Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 08, 2018
Entity Information [Line Items]
Entity Registrant Name	GENESIS ENERGY LP
Entity Central Index Key	0001022321
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		122,539,221
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		39,997