Restructuring Costs Restructuring Reserve Roll Forward (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 5.6	$ 0.8
Costs incurred and charged to expense	4.8
Payments for Restructuring	0
Restructuring Reserve	5.6	0.8
QEP Field Services [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	5.6	0.8
Costs incurred and charged to expense	4.8
Payments for Restructuring	0
Restructuring Reserve	5.6	0.8
QEP Marketing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	0	0
Costs incurred and charged to expense	0
Payments for Restructuring	0
Restructuring Reserve	0	0
QEP Energy [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	0	0
Costs incurred and charged to expense	0
Payments for Restructuring	0
Restructuring Reserve	$ 0	$ 0