Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details)

v3.2.0.727
Assets And Liabilities Measured At Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents $ 2,420 $ 2,147
Short term marketable securities 845 889
Available-for-sale securities 1,360 1,220
Available-for-sale Securities, Noncurrent 1,405 1,224
Debt 2,635 2,574
Fair Value, Inputs (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 2,420 2,147
Short term marketable securities 249 277
Available-for-sale securities 1,351 1,203
Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short term marketable securities 596 612
Available-for-sale securities 9 17
Debt $ 2,635 $ 2,574