v2.4.0.8
Natural Gas and Oil Property Divestitures - VPP Volume Remaining to Be Delivered Table (Details)
6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2014
Mcfe
Jun. 30, 2014
Reserve Volume Remaining [Member]
Mcfe
Jun. 30, 2014
Natural Gas [Member]
Mcf
Jun. 30, 2014
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Jun. 30, 2014
Oil [Member]
MBbls
Jun. 30, 2014
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Jun. 30, 2014
NGL Reserves [Member]
MBbls
Jun. 30, 2014
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Jun. 30, 2014
VPP 10 Anadarko Basin Granite Wash [Member]
Reserve Volume Remaining [Member]
Mcfe
Jun. 30, 2014
VPP 10 Anadarko Basin Granite Wash [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Jun. 30, 2014
VPP 10 Anadarko Basin Granite Wash [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Jun. 30, 2014
VPP 10 Anadarko Basin Granite Wash [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
May 31, 2011
VPP 9 Mid-Continent [Member]
Mcfe
Jun. 30, 2014
VPP 9 Mid-Continent [Member]
Reserve Volume Remaining [Member]
Mcfe
May 31, 2011
VPP 9 Mid-Continent [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 9 Mid-Continent [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
May 31, 2011
VPP 9 Mid-Continent [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 9 Mid-Continent [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
May 31, 2011
VPP 9 Mid-Continent [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 9 Mid-Continent [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Sep. 30, 2010
VPP 8 Barnett Shale [Member]
Mcfe
Jun. 30, 2014
VPP 8 Barnett Shale [Member]
Reserve Volume Remaining [Member]
Mcfe
Sep. 30, 2010
VPP 8 Barnett Shale [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 8 Barnett Shale [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Sep. 30, 2010
VPP 8 Barnett Shale [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 8 Barnett Shale [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Sep. 30, 2010
VPP 8 Barnett Shale [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 8 Barnett Shale [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Feb. 28, 2010
VPP 6 East Texas and Texas Gulf Coast [Member]
Mcfe
Jun. 30, 2014
VPP 6 East Texas and Texas Gulf Coast [Member]
Reserve Volume Remaining [Member]
Mcfe
Feb. 28, 2010
VPP 6 East Texas and Texas Gulf Coast [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 6 East Texas and Texas Gulf Coast [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Feb. 28, 2010
VPP 6 East Texas and Texas Gulf Coast [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 6 East Texas and Texas Gulf Coast [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Feb. 28, 2010
VPP 6 East Texas and Texas Gulf Coast [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 6 East Texas and Texas Gulf Coast [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Aug. 31, 2009
VPP 5 South Texas [Member]
Mcfe
Jun. 30, 2014
VPP 5 South Texas [Member]
Reserve Volume Remaining [Member]
Mcfe
Aug. 31, 2009
VPP 5 South Texas [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 5 South Texas [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Aug. 31, 2009
VPP 5 South Texas [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 5 South Texas [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Aug. 31, 2009
VPP 5 South Texas [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 5 South Texas [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Dec. 31, 2008
VPP 4 Anadarko and Arkoma Basins [Member]
Mcfe
Jun. 30, 2014
VPP 4 Anadarko and Arkoma Basins [Member]
Reserve Volume Remaining [Member]
Mcfe
Dec. 31, 2008
VPP 4 Anadarko and Arkoma Basins [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 4 Anadarko and Arkoma Basins [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Dec. 31, 2008
VPP 4 Anadarko and Arkoma Basins [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 4 Anadarko and Arkoma Basins [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Dec. 31, 2008
VPP 4 Anadarko and Arkoma Basins [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 4 Anadarko and Arkoma Basins [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Aug. 31, 2008
VPP 3 Anadarko Basin [Member]
Mcfe
Jun. 30, 2014
VPP 3 Anadarko Basin [Member]
Reserve Volume Remaining [Member]
Mcfe
Aug. 31, 2008
VPP 3 Anadarko Basin [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 3 Anadarko Basin [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Aug. 31, 2008
VPP 3 Anadarko Basin [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 3 Anadarko Basin [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Aug. 31, 2008
VPP 3 Anadarko Basin [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 3 Anadarko Basin [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
May 31, 2008
VPP 2 Texas, Oklahoma and Kansas [Member]
Mcfe
Jun. 30, 2014
VPP 2 Texas, Oklahoma and Kansas [Member]
Reserve Volume Remaining [Member]
Mcfe
May 31, 2008
VPP 2 Texas, Oklahoma and Kansas [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 2 Texas, Oklahoma and Kansas [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
May 31, 2008
VPP 2 Texas, Oklahoma and Kansas [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 2 Texas, Oklahoma and Kansas [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
May 31, 2008
VPP 2 Texas, Oklahoma and Kansas [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 2 Texas, Oklahoma and Kansas [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Dec. 31, 2007
VPP 1 Kentucky and West Virginia [Member]
Mcfe
Jun. 30, 2014
VPP 1 Kentucky and West Virginia [Member]
Reserve Volume Remaining [Member]
Mcfe
Dec. 31, 2007
VPP 1 Kentucky and West Virginia [Member]
Natural Gas [Member]
Mcf
Jun. 30, 2014
VPP 1 Kentucky and West Virginia [Member]
Natural Gas [Member]
Reserve Volume Remaining [Member]
Mcf
Dec. 31, 2007
VPP 1 Kentucky and West Virginia [Member]
Oil [Member]
MBbls
Jun. 30, 2014
VPP 1 Kentucky and West Virginia [Member]
Oil [Member]
Reserve Volume Remaining [Member]
MBbls
Dec. 31, 2007
VPP 1 Kentucky and West Virginia [Member]
NGL Reserves [Member]
MBbls
Jun. 30, 2014
VPP 1 Kentucky and West Virginia [Member]
NGL Reserves [Member]
Reserve Volume Remaining [Member]
MBbls
Acquisitions, Divestitures, Joint Ventures, VPP's [Line Items]                                                                                                                                                        
Term remaining (in months)                 92 months         80 months               14 months               67 months               31 months               30 months               61 months               58 months               102 months            
Proved Developed Reserves (Volume)     1,216,000,000,000 383,800,000,000 5,700,000 2,600,000 14,000,000 7,400,000   43,100,000,000 1,500,000 5,300,000     138,000,000,000 80,800,000,000 1,700,000 900,000 4,800,000 2,100,000     390,000,000,000 65,700,000,000 0 0 0 0     44,000,000,000 19,200,000,000 300,000 100,000 0 0     67,000,000,000 13,500,000,000 200,000 0 0 0     95,000,000,000 19,700,000,000 500,000 100,000 0 0     93,000,000,000 27,400,000,000 0 0 0 0     94,000,000,000 16,000,000,000 0 0 0 0     208,000,000,000 98,400,000,000 0 0 0 0
Proved Developed Reserves (Energy) 1,334,000,000,000 444,700,000,000             83,900,000,000       177,000,000,000 99,200,000,000             390,000,000,000 65,700,000,000             46,000,000,000 20,000,000,000             68,000,000,000 13,800,000,000             98,000,000,000 20,300,000,000             93,000,000,000 27,400,000,000             94,000,000,000 16,000,000,000             208,000,000,000 98,400,000,000