurements, Nonrecurring [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Adjustments$ 0$ 0
[1]Included in Cash and cash equivalents in the Condensed Consolidated Balance Sheet.
[2]Included in Other assets in the Condensed Consolidated Balance Sheet.
[3]Included in Accounts receivable, net in the Condensed Consolidated Balance Sheet.
[4]Included in Other current liabilities in the Condensed Consolidated Balance Sheet.