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Revenue - Passenger Revenue Breakout (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disaggregation of Revenue |  |  |
Operating Revenue | $ 22,428 | $ 21,965 | $ 21,146
Passenger Revenue Non Loyalty |  |  |
Disaggregation of Revenue |  |  |
Operating Revenue | 17,578 | 17,506 | 16,934
Passenger Loyalty Air Transportation |  |  |
Disaggregation of Revenue |  |  |
Operating Revenue | 2,487 | 2,307 | 2,263
Passenger Ancillary Sold Separately |  |  |
Disaggregation of Revenue |  |  |
Operating Revenue | 711 | 642 | 566
Passenger |  |  |
Disaggregation of Revenue |  |  |
Operating Revenue | $ 20,776 | $ 20,455 | $ 19,763

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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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