Indefinite-Lived Intangible Asset, Percentage Of Fair Value In Excess Of Carrying Amount

No definition available.

Name:	dal_IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount
Namespace Prefix:	dal_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Indefinite-Lived Intangible Assets And Goodwill

+ References

No definition available.

+ Details

Name:	dal_IndefiniteLivedIntangibleAssetsAndGoodwill
Namespace Prefix:	dal_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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_IndefiniteLivedIntangibleAssetsByMajorClassLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

+ References

No definition available.

+ Details

Name:	us-gaap_IndefinitelivedIntangibleAssetsAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of fair value of reporting unit in excess of carrying amount.

+ References

No definition available.

+ Details

Name:	us-gaap_ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=dal_InternationalRoutesAndSlotsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=dal_AirlineAlliancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=dal_LATAMAirlinesGroupS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=dal_DomesticSlotsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Impact of the COVID-19 Pandemic - Valuation of Goodwill and Indefinite-Lived Intangibles (Details) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Indefinite-lived Intangible Assets [Line Items]
Goodwill		$ 9,753	$ 9,781
Fair Value Excess at 2019 Testing Date			234.00%
Goodwill and indefinite-lived intangibles		15,671	$ 14,841
International routes and slots
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangibles		2,583	$ 2,583
International routes and slots \| Minimum
Indefinite-lived Intangible Assets [Line Items]
Fair Value Excess at 2019 Testing Date			15.00%
International routes and slots \| Maximum
Indefinite-lived Intangible Assets [Line Items]
Fair Value Excess at 2019 Testing Date			29.00%
Airline alliances
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangibles		1,863	$ 1,005
Airline alliances \| Minimum
Indefinite-lived Intangible Assets [Line Items]
Fair Value Excess at 2019 Testing Date			67.00%
Airline alliances \| Maximum
Indefinite-lived Intangible Assets [Line Items]
Fair Value Excess at 2019 Testing Date			576.00%
Airline alliances \| LATAM
Indefinite-lived Intangible Assets [Line Items]
Acquisition of indefinite-lived intangible asset	$ 1,200
Delta tradename
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangibles		850	$ 850
Fair Value Excess at 2019 Testing Date			185.00%
Domestic slots
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangibles		$ 622	$ 622
Domestic slots \| Minimum
Indefinite-lived Intangible Assets [Line Items]
Fair Value Excess at 2019 Testing Date			61.00%
Domestic slots \| Maximum
Indefinite-lived Intangible Assets [Line Items]
Fair Value Excess at 2019 Testing Date			181.00%