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Other Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Other Income [Abstract] |  |  |  |  |
Net gain on non-operating asset dispositions. | [1] | $ 3 | $ 4 | $ 97 | $ 14
Rental income |  | 29 | 34 | 90 | 96
Net periodic pension and OPEB costs |  | 12 | 12 | 31 | 28
Interest Income |  | 2 | 10 | 11 | 25
Interest income due to employment tax refund |  |  | 1 |  | 31
Non-operating environmental costs and other |  | (9) | (8) | (8) | (7)
Total |  | $ 37 | $ 53 | 221 | $ 187
Land and permanent easement sale |  |  |  | $ 69 |
[1] | The nine months ended September 30, 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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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 + Details
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