Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value (Details)

v3.8.0.1
Assets And Liabilities Measured At Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents $ 537 $ 289
Available-for-sale securities 1,054 489
Financial instrument assets 419 286
Debt 2,226 1,546
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 537 289
Available-for-sale securities 502 489
Financial instrument assets 19 16
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale securities 552  
Financial instrument assets 400 270
Debt $ 2,226 $ 1,546