Document and Entity Information Document - shares	9 Months Ended
	Dec. 31, 2019	Feb. 04, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	1-12235
Entity Registrant Name	TRIUMPH GROUP INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0347963
Entity Address, Address Line One	899 Cassatt Road,
Entity Address, Address Line Two	Suite 210,
Entity Address, City or Town	Berwyn,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19312
City Area Code	610
Local Phone Number	251-1000
Trading Symbol	TGI
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		51,849,181
Entity Central Index Key	0001021162
Current Fiscal Year End Date	--03-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $.001 per share
Rights [Member]
Entity Information [Line Items]
Title of 12(b) Security	Purchase Rights