Impact of the COVID-19 Pandemic - Sale-Leaseback Transactions (Details) - Aircraft sale leaseback $ in Billions	3 Months Ended
	Jun. 30, 2020 USD ($) aircraft transaction
Impact Of Global Pandemic [Line Items]
Sale leaseback transactions | $	$ 2.8
Number of aircraft in sale-Leaseback transactions	85
Number of sale-leaseback transactions that did not qualify as sale | transaction	74
Number of sale-leaseback transactions that qualified as sale | transaction	11
A321-200
Impact Of Global Pandemic [Line Items]
Number of aircraft in sale-Leaseback transactions	25
A220-100
Impact Of Global Pandemic [Line Items]
Number of aircraft in sale-Leaseback transactions	25
CRJ-900
Impact Of Global Pandemic [Line Items]
Number of aircraft in sale-Leaseback transactions	23
737-900ER
Impact Of Global Pandemic [Line Items]
Number of aircraft in sale-Leaseback transactions	10
A330-900
Impact Of Global Pandemic [Line Items]
Number of aircraft in sale-Leaseback transactions	2