(Loss) Earnings Per Share - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Basic (loss) income per share:
Net loss attributable to Pyxus International, Inc.	$ (164,353)	$ (21,993)	$ (16,518)	$ (61,797)	$ (9,979)	$ (5,095)	$ (54,634)	$ (759)	$ (264,661)	$ (70,467)	$ 52,436
Weighted average number of shares outstanding (shares)									9,148	9,054	8,989
Basic loss per share (USD per share)	$ (17.91)	$ (2.40)	$ (1.81)	$ (6.79)	$ (1.10)	$ (0.56)	$ (6.04)	$ (0.08)	$ (28.93)	$ (7.78)	$ 5.83
Diluted (loss) income per share:
Net loss attributable to Pyxus International, Inc.	$ (164,353)	$ (21,993)	$ (16,518)	$ (61,797)	$ (9,979)	$ (5,095)	$ (54,634)	$ (759)	$ (264,661)	$ (70,467)	$ 52,436
Weighted average number of shares outstanding (shares)									9,148	9,054	8,989
Plus: Restricted shares issued and shares applicable to stock options and restricted stock units, net of shares assumed to be purchased from proceeds at average market price (shares)									0	0	33
Adjusted weighted average number of common shares outstanding (shares)									9,148	9,054	9,022
Diluted (USD per share)	$ (17.91)	$ (2.40)	$ (1.81)	$ (6.79)	$ (1.10)	$ (0.56)	$ (6.04)	$ (0.08)	$ (28.93)	$ (7.78)	$ 5.81
Common stock owned by subsidiary (shares)	785				785				785	785	785
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)									452	427	427
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)									23	63