CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (162,919)	$ (143,430)	$ (332,007)	$ (175,227)
Other comprehensive loss:
Currency translation adjustments	(12,334)	(7,967)	4,565	(37,000)
Unrealized gain (loss) on cash flow hedges, net of tax benefit of zero, $(0.1) million, zero and $0.2 million, respectively	1,124	(98)	1,598	1,250
Total comprehensive loss	(174,129)	(151,495)	(325,844)	(210,977)
Net income attributable to noncontrolling interests	(55)	(517)	(213)	(584)
Currency translation adjustments attributable to noncontrolling interests	35	(32)	24	(171)
Total comprehensive income attributable to noncontrolling interests	(20)	(549)	(189)	(755)
Total comprehensive loss attributable to Bristow Group	$ (174,149)	$ (152,044)	$ (326,033)	$ (211,732)