Impairment (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) Reporting_Unit	Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Long-lived assets	$ 44,600
Impairment charge	$ 815
Number of reporting units for goodwill impairment testing | Reporting_Unit	1
Goodwill	$ 4,091	$ 4,091
Indefinite-lived intangible assets	1,800
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Long-lived assets	44,100
Impairment charge	$ 815
Number of reporting units for goodwill impairment testing | Reporting_Unit	1
Goodwill	$ 4,091	$ 4,091
Indefinite-lived intangible assets	$ 1,800