Legal Proceedings (Details) shares in Millions, $ in Millions		1 Months Ended
	Jun. 15, 2018 USD ($) lawsuit	Feb. 29, 2020 shares	Sep. 30, 2020 shares
Long-term Purchase Commitment [Line Items]
Common stock held in Disputed Claims reserve (in shares)			4.8
Number of putative class action lawsuits | lawsuit	100
Preliminary settlement amount | $	$ 45
American Airlines, Inc.
Long-term Purchase Commitment [Line Items]
Common stock distributed from Disputed Claims Reserve (in shares)		2.2
Common stock held in Disputed Claims reserve (in shares)			4.8
Number of putative class action lawsuits | lawsuit	100
Preliminary settlement amount | $	$ 45