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Supplemental Income Statement Information (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Other Income and Expenses [Abstract] |  |  |  |  |  |  |
Interest expense |  |  |  |  | $ 488 | $ 529 | $ 448
Interest income |  |  |  |  | (26) | (29) | (80)
Pension and postretirement net periodic benefit cost (benefit) |  |  |  |  | (297) | (134) | 1
Loss on deconsolidation of Venezuelan subsidiary |  |  |  |  | 0 | 0 | 162
Total |  |  |  |  | 165 | 366 | 531
Debt instrument |  |  |  |  |  |  |
Loss on extinguishment of debt |  | $ 10 |  |  |  | 10 |
Loss on deconsolidation of Venezuelan subsidiary |  |  |  |  | 0 | $ 0 | 162
Pension settlement charge |  |  | $ 32 |  |  |  |
Venezuela |  |  |  |  |  |  |
Other Income and Expenses [Abstract] |  |  |  |  |  |  |
Loss on deconsolidation of Venezuelan subsidiary |  |  |  | $ 162 |  |  | 162
Debt instrument |  |  |  |  |  |  |
Loss on deconsolidation of Venezuelan subsidiary |  |  |  | $ 162 |  |  | $ 162
Fixed rate medium term note due 2022 |  |  |  |  |  |  |
Debt instrument |  |  |  |  |  |  |
Loss on extinguishment of debt | $ 11 |  |  |  | $ 11 |  |

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