Debt - Delayed Draw Term Loan Credit Facility and 11.75% Secured Senior Notes (Details) - American Airlines, Inc. - Senior Notes 11.75% Due 2025 - Senior Notes	1 Months Ended	12 Months Ended
Jun. 30, 2020 USD ($)	Dec. 31, 2020
Debt Instrument [Line Items]
Fixed interest rate per annum	11.75%
Aggregate principal issued	$ 2,500,000,000
Long term debt, price, percentage of par value	99.00%
Redemption price percentage	100.00%
Debt instrument, covenant, debt service coverage ratio	1.6
Additional Special Interest required to pay (in percentage)		0.020
Debt Instrument, Redemption Period, In the Event of Specified Change of Control
Debt Instrument [Line Items]
Redemption price percentage	101.00%

Debt Instrument, Additional Interest Rate If Collateral Coverage Ratio Not Met

No definition available.

Name:	aal_DebtInstrumentAdditionalInterestRateIfCollateralCoverageRatioNotMet
Namespace Prefix:	aal_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant, Debt Service Coverage Ratio

+ References

No definition available.

+ Details

Name:	aal_DebtInstrumentCovenantDebtServiceCoverageRatio
Namespace Prefix:	aal_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Long Term Debt, Price, Percentage Of Par Value

+ References

No definition available.

+ Details

Name:	aal_LongTermDebtPricePercentageOfParValue
Namespace Prefix:	aal_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aal_SeniorNotes11.75Due2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=aal_DebtInstrumentRedemptionPeriodUponChangeOfControlMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: