Interest Income and Other Non-Operating Income (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Other Income and Expenses [Abstract] | |||
| Non-service pension and OPEB income | $ 1,095 | $ 797 | $ 1,665 |
| Interest income | 241 | 429 | 335 |
| Licensing agreements income | 211 | 165 | 296 |
| Revaluation of investments | 265 | 80 | 258 |
| Other | 73 | (2) | 42 |
| Total interest income and other non-operating income, net | $ 1,885 | $ 1,469 | $ 2,596 |