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v3.19.3.a.u2

Geographic Information (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) destination | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) destination | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Summarization of operating revenues by geographic regions |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ | $ 2,031 | $ 2,086 | $ 2,105 | $ 1,871 | $ 1,968 | $ 2,008 | $ 1,928 | $ 1,754 | $ 8,094 | $ 7,658 | $ 7,012
Domestic [Member] |  |  |  |  |  |  |  |  |  |  |
Summarization of operating revenues by geographic regions |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ |  |  |  |  |  |  |  |  | 5,633 | 5,386 | 4,999
Latin America [Member] |  |  |  |  |  |  |  |  |  |  |
Summarization of operating revenues by geographic regions |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ |  |  |  |  |  |  |  |  | $ 2,461 | $ 2,272 | $ 2,013
Latin America Destination [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number Of Destinations | destination | 31 |  |  |  |  |  |  |  | 31 |  |
PUERTO RICO |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number Of Destinations | destination | 3 |  |  |  |  |  |  |  | 3 |  |
U.S Virgin Islands [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number Of Destinations | destination | 1 |  |  |  |  |  |  |  | 1 |  |

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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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