Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2015	Aug. 03, 2015
Document and Entity Information
Entity Registrant Name	NGL Energy Partners LP
Entity Central Index Key	0001504461
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Units Outstanding		107,274,540
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1