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Fair Value Measurements - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Available for sale investments, short-term $ 27,000,000   $ 27,000,000   $ 67,000,000
Available for sale investments, long-term 123,000,000   123,000,000   133,000,000
Gross unrealized gains 1,000,000   1,000,000   1,000,000
Gross unrealized losses 1,000,000   1,000,000   1,000,000
Net gains (losses) from foreign currency forward contracts (8,000,000) 38,000,000 (16,000,000) 51,000,000  
Foreign Exchange Forward Contracts
         
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Notional amount of foreign currency derivatives 892,000,000   892,000,000    
Recurring Basis | Foreign Exchange Forward Contracts
         
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Foreign currency forward contracts, Assets         2,225,000
Foreign currency forward contracts, Liability 11,719,000   11,719,000    
Balance held by majority-owned subsidiaries
         
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Time deposits held by company's majority-owned subsidiaries $ 263,000,000   $ 263,000,000   $ 283,000,000