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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Fair Value Measurements) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Marketable Securities [Line Items]                
Cash Equivalents, Fair Value $ 1,825 $ 5,051            
Available-for-sale securities, Fair value 6,502 6,203            
Marketable securities, Fair value 6,545 6,272 $ 6,065 $ 5,909 $ 5,592 $ 6,698 $ 6,769 $ 5,392
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value at January 1, Asset 446 511            
Fair value at December 31, Asset 364 446            
Certificates of Deposit [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value 804 896            
Corporate Debt Securities [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value 5,638 5,259            
Equity Funds [Member]                
Marketable Securities [Line Items]                
Marketable securities, Fair value 92 94            
Fixed Income Funds [Member]                
Marketable Securities [Line Items]                
Marketable securities, Fair value 11 11            
Auction Rate Securities [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value   12            
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value at January 1, Asset 12 12            
Realized losses (2)              
Sales (7)              
Changes in fair value (3)              
Fair value at December 31, Asset   12            
Equity investments [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value 60 36            
Interest Rate Swap [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, assets 31 46            
Total derivatives at fair value, liabilities (1) (3)            
Forward Starting Interest Rate Swap Contracts [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, assets 15              
Total derivatives at fair value, liabilities (7)              
Foreign Exchange Forward [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, assets 50 118            
Total derivatives at fair value, liabilities (10)              
Written Option Liability [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, liabilities   (198)            
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value at January 1, Liability (198) (162)            
Settlements and other 75              
Changes in fair value 123 (36)            
Fair value at December 31, Liability   (198)            
Contingent Consideration Liability [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, liabilities   (8)            
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Fair value at January 1, Liability (8) (8)            
Changes in fair value 8              
Fair value at December 31, Liability   (8)            
Fair Value Level 1 [Member] | Equity investments [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value 60 36            
Fair Value Level 2 [Member]                
Marketable Securities [Line Items]                
Cash Equivalents, Fair Value 1,825 5,051            
Fair Value Level 2 [Member] | Certificates of Deposit [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value 804 896            
Fair Value Level 2 [Member] | Corporate Debt Securities [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value 5,638 5,259            
Fair Value Level 2 [Member] | Equity Funds [Member]                
Marketable Securities [Line Items]                
Marketable securities, Fair value 92 94            
Fair Value Level 2 [Member] | Fixed Income Funds [Member]                
Marketable Securities [Line Items]                
Marketable securities, Fair value 11 11            
Fair Value Level 2 [Member] | Interest Rate Swap [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, assets 31 46            
Total derivatives at fair value, liabilities (1) (3)            
Fair Value Level 2 [Member] | Forward Starting Interest Rate Swap Contracts [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, assets 15              
Total derivatives at fair value, liabilities (7)              
Fair Value Level 2 [Member] | Foreign Exchange Forward [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, assets 50 118            
Total derivatives at fair value, liabilities $ (10)              
Fair Value Level 3 [Member] | Auction Rate Securities [Member]                
Marketable Securities [Line Items]                
Available-for-sale securities, Fair value   12            
Fair Value Level 3 [Member] | Written Option Liability [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, liabilities   (198)            
Fair Value Level 3 [Member] | Contingent Consideration Liability [Member]                
Marketable Securities [Line Items]                
Total derivatives at fair value, liabilities   $ (8)