Quarterly report pursuant to Section 13 or 15(d)

VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES - VIE Narrative (Details)

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VARIABLE INTEREST ENTITIES AND OTHER INVESTMENTS IN SIGNIFICANT AFFILIATES - VIE Narrative (Details)
3 Months Ended 9 Months Ended
Dec. 31, 2020
Dec. 31, 2020
affiliates
Variable Interest Entity [Line Items]    
Number of variable interest entities   6
BNAS Holdings | VIE, primary beneficiary    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   49.00%
BNAS    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity 100.00%  
Bristow Aviation Holdings Limited | VIE, primary beneficiary    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   49.00%
Bristow Helicopters Nigeria Ltd | VIE, primary beneficiary    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   48.00%
Pan African Airlines Nigeria Ltd | VIE, primary beneficiary    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   50.17%
European Union (“EU”) National | BNAS Holdings | VIE, primary beneficiary    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   51.00%
Impigra Aviation Holdings Limited | Bristow Aviation Holdings Limited    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   51.00%
Nigerian Company | Bristow Helicopters Nigeria Ltd    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   50.00%
Nigerian Employees | Nigerian Company    
Variable Interest Entity [Line Items]    
Noncontrolling ownership percentage 100.00% 100.00%
Employee Trust Fund | Bristow Helicopters Nigeria Ltd    
Variable Interest Entity [Line Items]    
Ownership percentage in Variable Interest Entity   2.00%