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Railway Operating Revenues (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | $ 2,085,000,000 | $ 2,925,000,000 | $ 4,710,000,000 | $ 5,765,000,000 |
Revenue, payment terms |  |  | 15 days |  |
Contract assets | 0 |  | $ 0 |  | $ 0
Contract liabilities | $ 0 |  | $ 0 |  | $ 0
Accessorial Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Accessorial services percent of total railway operating revenues | 5.00% | 4.00% | 5.00% | 4.00% |
Merchandise |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | $ 1,307,000,000 | $ 1,756,000,000 | $ 2,979,000,000 | $ 3,442,000,000 |
Merchandise | Agriculture, forest and consumer products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 498,000,000 | 577,000,000 | 1,049,000,000 | 1,135,000,000 |
Merchandise | Chemicals |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 423,000,000 | 544,000,000 | 943,000,000 | 1,051,000,000 |
Merchandise | Metals and construction |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 293,000,000 | 384,000,000 | 660,000,000 | 754,000,000 |
Merchandise | Automotive |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 93,000,000 | 251,000,000 | 327,000,000 | 502,000,000 |
Intermodal |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | 569,000,000 | 701,000,000 | 1,224,000,000 | 1,420,000,000 |
Coal |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from contract with customer | $ 209,000,000 | $ 468,000,000 | $ 507,000,000 | $ 903,000,000 |

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044 + Details
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