Impairment (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) reporting_unit	Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Long-lived assets	$ 42,000	$ 42,000
Impairment charge	714	$ 1,500
Number of reporting units for goodwill impairment testing | reporting_unit		1
Goodwill	4,091	$ 4,091	$ 4,091
Indefinite-lived intangible assets	1,800	1,800
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Long-lived assets	41,500	41,500
Impairment charge	714	$ 1,500
Number of reporting units for goodwill impairment testing | reporting_unit		1
Goodwill	4,091	$ 4,091	$ 4,091
Indefinite-lived intangible assets	$ 1,800	$ 1,800