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LEASES - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) lease aircraft transaction airport
Lessee, Lease, Description [Line Items] |
Leases that have not yet commenced | $ | $ 242
Aircraft sale leaseback |
Lessee, Lease, Description [Line Items] |
Sale leaseback transactions | $ | $ 2,800
Number of aircraft in sale-leaseback transactions | aircraft | 85
Number of sale-leaseback transactions that did not qualify as sale | transaction | 74
Number of sale-leaseback transactions that qualified as sale | transaction | 11
Minimum |
Lessee, Lease, Description [Line Items] |
Leases that have not yet commenced, term of contract | 7 years
Maximum |
Lessee, Lease, Description [Line Items] |
Leases that have not yet commenced, term of contract | 10 years
Aircraft |
Lessee, Lease, Description [Line Items] |
Number of leases | 221
Number of finance leases | 105
Number of operating leases | 116
Lease component of purchase agreements, number of aircraft | aircraft | 115
Aircraft | Minimum |
Lessee, Lease, Description [Line Items] |
Remaining term of operating leases | 1 month
Remaining term of finance leases | 1 month
Aircraft | Maximum |
Lessee, Lease, Description [Line Items] |
Remaining term of operating leases | 13 years
Remaining term of finance leases | 13 years
Airport Facilities |
Lessee, Lease, Description [Line Items] |
Number of airports with facility space under lease | airport | 300
Airport Facilities | Minimum |
Lessee, Lease, Description [Line Items] |
Remaining term of operating leases | 1 month
Airport Facilities | Maximum |
Lessee, Lease, Description [Line Items] |
Remaining term of operating leases | 29 years
Other Ground Property and Equipment | Minimum |
Lessee, Lease, Description [Line Items] |
Remaining term of operating leases | 1 month
Remaining term of finance leases | 1 month
Other Ground Property and Equipment | Maximum |
Lessee, Lease, Description [Line Items] |
Remaining term of operating leases | 7 years
Remaining term of finance leases | 7 years

X
- Definition Finance Lease, Number Of Leases + References No definition available. + Details
Name: | dal_FinanceLeaseNumberOfLeases
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Lease Component Of Purchase Agreements, Number Of Aircraft + References No definition available. + Details
Name: | dal_LeaseComponentOfPurchaseAgreementsNumberOfAircraft
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Lease, Number Of Leases + References No definition available. + Details
Name: | dal_LeaseNumberOfLeases
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of lessee's finance leases and operating leases not yet commenced. + References No definition available. + Details
Name: | dal_LesseeFinanceLeaseAndOperatingLeaseLeaseNotYetCommencedAmount
Namespace Prefix: | dal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term of lessee's finance leases and operating leases not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | dal_LesseeFinanceLeaseAndOperatingLeaseLeaseNotYetCommencedTermOfContract
Namespace Prefix: | dal_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Aircraft In Sale-Leaseback Transactions + References No definition available. + Details
Name: | dal_NumberOfAircraftInSaleLeasebackTransactions
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Sale-Leaseback Transactions, Not Qualify As Sale + References No definition available. + Details
Name: | dal_NumberOfSaleLeasebackTransactionsNotQualifyAsSale
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Sale-Leaseback Transactions, Qualify As Sale + References No definition available. + Details
Name: | dal_NumberOfSaleLeasebackTransactionsQualifyAsSale
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating Lease, Number Of Airports With Facility Space Under Lease + References No definition available. + Details
Name: | dal_OperatingLeaseNumberOfAirportsWithFacilitySpaceUnderLease
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Operating Lease, Number Of Leases + References No definition available. + Details
Name: | dal_OperatingLeaseNumberOfLeases
Namespace Prefix: | dal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Proceeds From Sale Leaseback + References No definition available. + Details
Name: | dal_ProceedsFromSaleLeaseback
Namespace Prefix: | dal_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Remaining lease term of finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_SaleLeasebackTransactionDescriptionAxis=dal_AircraftSaleLeasebackMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=dal_AircraftMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=dal_AirportFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=dal_GroundPropertyAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |