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, 2021
Dec. 31, 2020
Assets and Liabilities Measured at Fair Value    
Cash equivalents $ 2,526 $ 2,586
Debt and equity securities 413 266
Financial instrument assets 493 424
Debt 4,611 4,545
Financial instrument liabilities 99 106
Level 1    
Assets and Liabilities Measured at Fair Value    
Cash equivalents 2,526 2,586
Debt and equity securities 383 181
Financial instrument assets 94 84
Financial instrument liabilities 25  
Level 2    
Assets and Liabilities Measured at Fair Value    
Debt and equity securities 30 85
Financial instrument assets 399 340
Debt 4,611 4,545
Financial instrument liabilities $ 74 $ 106