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REVENUE RECOGNITION - Loyalty Program Liability (Details) - Loyalty program - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Loyalty program activity
Current and noncurrent deferred revenue, beginning	$ 8,826	$ 8,420
Miles earned	1,152	1,021
Miles redeemed for air travel	(940)	(844)
Miles redeemed for non-air travel and other	(60)	(56)
Current and noncurrent deferred revenue, ending	$ 8,978	$ 8,541

X

- Definition

Loyalty Program Liability Activity

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loyalty Program Liability, Mileage Credits Earned

+ References

No definition available.

+ Details

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

X

- Definition

Loyalty Program Liability, Non-Travel Mileage Credits Redeemed

+ References

No definition available.

+ Details

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Namespace Prefix:	dal_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Loyalty Program Liability, Travel Mileage Credits Redeemed

+ References

No definition available.

+ Details

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Namespace Prefix:	dal_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-8

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479837/606-10-45-2

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Period Type:	instant

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- Details

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Namespace Prefix:
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Balance Type:
Period Type: