Interest Income and Other Non-Operating Income, net (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Other Income and Expenses [Abstract] | |||
| Non-service pension and OPEB income | $ 1,665 | $ 1,316 | $ 1,262 |
| Interest income | 335 | 266 | 182 |
| Licensing agreements income | 296 | 74 | 94 |
| Revaluation of investments | 258 | (56) | 0 |
| Other | 42 | 45 | 65 |
| Total interest income and other non-operating income, net | $ 2,596 | $ 1,645 | $ 1,603 |