Commitments, Contingencies and Guarantees - Additional Information (Details) shares in Millions		1 Months Ended	12 Months Ended
	Jun. 15, 2018 USD ($)	Jun. 30, 2015 lawsuit	Dec. 31, 2019 USD ($) Employees Aircraft aircraft_engine security_screening_lane shares	May 31, 2019	Dec. 31, 2018 USD ($)
Long-term Purchase Commitment [Line Items]
Airport development, amount			$ 1,600,000,000
Airport redevelopment, number of security screening lanes | security_screening_lane			16
Airport redevelopment, costs incurred and capitalized			$ 98,000,000
Number of aircraft owned through financing under EETCs | Aircraft			382
Number of aircraft leased through financing under EETCs | Aircraft			69
Number of spare aircraft engines owned through financing under EETCs | aircraft_engine			79
Long-term debt			$ 23,856,000,000		$ 24,001,000,000
Operating lease liabilities			9,129,000,000		9,556,000,000
Letters of credit outstanding and surety bonds, amount			$ 572,000,000
Shares reserved for issuance in Disputed Claims Reserve (in shares) | shares			7
Number of putative class action lawsuits | lawsuit		100
Settlement amount	$ 45,000,000
Number of full-time equivalent employees | Employees			133,700
Percentage of employees covered by collective bargaining agreements with various labor unions			85.00%
Percentage of employees covered by collective bargaining agreements that will become amendable within one year			22.00%
Regional Carrier [Member]
Long-term Purchase Commitment [Line Items]
Number of full-time equivalent employees | Employees			29,500
EETC Leveraged Lease Financings [Member]
Long-term Purchase Commitment [Line Items]
Operating lease liabilities			$ 177,000,000
Special Facility Revenue Bonds [Member]
Long-term Purchase Commitment [Line Items]
Operating lease liabilities			321,000,000
Guarantor obligations, maximum exposure, undiscounted			589,000,000
Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			22,606,000,000		22,751,000,000
Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			1,250,000,000		1,250,000,000
Enhanced Equipment Trust Certificates (EETC) [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			11,933,000,000		11,648,000,000
Special Facility Revenue Bonds [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			754,000,000		798,000,000
Guarantor obligations, maximum exposure, undiscounted			725,000,000
Credit Facilities And Certain EETC Financings [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			8,100,000,000
Senior Notes 4.625% Due in 2020 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 500,000,000		500,000,000
Fixed interest rate per annum			4.625%
Senior Notes 5.000% Due 2022 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 750,000,000		0
Fixed interest rate per annum			5.00%	5.00%
American Airlines, Inc. [Member]
Long-term Purchase Commitment [Line Items]
Airport development, amount			$ 1,600,000,000
Airport redevelopment, number of security screening lanes | security_screening_lane			16
Airport redevelopment, costs incurred and capitalized			$ 98,000,000
Number of aircraft owned through financing under EETCs | Aircraft			382
Number of aircraft leased through financing under EETCs | Aircraft			69
Number of spare aircraft engines owned through financing under EETCs | aircraft_engine			79
Long-term debt			$ 22,577,000,000
Operating lease liabilities			$ 9,083,000,000		9,496,000,000
Number of putative class action lawsuits | lawsuit		100
Settlement amount	$ 45,000,000
Number of full-time equivalent employees | Employees			104,200
Percentage of employees covered by collective bargaining agreements with various labor unions			84.00%
Percentage of employees covered by collective bargaining agreements that will become amendable within one year			25.00%
American Airlines, Inc. [Member] | EETC Leveraged Lease Financings [Member]
Long-term Purchase Commitment [Line Items]
Operating lease liabilities			$ 177,000,000
American Airlines, Inc. [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			22,577,000,000		22,722,000,000
American Airlines, Inc. [Member] | Enhanced Equipment Trust Certificates (EETC) [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			11,933,000,000		11,648,000,000
American Airlines, Inc. [Member] | Special Facility Revenue Bonds [Member] | Secured Debt [Member]
Long-term Purchase Commitment [Line Items]
Long-term debt			$ 725,000,000		$ 769,000,000
Fixed interest rate per annum			5.00%
American Airlines, Inc. [Member] | Senior Notes 4.625% Due in 2020 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 500,000,000
American Airlines, Inc. [Member] | Senior Notes 5.000% Due 2022 [Member] | Unsecured Debt [Member]
Long-term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted			$ 750,000,000