Annual report pursuant to Section 13 and 15(d)

Assets And Liabilities Measured At Fair Value (Details)

v3.10.0.1
Assets And Liabilities Measured At Fair Value (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Assets and Liabilities Measured at Fair Value    
Debt and equity securities $ 1,195 $ 1,047
Estimate of Fair Value Measurement [Member]    
Assets and Liabilities Measured at Fair Value    
Cash equivalents 231 804
Debt and equity securities 1,195 1,047
Financial instrument assets 280 369
Debt 2,487 2,115
Level 1    
Assets and Liabilities Measured at Fair Value    
Cash equivalents 231 804
Debt and equity securities 228 467
Financial instrument assets 21 19
Level 2    
Assets and Liabilities Measured at Fair Value    
Debt and equity securities 967 580
Financial instrument assets 259 350
Debt $ 2,487 $ 2,115