Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value (Details)

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Assets And Liabilities Measured At Fair Value (Details) - Recurring - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Assets and Liabilities Measured at Fair Value    
Cash equivalents $ 354 $ 231
Debt and equity securities 361 1,195
Financial instrument assets 320 280
Debt 2,723 2,487
Level 1    
Assets and Liabilities Measured at Fair Value    
Cash equivalents 354 231
Debt and equity securities 263 228
Financial instrument assets 28 21
Level 2    
Assets and Liabilities Measured at Fair Value    
Debt and equity securities 98 967
Financial instrument assets 292 259
Debt $ 2,723 $ 2,487