Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Mar. 31, 2016	May. 23, 2016	Sep. 30, 2015
Document and Entity Information
Entity Registrant Name	NGL Energy Partners LP
Entity Central Index Key	0001504461
Document Type	10-K
Document Period End Date	Mar. 31, 2016
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1.9
Entity Common Stock, Shares Outstanding		104,169,573
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY