Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Millions		1 Months Ended
	Apr. 30, 2020	Apr. 30, 2020	Dec. 31, 2020	Mar. 31, 2020
Subsequent Event [Member]
Subsequent Event [Line Items]
Borrowings from credit facilities		$ 2,700,000,000
Secured Debt [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				$ 3,200,000,000
Secured Debt [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Borrowings from credit facilities		2,700,000,000
Secured Debt [Member] | 2013 Credit Facilities [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				750,000,000
Secured Debt [Member] | 2014 Credit Facilities [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				1,643,000,000
Secured Debt [Member] | April 2016 Credit Facilities [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				450,000,000
United States Government [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Approved financial assistance under the CARES Act	$ 5,800,000,000	5,800,000,000
Financial assistance received under the CARES Act		$ 2,900,000,000
Financial assistance received under the CARES Act, percent		50.00%
Warrant, number of shares of common stock (in shares)	6.7	6.7
Warrant threshold percentage increase in principal amount	10.00%
United States Government [Member] | Payroll Support Program Promissory Note [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument, aggregate principal issued	$ 842,000,000	$ 842,000,000
Increase in debt instrument face amount for each disbursement received	30.00%
Forecast [Member] | United States Government [Member]
Subsequent Event [Line Items]
Warrant, number of shares of common stock (in shares)			13.7
Exercise price of warrants (in dollars per share)			$ 12.51
Forecast [Member] | United States Government [Member] | Payroll Support Program Promissory Note [Member]
Subsequent Event [Line Items]
Debt instrument, aggregate principal issued			$ 1,700,000,000
Interest Rate First Five Years [Member] | United States Government [Member] | Payroll Support Program Promissory Note [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Interest rate	1.00%	1.00%
Secured Overnight Financing Rate [Member] | Interest Rate Years Six Through Ten [Member] | United States Government [Member] | Payroll Support Program Promissory Note [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Basis spread on variable rate, floor	0.00%
American Airlines, Inc. [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Borrowings from credit facilities		$ 2,700,000,000
Line of credit facility, remaining borrowing capacity	$ 110,000,000	110,000,000
American Airlines, Inc. [Member] | Secured Debt [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				3,243,000,000
American Airlines, Inc. [Member] | Secured Debt [Member] | 2013 Credit Facilities [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				750,000,000
American Airlines, Inc. [Member] | Secured Debt [Member] | 2013 Credit Facilities [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Borrowings from credit facilities		750,000,000
Line of credit facility, remaining borrowing capacity	0	0
American Airlines, Inc. [Member] | Secured Debt [Member] | 2014 Credit Facilities [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				1,643,000,000
American Airlines, Inc. [Member] | Secured Debt [Member] | 2014 Credit Facilities [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Borrowings from credit facilities		1,500,000,000
American Airlines, Inc. [Member] | Secured Debt [Member] | April 2016 Credit Facilities [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Line of credit facility, remaining borrowing capacity				$ 450,000,000
American Airlines, Inc. [Member] | Secured Debt [Member] | April 2016 Credit Facilities [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Borrowings from credit facilities		450,000,000
Line of credit facility, remaining borrowing capacity	$ 0	$ 0
American Airlines, Inc. [Member] | United States Government [Member] | Payroll Support Program Promissory Note [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Increase in debt instrument face amount for each disbursement received	30.00%