Legal Proceedings (Details) shares in Millions, $ in Millions			1 Months Ended
	Dec. 11, 2018 USD ($)	Jun. 15, 2018 USD ($) lawsuit	Feb. 29, 2020 shares	Jun. 30, 2020 shares
Long-term Purchase Commitment [Line Items]
Common stock held in Disputed Claims reserve (in shares) | shares				4.8
Number of putative class action lawsuits | lawsuit		100
Preliminary settlement amount | $	$ 1	$ 45
American Airlines, Inc. [Member]
Long-term Purchase Commitment [Line Items]
Common stock distributed from Disputed Claims Reserve (in shares) | shares			2.2
Number of putative class action lawsuits | lawsuit		100
Preliminary settlement amount | $	$ 1	$ 45