Legal Proceedings (Details) $ in Millions	Jun. 15, 2018 USD ($) lawsuit
Long-term Purchase Commitment [Line Items]
Number of putative class action lawsuits | lawsuit	100
Preliminary settlement amount | $	$ 45
American Airlines, Inc.
Long-term Purchase Commitment [Line Items]
Number of putative class action lawsuits | lawsuit	100
Preliminary settlement amount | $	$ 45