Acquisition Acquisition (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		6 Months Ended				3 Months Ended	0 Months Ended
	Jun. 30, 2013	Apr. 30, 2013 Subsequent Event [Member] Mid-America Midstream Gas Services, L.L.C. [Member] acre mi	Jun. 30, 2013 Subsequent Event [Member] Mid-America Midstream Gas Services, L.L.C. [Member] Gathering and processing agreement [Member]	Aug. 01, 2013 Subsequent Event [Member] Barcas Field Services, LLC [Member] Trailers Trucks	Apr. 30, 2013 Rose Valley I plant [Member] Subsequent Event [Member] Mid-America Midstream Gas Services, L.L.C. [Member] MMcf	Apr. 30, 2013 Rose Valley II plant [Member] Subsequent Event [Member] Mid-America Midstream Gas Services, L.L.C. [Member] MMcf	Mar. 31, 2013 General Partner [Member] NGL Energy Partners LP [Member]	Aug. 08, 2013 General Partner [Member] NGL Energy Partners LP [Member] Subsequent Event [Member]	Aug. 08, 2013 General Partner [Member] NGL Energy Partners LP [Member] Subsequent Event [Member] Additional GP ownership acquired [Member]
Acquisition [Line Items]
Payments to Acquire Productive Assets		$ 300		$ 47
Length Of Pipeline Network		200
Processing Capacity					200	200
Net Acre Dedication Acquired		540,000
Contract tenor			20 years
Percentage of contract which is fee based	100.00%
Future Capital Expenditures Related to Acquisition		$ 125
Trucks purchased				114
Trailers purchased				120
General Partner Ownership Interest							6.42%	11.78%	5.36%