Derivative Contracts Schedule Of Commodity Derivative Contracts (Details) MMBTU in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) MMBTU $ / MMBTU
Natural Gas Sales [Member] | QEP Energy [Member] | Year 2015 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative Contract Year	2015
Derivative, Underlying Basis	NYMEX HH
Derivative, Nonmonetary Notional Amount	17.5
Underlying, Derivative Asset | $ / MMBTU	3.48
Natural Gas Sales [Member] | QEP Energy [Member] | Year 2015 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2015
Derivative, Underlying Basis	IFNPCR
Derivative, Nonmonetary Notional Amount	12.0
Underlying, Derivative Asset | $ / MMBTU	3.55
Natural Gas Sales [Member] | QEP Energy [Member] | Year 2016 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative Contract Year	2016
Derivative, Underlying Basis	NYMEX HH
Derivative, Nonmonetary Notional Amount	22.0
Underlying, Derivative Asset | $ / MMBTU	3.19
Natural Gas Sales [Member] | QEP Energy [Member] | Year 2016 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2016
Derivative, Underlying Basis	IFNPCR
Derivative, Nonmonetary Notional Amount	32.9
Underlying, Derivative Asset | $ / MMBTU	2.92
Natural Gas Sales [Member] | QEP Energy [Member] | Year 2017 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2017
Derivative, Underlying Basis	NYMEX HH
Derivative, Nonmonetary Notional Amount	7.3
Underlying, Derivative Asset | $ / MMBTU	3.21
Natural Gas Sales [Member] | QEP Marketing [Member] | Year 2015 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2015
Derivative, Underlying Basis	IFNPCR
Derivative, Nonmonetary Notional Amount	2.4
Underlying, Derivative Asset | $ / MMBTU	3.25
Natural Gas Sales [Member] | QEP Marketing [Member] | Year 2016 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2016
Derivative, Underlying Basis	IFNPCR
Derivative, Nonmonetary Notional Amount	2.9
Underlying, Derivative Asset | $ / MMBTU	3.06
Purchased Gas and Oil Expense [Member] | QEP Marketing [Member] | Year 2015 [Member] | IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2015
Derivative, Underlying Basis	IFNPCR
Derivative, Nonmonetary Notional Amount	1.2
Underlying, Derivative Asset | $ / MMBTU	2.75
Natural Gas [Member] | QEP Energy [Member] | Year 2016 [Member] | NYMEX HH [Member]
Derivative [Line Items]
Derivative Contract Year	2016
Derivative, Underlying Basis	NYMEX HH
Derivative, Nonmonetary Notional Amount	7.3
Derivative Average Price Floor | $	$ 2.75
Derivative Average Price Ceiling | $	$ 3.89
Oil Sales [Member] | QEP Energy [Member] | Year 2015 [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative Contract Year	2015
Derivative, Underlying Basis	NYMEX WTI
Derivative, Nonmonetary Notional Amount	2.6
Underlying, Derivative Asset | $ / MMBTU	82.09
Oil Sales [Member] | QEP Energy [Member] | Year 2015 [Member] | BRENT ICE [Member]
Derivative [Line Items]
Derivative Contract Year	2015
Derivative, Underlying Basis	ICE Brent
Derivative, Nonmonetary Notional Amount	0.1
Underlying, Derivative Asset | $ / MMBTU	104.95
Oil Sales [Member] | QEP Energy [Member] | Year 2016 [Member] | NYMEX WTI [Member]
Derivative [Line Items]
Derivative Contract Year	2016
Derivative, Underlying Basis	NYMEX WTI
Derivative, Nonmonetary Notional Amount	3.3
Underlying, Derivative Asset | $ / MMBTU	65.43
Gas Basis Swaps [Member] | QEP Energy [Member] | Year 2015 [Member] | NYMEX HH LESS IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2015
Derivative, Underlying Basis	IFNPCR
Derivative, Nonmonetary Notional Amount	11.0
Underlying, Derivative Asset | $ / MMBTU	(0.28)
Gas Basis Swaps [Member] | QEP Energy [Member] | Year 2016 [Member] | NYMEX HH LESS IFNPCR [Member]
Derivative [Line Items]
Derivative Contract Year	2016
Derivative, Underlying Basis	IFNPCR
Derivative, Nonmonetary Notional Amount	7.3
Underlying, Derivative Asset | $ / MMBTU	(0.20)