Flight Equipment held for sale (Details) - Aircraft Held For Sale $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2020 USD ($) aircraft	Dec. 31, 2019 USD ($) aircraft
Flight Equipment Held for Sale
Number of aircraft sold or agreed to be sold \| aircraft	1	8
Flight Equipment, Net \| $	$ 29.7	$ 249.6

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