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Revenues - Schedule of Revenues Disaggregated by Lines of Business (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 2,876 | $ 2,869
Total Merchandise |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1,779 | 1,839
Chemicals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 557 | 566
Agricultural and Food Products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 307 | 332
Automotive |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 304 | 316
Forest Products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 195 | 192
Metals and Equipment |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 186 | 190
Fertilizers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 116 | 129
Minerals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 114 | 114
Total Coal |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 503 | 522
Domestic Coal |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 272 | 330
Export Coal |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 231 | 192
Total Intermodal |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 449 | 434
Domestic Intermodal |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 294 | 291
International Intermodal |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 155 | 143
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 145 | $ 74

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 32 -Paragraph 2A -URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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