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REVENUE RECOGNITION - Narrative (Details) - USD ($) $ in Billions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue recognized that was previously deferred	$ 5.7	$ 5.6
Cash sales of mileage credits	$ 4.0	$ 3.6
Redemption period for majority of new miles (in years)	2 years

X

- Definition

Mileage Credit Redemption, Majority Of New Miles Redemption Period

+ References

No definition available.

+ Details

Name:	dal_MileageCreditRedemptionMajorityOfNewMilesRedemptionPeriod
Namespace Prefix:	dal_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Sales Of Mileage Credits

+ References

No definition available.

+ Details

Name:	dal_SalesOfMileageCredits
Namespace Prefix:	dal_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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