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Note 13 - Fair Value Measurements (Details) - Major Categories of Financial Assets and Liabilities Measured on a Recurring Basis - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Non-current assets:    
Other assets $ 1,551 $ 1,722
Current liabilities:    
Other accrued liabilities (1) 956 1,291
Non-current liabilities:    
Other liabilities (1)(3) 2,165 2,046
Current Assets [Member]    
Current assets:    
Short-term investments 573 759
Other current assets [1] 549 687
Non Current Assets [Member]    
Non-current assets:    
Other assets [1],[2] 1,088 1,330
Current Liabilities [Member]    
Current liabilities:    
Other liabilities [1]   44
Current liabilities:    
Other accrued liabilities (1) [1],[3] 74  
Non Current Liabilities [Member]    
Current liabilities:    
Other liabilities [1]   15
Non-current liabilities:    
Other liabilities (1)(3) [1],[3] 110  
Fair Value, Inputs, Level 1 [Member] | Current Assets [Member]    
Current assets:    
Short-term investments 513 759
Fair Value, Inputs, Level 2 [Member] | Current Assets [Member]    
Current assets:    
Short-term investments 60  
Other current assets [1] 549 687
Fair Value, Inputs, Level 2 [Member] | Non Current Assets [Member]    
Non-current assets:    
Other assets [1],[2] 643 885
Fair Value, Inputs, Level 2 [Member] | Current Liabilities [Member]    
Current liabilities:    
Other liabilities [1]   44
Current liabilities:    
Other accrued liabilities (1) [1],[3] 74  
Fair Value, Inputs, Level 2 [Member] | Non Current Liabilities [Member]    
Current liabilities:    
Other liabilities [1]   15
Non-current liabilities:    
Other liabilities (1)(3) [1],[3] 100  
Fair Value, Inputs, Level 3 [Member] | Non Current Assets [Member]    
Non-current assets:    
Other assets [1],[2] 445 $ 445
Fair Value, Inputs, Level 3 [Member] | Non Current Liabilities [Member]    
Non-current liabilities:    
Other liabilities (1)(3) [1],[3] $ 10  
[1] Derivative assets and liabilities include foreign exchange forward and zero-cost collar contracts, and interest rate swaps which are measured using observable quoted prices for similar assets and liabilities.
[2] Other assets include asset-backed securities which are measured using observable quoted prices for similar assets and contingent consideration assets which are measured by applying an option pricing model using projected future revenue.
[3] Other liabilities include Level 3 contingent consideration payables which are measured by applying an option pricing model using projected future revenues.