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net proceeds from issuance of units to underwriters in connection with initial public offering

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The price per unit of units sold in a public offering of each class of partners' capital account.

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The number of general partner units issued.

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A description of the time period when the company made its initial offering of a class of securities.

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Costs incurred in connection with the offering and selling of additional partner interest.

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Monetary value of the issuance of new units of limited partnership interest in a public offering, net of offering costs. This is a parenthetical disclosure.

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The cash inflow from the issuance of common limited partners units during the period.

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QEP Midstream (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended	9 Months Ended
	Aug. 14, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	0.00%	0.00%	0.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest			0.00%
Limited Partners' Capital Account, Units Issued	6,701,750
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	0.00%	0.00%
Other Ownership Interests, Units Issued	26,705,000
General Partners' Capital Account, Units Issued	1,090,000
Total proceeds from the Offering	$ 420.0	$ 483.0	$ 449.6	$ 0
Initial Offering Period	August 14, 2013
Partners' Capital Account, Units, Sold in Public Offering	20,000,000
Partners Capital Account Units Sold In Public Offering Price Per Unit	$ 21.00
net proceeds from issuance of units to underwriters	58.9
Offering Costs from issuance of Units to Underwriters	4.1
Partners' Capital Account, Public Sale of Units Net of Offering Costs	390.7	449.6
Offering Costs, Partnership Interests	29.3
Offering Costs, Partnership Interests		(33.4)
Partners' Capital Account, Units, Sold to Underwriters	3,000,000
Revolving credit facility origination fees		(3.0)	3.0	17.0
Repayment of outstanding debt with QEP		(95.5)
Net proceeds distributed to QEP from the Offering		351.1
Related Party Transaction, Expenses from Transactions with Related Party	13.8
Management Fees, Base Revenue	$ 1.4