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Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Jul. 31, 2021
USD ($)
Lawsuit
Sep. 30, 2023
Engine
Sep. 30, 2022
USD ($)
Engine
Mar. 31, 2021
USD ($)
Feb. 28, 2021
USD ($)
Purchase Commitment Excluding Longterm Commitment [Line Items]          
Number of putative class action lawsuits | Lawsuit 2        
Forward Purchase Contract [Member] | Heart Aerospace Incorporated [Member] | Maximum [Member]          
Purchase Commitment Excluding Longterm Commitment [Line Items]          
Purchase commitment amount | $ $ 1,200,000,000.0        
CF34-8C5 or CF34-8E5 Engines [Member] | Letter Agreement No. 13-3 [Member]          
Purchase Commitment Excluding Longterm Commitment [Line Items]          
Number of new spare engines to be acquired     10    
New spare engines delivery month and year description     The Company agreed to purchase and take delivery of 10 new CF34-8C5 or CF34-8E5 engines with delivery dates starting from July 1, 2021 through November 1, 2022. During the quarter ended March 31, 2021, a $7.0 million non-refundable purchase deposit was made for the first five (5) engines to be delivered in calendar year 2021.    
Purchase deposit | $       $ 7,000,000.0  
Number of new spare engines to be delivered     5    
Number of additional spare engines to be acquired beyond 2022     10    
Purchase commitment amount | $     $ 52,200,000    
Number of new spare engines purchased     9    
CF34-8C5 or CF34-8E5 Engines [Member] | Scenario Forecast [Member] | Letter Agreement No. 13-3 [Member]          
Purchase Commitment Excluding Longterm Commitment [Line Items]          
Number of new spare engines to be delivered   3      
eVTOL Aircraft [Member] | Forward Purchase Contract [Member] | Archer Aviation, Inc. [Member]          
Purchase Commitment Excluding Longterm Commitment [Line Items]          
Purchase commitment amount | $         $ 200,000,000.0