Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for obsolescence of spare parts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 814	$ 769	$ 765
Additions Charged to Statement of Operations Accounts	91	70	29
Deductions	(121)	(25)	(25)
Balance at End of Year	784	814	769
Allowance for uncollectible accounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	29	24	36
Additions Charged to Statement of Operations Accounts	19	42	43
Deductions	(17)	(37)	(55)
Balance at End of Year	31	29	24
American Airlines, Inc. [Member] | Allowance for obsolescence of spare parts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	754	717	720
Additions Charged to Statement of Operations Accounts	79	57	18
Deductions	(104)	(20)	(21)
Balance at End of Year	729	754	717
American Airlines, Inc. [Member] | Allowance for uncollectible accounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	24	21	35
Additions Charged to Statement of Operations Accounts	17	39	41
Deductions	(16)	(36)	(55)
Balance at End of Year	$ 25	$ 24	$ 21