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Other Income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other Income [Abstract] |  |  |  |
Rental income | $ 123 |  | $ 124 | $ 122
Net gain on non-operating asset dispositions. | 115 | [1] | 20 | 30
Net periodic pension and OPEB costs | 44 |  | 37 | 13
Interest income | 12 |  | 32 | 30
Interest income due to employment tax refund |  |  | 31 |
Early extinguishment of debt |  |  | (2) | (85)
Non-operating environmental costs and other | (7) |  | 1 | (16)
Total | 287 |  | $ 243 | $ 94
Land and permanent easement sale | $ 69 |  |  |
[1] | 2020 includes a $69 million gain from a land and permanent easement sale to the Illinois State Toll Highway Authority.

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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Major component is expenses associated with environmental cost on nonoperating property. + References No definition available. + Details
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