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INCOME TAXES - Valuation Allowance (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Valuation allowance activity |  |
Valuation allowance, beginning | $ 833 | $ 460
Tax provision | 155 | 26
Equity investment activity | 188 | 347
Valuation allowance, ending | $ 1,176 | $ 833

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- Definition Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Equity Investment + References No definition available. + Details
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Namespace Prefix: | dal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Tax Provision + References No definition available. + Details
Name: | dal_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseTaxProvision
Namespace Prefix: | dal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Valuation Allowance Rollforward + References No definition available. + Details
Name: | dal_ValuationAllowanceRollforwardRollForward
Namespace Prefix: | dal_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant