Annual report pursuant to Section 13 and 15(d)

LEASES - Narrative (Details)

v3.21.1
LEASES - Narrative (Details)
$ in Millions
1 Months Ended 2 Months Ended 5 Months Ended 7 Months Ended 12 Months Ended
Oct. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
aircraft
May 31, 2019
USD ($)
aircraft
Mar. 31, 2020
USD ($)
aircraft
Oct. 31, 2019
USD ($)
Mar. 31, 2021
USD ($)
aircraft
Mar. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]                  
Number of aircraft | aircraft           46   44  
Term of contract (up to)               180 months  
Renewal term               60 months  
Due from related parties           $ 14.6   $ 2.6  
Sales-type lease, number of helicopters | aircraft               5  
Sales-type lease, net investment in lease               $ 3.7  
Loss on disposal               6.4  
Sales-type lease, receivable               $ 3.7  
Lease return and termination costs         $ 4.3        
Number of aircraft lease rejections | aircraft       10          
Reduction of ROU assets $ 2.6                
H225 Aircraft                  
Lessee, Lease, Description [Line Items]                  
Number of leased aircraft returned | aircraft         4        
S-76C Aircraft                  
Lessee, Lease, Description [Line Items]                  
Number of aircraft lease rejections | aircraft       9          
S-76D Aircraft                  
Lessee, Lease, Description [Line Items]                  
Number of aircraft lease rejections | aircraft       1          
Low                  
Lessee, Lease, Description [Line Items]                  
Remaining lease term               1 year  
High                  
Lessee, Lease, Description [Line Items]                  
Remaining lease term               58 years  
Aircraft Leases                  
Lessee, Lease, Description [Line Items]                  
Lease return and termination costs     $ 4.2 $ 26.0          
Reduction of ROU assets     18.6            
Reduction of operating lease liabilities     20.2            
Payment of liabilities 3.9                
Corporate Headquarters Lease                  
Lessee, Lease, Description [Line Items]                  
Reduction of ROU assets   $ 13.2              
Reduction of operating lease liabilities   18.9              
Payment of liabilities $ 0.6                
Allowed claim   $ 5.3 $ 5.3            
Leasing From Related Party | VIH Aviation Group                  
Lessee, Lease, Description [Line Items]                  
Lease fees           5.5 $ 8.6 $ 12.9 $ 16.1
Leasing From Related Party | VIH Helicopters USA, Inc                  
Lessee, Lease, Description [Line Items]                  
Lease fees           $ 0.1 $ 0.1 $ 0.2 $ 0.2
Leasing From Related Party | S-92 Model Aircraft                  
Lessee, Lease, Description [Line Items]                  
Number of leased aircraft | aircraft               6  
Leasing From Related Party | AW139 Model Aircraft                  
Lessee, Lease, Description [Line Items]                  
Number of leased aircraft | aircraft               1