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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Information about Goodwill and Other Intangible Assets | The following table presents information about the Company's goodwill and other intangible assets at December 31 (in millions):
|  | 2018 |  | 2017
Item |  | Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Goodwill |  | $ | 4,523 |  |  |  |  | $ | 4,523 |  |  |
Finite-lived intangible assets |  |  |  |  |  |  |  |
Frequent flyer database |  | $ | 1,177 |  |  | $ | 884 |  |  | $ | 1,177 |  |  | $ | 832 |
Hubs |  | 145 |  |  | 97 |  |  | 145 |  |  | 89 |
Contracts |  | 120 |  |  | 106 |  |  | 121 |  |  | 103 |
Patents and tradenames |  | 108 |  |  | 108 |  |  | 108 |  |  | 108 |
Airport slots and gates |  | 97 |  |  | 97 |  |  | 97 |  |  | 97 |
Other |  | 109 |  |  | 88 |  |  | 109 |  |  | 84 |
Total |  | $ | 1,756 |  |  | $ | 1,380 |  |  | $ | 1,757 |  |  | $ | 1,313 |
Indefinite-lived intangible assets |  |  |  |  |  |  |  |
Route authorities |  | $ | 1,240 |  |  |  |  | $ | 1,562 |  |  |
Airport slots and gates |  | 546 |  |  |  |  | 536 |  |  |
Tradenames and logos |  | 593 |  |  |  |  | 593 |  |  |
Alliances |  | 404 |  |  |  |  | 404 |  |  |
Total |  | $ | 2,783 |  |  |  |  | $ | 3,095 |  |  |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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