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Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Statement of Stockholders' Equity [Abstract] |  |
Treasury shares withheld for payment of taxes, weighted average price per share (USD per share) | $ 49.75 | $ 55.08

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- Definition The weighted average price per treasury share withheld for payment of taxes. + References No definition available. + Details
Name: | dal_WeightedAveragePricePerTreasuryShareWithheldForTaxes
Namespace Prefix: | dal_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration