Assets Held for Sale (Details) - CRJ 700 - Held for sale $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($) aircraft	Jun. 30, 2022 USD ($)
Assets Held for Sale
Number of aircraft held-for-sale | aircraft	4
Assets held for sale	$ 13.5	$ 13.5
Impairment loss of assets held for sale		$ 15.2