Oil and Natural Gas Property Transactions (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

VPP outstanding

As of December 31, 2018, we had the following VPP outstanding:

					Volume Sold
VPP #	Date of VPP	Location	Proceeds		Oil	Natural Gas	NGL	Total
			($ in millions)		(mmbbl)	(bcf)	(mmbbl)	(bcfe)
9	May 2011	Mid-Continent	$	853	1.7	138	4.8	177

Values to be delivered on behalf of VPP buyers

The volumes remaining to be delivered on behalf of our VPP buyers as of December 31, 2018 were as follows:

		Volume Remaining as of December 31, 2018
VPP #	Term Remaining	Oil	Natural Gas	NGL	Total
	(in months)	(mmbbl)	(bcf)	(mmbbl)	(bcfe)
9	26	0.2	23.1	0.6	28.1