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Revenues - Revenues Disaggregated by Lines of Business (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 3,061 | $ 3,102 | $ 6,074 | $ 5,978
Total Merchandise |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,944 | 1,907 | 3,823 | 3,686
Chemicals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 591 | 588 | 1,177 | 1,145
Agricultural and Food Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 358 | 327 | 702 | 634
Automotive |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 329 | 330 | 640 | 634
Forest Products |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 223 | 215 | 439 | 410
Metals and Equipment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 187 | 198 | 376 | 384
Minerals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 144 | 137 | 267 | 251
Fertilizers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 112 | 112 | 222 | 228
Coal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 557 | 569 | 1,095 | 1,072
Intermodal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 436 | 490 | 864 | 939
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 124 | $ 136 | $ 292 | $ 281

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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