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Interest Income and Other Non-Operating Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Income and Expenses [Abstract]      
Non-service pension and OPEB income $ 797 $ 1,665 $ 1,316
Interest income 429 335 266
Licensing agreements income 165 296 74
Revaluation of investments 80 258 (56)
Other (2) 42 45
Total interest income and other non-operating income, net $ 1,469 $ 2,596 $ 1,645