10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2011

or

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to

Commission File Number: 001-32678

DCP MIDSTREAM PARTNERS, LP

(Exact name of registrant as specified in its charter)

Delaware	03-0567133
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

370 17th Street, Suite 2775 Denver, Colorado	80202
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (303) 633-2900

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No   x

As of August 3, 2011, there were outstanding 44,083,418 common units representing limited partner interests.

DCP MIDSTREAM PARTNERS, LP

FORM 10-Q FOR THE QUARTER ENDED JUNE 30, 2011

TABLE OF CONTENTS

Item		Page
	PART I. FINANCIAL INFORMATION
1.	Financial Statements (unaudited):
	Condensed Consolidated Balance Sheets as of June 30, 2011 and December 31, 2010		1
	Condensed Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2011 and 2010		2
	Condensed Consolidated Statements of Comprehensive Income for the Three and Six Months Ended June 30, 2011 and 2010		3
	Condensed Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2011 and 2010		4
	Condensed Consolidated Statements of Changes in Equity for the Six Months Ended June 30, 2011 and 2010		5
	Notes to the Condensed Consolidated Financial Statements		6
2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		47
3.	Quantitative and Qualitative Disclosures about Market Risk		69
4.	Controls and Procedures		74
	PART II. OTHER INFORMATION		74
1.	Legal Proceedings		74
1A.	Risk Factors		74
6.	Exhibits		75
	Signatures		76
	Exhibit Index		77
	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes Oxley Act of 2002
	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes Oxley Act of 2002
	Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes Oxley Act of 2002
	Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes Oxley Act of 2002

i

GLOSSARY OF TERMS

The following is a list of certain industry terms used throughout this report:

Bbl	barrel
Bbls/d	barrels per day
Btu	British thermal unit, a measurement of energy
BBtu/d	one billion Btus per day
Bcf	one billion cubic feet
Bcf/d	one billion cubic feet per day
Frac spread	price differences, measured in energy units, between equivalent amounts of natural gas and natural gas liquids
Fractionation	the process by which natural gas liquids are separated into individual components
MBbls	one thousand barrels
MBbls/d	one thousand barrels per day
MMBbls	one million barrels
MMBtu	one million British thermal units, a measurement of energy
MMBtu/d	one million Btus per day
MMcf	one million cubic feet
MMcf/d	one million cubic feet per day
NGLs	natural gas liquids
Throughput	the volume of product transported or passing through a pipeline or other facility

ii

CAUTIONARY STATEMENT ABOUT FORWARD-LOOKING STATEMENTS

Our reports, filings and other public announcements may from time to time contain statements that do not directly or exclusively relate to historical facts. Such statements are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. You can typically identify forward-looking statements by the use of forward-looking words, such as “may,” “could,” “project,” “believe,” “anticipate,” “expect,” “estimate,” “potential,” “plan,” “forecast” and other similar words.

All statements that are not statements of historical facts, including statements regarding our future financial position, business strategy, budgets, projected costs and plans and objectives of management for future operations, are forward-looking statements.

These forward-looking statements reflect our intentions, plans, expectations, assumptions and beliefs about future events and are subject to risks, uncertainties and other factors, many of which are outside our control. Important factors that could cause actual results to differ materially from the expectations expressed or implied in the forward-looking statements include known and unknown risks. Known risks and uncertainties include, but are not limited to, the risks set forth in “Item 1A. Risk Factors” in this Quarterly Report on Form 10-Q and in our Annual Report on Form 10-K for the year ended December 31, 2010, as well as the following risks and uncertainties:

• the extent of changes in commodity prices, our ability to effectively limit a portion of the adverse impact of potential changes in prices through derivative financial instruments, and the potential impact of price and producers’ access to capital on natural gas drilling, demand for our services, and the volume of NGLs and condensate extracted;

• general economic, market and business conditions;

• the level and success of natural gas drilling around our assets, the level and quality of gas production volumes around our assets and our ability to connect supplies to our gathering and processing systems in light of competition;

• our ability to grow through acquisitions, contributions from affiliates, or organic growth projects, and the successful integration and future performance of such assets;

• our ability to access the debt and equity markets and the resulting cost of capital, which will depend on general market conditions, our financial and operating results, inflation rates, interest rates and our ability to effectively limit a portion of the adverse effects of potential changes in interest rates by entering into derivative financial instruments, our ability to comply with the covenants to our credit agreement and our debt securities, as well as our ability to maintain our credit ratings;

• our ability to purchase propane from our principal suppliers and make associated profitable sales transactions for our wholesale propane logistics business;

• our ability to construct facilities in a timely fashion, which is partially dependent on obtaining required construction, environmental and other permits issued by federal, state and municipal governments, or agencies thereof, the availability of specialized contractors and laborers, and the price of and demand for materials;

• the creditworthiness of counterparties to our transactions;

• weather and other natural phenomena, including their potential impact on demand for the commodities we sell and the operation of company-owned and third party-owned infrastructure;

• new, additions to and changes in laws and regulations, particularly with regard to taxes, safety and protection of the environment, including climate change legislation, or the increased regulation of our industry;

• our ability to obtain insurance on commercially reasonable terms, if at all, as well as the adequacy of insurance to cover our losses;

• industry changes, including the impact of consolidations, increased delivery of liquefied natural gas to the United States, alternative energy sources, technological advances and changes in competition; and

• the amount of collateral we may be required to post from time to time in our transactions including changes resulting from the Dodd-Frank Wall Street Reform and Consumer Protection Act.

In light of these risks, uncertainties and assumptions, the events described in the forward-looking statements might not occur or might occur to a different extent or at a different time than we have described. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

iii

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

DCP MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	June 30, 2011			December 31, 2010
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	2.4		$	6.7
Accounts receivable:
Trade, net of allowance for doubtful accounts of $0.3 and $0.5 million, respectively		66.4			89.3
Affiliates		74.2			61.7
Inventories		42.4			64.1
Unrealized gains on derivative instruments		1.3			1.9
Assets held for sale		—			6.2
Other		1.6			2.1
Total current assets		188.3			232.0
Property, plant and equipment, net		1,115.3			1,097.1
Goodwill		146.9			139.3
Intangible assets, net		117.0			119.3
Investments in unconsolidated affiliates		218.5			216.9
Unrealized gains on derivative instruments		1.7			1.4
Other long-term assets		7.3			7.2
Total assets	$	1,795.0		$	1,813.2
LIABILITIES AND EQUITY
Current liabilities:
Accounts payable:
Trade	$	78.4		$	99.1
Affiliates		29.2			37.6
Unrealized losses on derivative instruments		47.0			43.0
Revolving credit facility		461.0			—
Other		38.0			31.5
Total current liabilities		653.6			211.2
Long-term debt		249.8			647.8
Unrealized losses on derivative instruments		52.6			50.3
Other long-term liabilities		15.8			53.1
Total liabilities		971.8			962.4
Commitments and contingent liabilities
Equity:
Predecessor equity		—			112.6
Common unitholders (44,083,418 and 40,478,383 units issued and outstanding, respectively)		628.2			552.2
General partner		(5.6	)		(6.4	)
Accumulated other comprehensive loss		(22.5	)		(27.7	)
Total partners’ equity		600.1			630.7
Noncontrolling interests		223.1			220.1
Total equity		823.2			850.8
Total liabilities and equity	$	1,795.0		$	1,813.2

See accompanying notes to condensed consolidated financial statements.

1

DCP MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

	Three Months Ended June  30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(Millions, except per unit amounts)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	155.3		$	93.2		$	452.8		$	328.6
Sales of natural gas, propane, NGLs and condensate to affiliates		167.8			134.8			300.0			269.8
Transportation, processing and other		30.4			22.1			60.9			43.7
Transportation, processing and other to affiliates		8.1			4.9			13.2			10.6
Gains (losses) from commodity derivative activity, net		13.2			22.8			(25.7	)		28.8
(Losses) from commodity derivative activity, net — affiliates		(0.6	)		(0.3	)		(1.9	)		(0.3	)
Total operating revenues		374.2			277.5			799.3			681.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		190.2			178.1			412.5			369.6
Purchases of natural gas, propane and NGLs from affiliates		84.1			27.6			236.8			168.9
Operating and maintenance expense		21.7			20.6			45.8			39.6
Depreciation and amortization expense		20.1			18.7			40.0			36.5
General and administrative expense		3.7			3.4			7.9			7.1
General and administrative expense — affiliates		4.9			4.8			9.7			9.7
Other income		(0.1	)		(0.5	)		(0.2	)		(0.5	)
Other income — affiliates		—			(3.0	)		—			(3.0	)
Total operating costs and expenses		324.6			249.7			752.5			627.9
Operating income		49.6			27.8			46.8			53.3
Interest expense		(8.4	)		(7.3	)		(16.4	)		(14.5	)
Earnings from unconsolidated affiliates		10.0			6.4			18.6			20.8
Income before income taxes		51.2			26.9			49.0			59.6
Income tax expense		—			(0.1	)		(0.2	)		(0.4	)
Net income		51.2			26.8			48.8			59.2
Net income attributable to noncontrolling interests		(9.7	)		(1.0	)		(13.2	)		(1.1	)
Net income attributable to partners		41.5			25.8			35.6			58.1
Net loss (income) attributable to predecessor operations		—			0.2			—			(6.3	)
General partner’s interest in net income		(6.2	)		(4.2	)		(11.7	)		(8.0	)
Net income allocable to limited partners	$	35.3		$	21.8		$	23.9		$	43.8
Net income per limited partner unit — basic	$	0.80		$	0.63		$	0.56		$	1.27
Net income per limited partner unit — diluted	$	0.80		$	0.63		$	0.56		$	1.27
Weighted-average limited partner units outstanding — basic		44.1			34.6			42.7			34.6
Weighted-average limited partner units outstanding — diluted		44.2			34.6			42.7			34.6

See accompanying notes to condensed consolidated financial statements.

2

DCP MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended June  30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
Net income	$	51.2		$	26.8		$	48.8		$	59.2
Other comprehensive income (loss):
Reclassification of cash flow hedge losses into earnings		5.1			5.6			10.4			11.6
Net unrealized losses on cash flow hedges		(3.4	)		(5.8	)		(4.3	)		(13.4	)
Total other comprehensive income (loss)		1.7			(0.2	)		6.1			(1.8	)
Total comprehensive income		52.9			26.6			54.9			57.4
Total comprehensive income attributable to noncontrolling interests		(9.7	)		(1.0	)		(13.2	)		(1.1	)
Total comprehensive income attributable to partners	$	43.2		$	25.6		$	41.7		$	56.3

See accompanying notes to condensed consolidated financial statements.

3

DCP MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Six Months Ended June 30,
	2011			2010
	(Millions)
OPERATING ACTIVITIES:
Net income	$	48.8		$	59.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense		40.0			36.5
Earnings from unconsolidated affiliates		(18.6	)		(20.8	)
Distributions from unconsolidated affiliates		24.0			21.0
Other, net		(6.0	)		1.1
Change in operating assets and liabilities, which provided (used) cash net of effects of acquisitions:
Accounts receivable		17.6			47.8
Inventories		21.7			14.6
Net unrealized losses (gains) on derivative instruments		12.9			(30.3	)
Accounts payable		(29.9	)		(42.5	)
Accrued interest		0.1			0.1
Other current assets and liabilities		(19.2	)		2.8
Other long-term assets and liabilities		(2.8	)		0.2
Net cash provided by operating activities		88.6			89.7
INVESTING ACTIVITIES:
Capital expenditures		(29.2	)		(25.4	)
Acquisitions, net of cash acquired		(37.1	)		(22.0	)
Acquisition of unconsolidated affiliate		(114.3	)		—
Investments in unconsolidated affiliates		(7.1	)		(27.0	)
Return of investment from unconsolidated affiliates		1.6			—
Proceeds from sale of assets		0.2			1.7
Proceeds from sales of available-for-sale securities		—			10.1
Net cash used in investing activities		(185.9	)		(62.6	)
FINANCING ACTIVITIES:
Proceeds from debt		716.0			210.6
Payments of debt		(653.0	)		(208.6	)
Payment of deferred financing costs		(0.1	)		—
Proceeds from issuance of common units, net of offering costs		139.4			—
Excess purchase price over acquired assets		(35.7	)		—
Net change in advances to predecessor from DCP Midstream, LLC		—			25.3
Distributions to unitholders and general partner		(63.4	)		(49.1	)
Distributions to noncontrolling interests		(15.8	)		(8.2	)
Contributions from noncontrolling interests		5.6			9.1
Purchase of additional interest in a subsidiary		—			(3.5	)
Net cash provided by (used in) financing activities		93.0			(24.4	)
Net change in cash and cash equivalents		(4.3	)		2.7
Cash and cash equivalents, beginning of period		6.7			2.1
Cash and cash equivalents, end of period	$	2.4		$	4.8

See accompanying notes to condensed consolidated financial statements.

4

DCP MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

(Unaudited)

	Partner’s Equity
	Predecessor Equity			Common Unitholders			General Partner			Accumulated Other Comprehensive (Loss) Income			Noncontrolling Interests			Total Equity
	(Millions)
Balance, January 1, 2011	$	112.6		$	552.2		$	(6.4	)	$	(27.7	)	$	220.1		$	850.8
Net change in parent advances		1.7			—			—			—			—			1.7
Acquisition of Southeast Texas		(114.3	)		—			—			—			—			(114.3	)
Excess purchase price over acquired assets		—			(34.8	)		—			(0.9	)		—			(35.7	)
Issuance of 3,596,636 common units		—			139.7			—			—			—			139.7
Equity-based compensation		—			2.3			—			—			—			2.3
Distributions to DCP Midstream, LLC		—			(2.6	)		—			—			—			(2.6	)
Distributions to unitholders and general partner		—			(52.5	)		(10.9	)		—			—			(63.4	)
Distributions to noncontrolling interests		—			—			—			—			(15.8	)		(15.8	)
Contributions from noncontrolling interests		—			—			—			—			5.6			5.6
Comprehensive income:
Net income		—			23.9			11.7			—			13.2			48.8
Reclassification of cash flow hedges into earnings		—			—			—			10.4			—			10.4
Net unrealized losses on cash flow hedges		—			—			—			(4.3	)		—			(4.3	)
Total comprehensive income		—			23.9			11.7			6.1			13.2			54.9
Balance, June 30, 2011	$	—		$	628.2		$	(5.6	)	$	(22.5	)	$	223.1		$	823.2
	Partner’s Equity
	Predecessor Equity			Common Unitholders			General Partner			Accumulated Other Comprehensive (Loss) Income			Noncontrolling Interests			Total Equity
	(Millions)
Balance, January 1, 2010	$	70.8		$	415.5		$	(5.9	)	$	(31.9	)	$	227.7		$	676.2
Net change in parent advances		25.3			—			—			—			—			25.3
Purchase of additional interest in a subsidiary		—			1.0			—			—			(5.5	)		(4.5	)
Distributions to unitholders and general partner					(41.5	)		(7.6	)								(49.1	)
Distributions to noncontrolling interests		—			—			—			—			(8.2	)		(8.2	)
Contributions from noncontrolling interests		—			—			—			—			9.1			9.1
Comprehensive income (loss):
Net income attributable to predecessor operations		6.3			—			—			—			—			6.3
Net income		—			44.1			7.7			—			1.1			52.9
Reclassification of cash flow hedge losses into earnings		—			—			—			11.6			—			11.6
Net unrealized losses on cash flow hedges		—			—			—			(13.4	)		—			(13.4	)
Total comprehensive income (loss)		6.3			44.1			7.7			(1.8	)		1.1			57.4
Balance, June 30, 2010	$	102.4		$	419.1		$	(5.8	)	$	(33.7	)	$	224.2		$	706.2

See accompanying notes to condensed consolidated financial statements.

5

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Description of Business and Basis of Presentation

DCP Midstream Partners, LP, with its consolidated subsidiaries, or us, we or our, is engaged in the business of gathering, compressing, treating, processing, transporting, storing and selling natural gas; and producing, fractionating, transporting, storing and selling NGLs and condensate.

We are a Delaware limited partnership that was formed in August 2005. We completed our initial public offering on December 7, 2005. Our partnership includes: our Northern Louisiana system; our Southern Oklahoma system; our 40% limited liability company interest in Discovery Producer Services LLC, or Discovery; our Wyoming system; a 75% interest in Collbran Valley Gas Gathering, LLC, or Collbran or our Colorado system (of which 5% was acquired in February 2010); our 50.1% interest in our DCP East Texas Holdings, LLC, or our East Texas system; our Michigan system; our 33.33% interest in our DCP Southeast Texas Holdings, GP, or our Southeast Texas system acquired in January 2011; our wholesale propane logistics business (which includes Atlantic Energy acquired in July 2010); and our NGL logistics business (which includes Marysville Hydrocarbons Holdings, Inc, or Marysville, acquired in December 2010, the Wattenberg pipeline acquired in January 2010 and our 100% interest in the Black Lake Pipeline Company, or Black Lake, 55% of which was acquired in July 2010, comprised of: (1) a 5% interest acquired from DCP Midstream, LLC, in a transaction among entities under common control, and (2) an additional 50% interest acquired from an affiliate of BP PLC; and the DJ Basin NGL Fractionators acquired in March 2011).

Our operations and activities are managed by our general partner, DCP Midstream GP, LP, which in turn is managed by its general partner, DCP Midstream GP, LLC, which we refer to as the General Partner, and is wholly-owned by DCP Midstream, LLC. DCP Midstream, LLC and its subsidiaries and affiliates, collectively referred to as DCP Midstream, LLC, is owned 50% by Spectra Energy Corp, or Spectra Energy, and 50% by ConocoPhillips. DCP Midstream, LLC directs our business operations through its ownership and control of the General Partner. DCP Midstream, LLC and its affiliates’ employees provide administrative support to us and operate most of our assets. DCP Midstream, LLC owns approximately 27% of us.

The condensed consolidated financial statements include the accounts of the Partnership and all majority-owned subsidiaries where we have the ability to exercise control and undivided interests in jointly owned assets. Investments in greater than 20% owned affiliates that are not variable interest entities and where we do not have the ability to exercise control, and investments in less than 20% owned affiliates where we have the ability to exercise significant influence, are accounted for using the equity method. Intercompany balances and transactions have been eliminated.

On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million, in a transaction among entities under common control. Transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method. Accordingly, our condensed consolidated financial statements have been adjusted to include the historical results of our equity interest in Southeast Texas for all periods presented. We refer to our 33.33% interest in Southeast Texas, prior to our acquisition from DCP Midstream, LLC in January 2011, as our “predecessor.” We recognize transfers of net assets between entities under common control at DCP Midstream, LLC’s basis in the net assets contributed. The amount of the purchase price in excess of DCP Midstream, LLC’s basis in the net assets is recognized as a reduction to partners’ equity. The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity.

The results of operations for acquisitions accounted for as business combinations have been included in the condensed consolidated financial statements since their respective acquisition dates and we have retrospectively adjusted the December 31, 2010 condensed consolidated balance sheet for changes in our preliminary purchase price allocation for our December 30, 2010 acquisition of Marysville.

The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP. Conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and notes. Although these estimates are based on management’s best available knowledge of current and expected future events, actual results could differ from those estimates. All intercompany balances and transactions have been eliminated. Transactions between us and other DCP Midstream, LLC operations have been identified in the condensed consolidated financial statements as transactions between affiliates.

6

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The accompanying unaudited condensed consolidated financial statements in this Quarterly Report on Form 10-Q have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission, or SEC. Accordingly, these condensed consolidated financial statements reflect all normal recurring adjustments that are, in the opinion of management, necessary to present fairly the financial position and results of operations for the respective interim periods. Certain information and notes normally included in our annual financial statements have been condensed or omitted from these interim financial statements pursuant to such rules and regulations. Results of operations for the three and six months ended June 30, 2011 are not necessarily indicative of the results that may be expected for the year ending December 31, 2011. These condensed consolidated financial statements and other information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and notes thereto included in our Current Report on Form 8-K filed on June 17, 2011.

2. Recent Accounting Pronouncements

Financial Accounting Standards Board, or FASB, Accounting Standards Update, or ASU, 2011-04 “Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs”, or ASU 2011-04 — In May 2011, the FASB issued ASU 2011-04 which amends Accounting Standards Codification, or ASC, Topic 820 “Fair Value Measurements and Disclosures” to change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements, clarify the FASB’s intent about the application of existing fair value measurement requirements, and change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. The provisions of ASU 2011-04 are effective for us for interim and annual periods beginning after December 15, 2011 and we are currently assessing the impact of adoption on our consolidated results of operations, cash flows and financial position.

3. Acquisitions

On March 24, 2011, we acquired two NGL fractionation facilities in Weld County, Colorado, located in the Denver-Julesburg, or DJ, Basin, from a third party in a transaction accounted for as an asset acquisition. We paid a purchase price of $30.0 million, financed initially at closing with borrowings under the Partnership’s revolving credit facility, and received a post-closing purchase price adjustment of $0.4 million. The NGL fractionation facilities, or the DJ Basin NGL Fractionators, are located on DCP Midstream, LLC’s processing plant sites and are operated by DCP Midstream, LLC. Subsequent to our acquisition, DCP Midstream, LLC will continue to operate and supply certain committed NGLs produced by them in Weld County to our DJ Basin NGL Fractionators under the existing agreements that are effective through March 2018. The results of the assets are included in our NGL Logistics segment prospectively, from the date of acquisition.

On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million, in a transaction among entities under common control, financed initially at closing with proceeds from our November 2010 public equity offering and borrowings under the Partnership’s revolving credit facility. DCP Midstream, LLC’s historical carrying value of the net assets acquired in the acquisition was $114.3 million; accordingly we have recorded the $35.7 million excess purchase price over acquired assets as a decrease in common unitholders equity. The results of our 33.33% interest in Southeast Texas are included in our Natural Gas Services segment for all periods presented.

On December 30, 2010, we acquired all of the interests in Marysville. The acquisition involved three separate transactions with a number of parties. We acquired a 90% interest in Marysville from Dart Energy Corporation, a 5% interest in Marysville from Prospect Street Energy, LLC and 100% of EE Group, LLC, which owned the remaining 5% interest in Marysville. We paid a purchase price of $94.8 million plus $6.0 million for net working capital and other adjustments for an aggregate purchase price of $100.8 million, subject to customary purchase price adjustments, for our 100% interest. The cash purchase was financed initially at closing with borrowings under the Partnership’s revolving credit facility. $21.2 million of the purchase price has been deposited in an indemnity escrow to satisfy certain tax liabilities and provide for breaches of representations and warranties of the sellers. $19.5 million remains in the escrow account after $1.7 million was released on June 15, 2011. The results of the Marysville acquisition are included in our NGL Logistics segment prospectively, from the date of acquisition.

On January 4, 2011, we merged two wholly-owned subsidiaries of Marysville and converted the combined entity’s organizational structure from a corporation to a limited liability company. This conversion to a limited liability company triggered tax liabilities, resulting from built-in tax gains recognized in the transaction, to become currently payable. Accordingly, $35.0 million of estimated deferred tax liabilities associated with this transaction and recorded at December 31, 2010, became currently payable as of January 4, 2011. These tax liabilities are unrelated to the tax liabilities of Marysville for which an indemnity escrow has been established. These tax liabilities may be greater or less than the $35.0 million we initially recorded in our balance sheet, depending on the final accounting for the Marysville business combination. On April 18, 2011, we made an estimated federal tax payment of $29.3 million related to our $35 million tax liability that resulted from our acquisition of Marysville. The remaining $5.7 million estimated tax payable is included in other current liabilities in our condensed consolidated balance sheet as of June 30, 2011.

7

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

We have updated our accounting for the Marysville business combination for the fair value of assets acquired and liabilities assumed including intangible assets and property, plant and equipment and goodwill. The purchase price allocation is preliminary and is based on initial estimates of fair values at the date of the acquisition. We are currently evaluating the preliminary purchase price allocation, which will be adjusted as additional information relative to the fair value of assets and liabilities becomes available. This allocation may change in subsequent financial statements pending the final estimates of fair value and the final outcome of our estimated tax liabilities. The preliminary purchase price allocation as of June 30, 2011 is as follows:

	June 30,
	2011
	(Millions)
Aggregate consideration	$	100.8
Cash		3.1
Accounts receivable		0.7
Inventory		4.6
Other current assets		0.7
Property, plant and equipment		57.1
Intangible assets		33.0
Goodwill		39.7
Other long-term assets		1.2
Other current liabilities		(4.3	)
Long-term liabilities		(35.0	)
Total preliminary purchase price allocation	$	100.8

8

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Combined Financial Information

The results of our 33.33% interest in Southeast Texas are included in the condensed consolidated statements of operations for the three and six months ended June 30, 2011 and 2010. The following table presents the previously reported condensed consolidated statements of operations for the three and six months ended June 30, 2010, adjusted for the acquisition of a 33.33% interest in Southeast Texas from DCP Midstream, LLC:

Three Months Ended June 30, 2010

	DCP Midstream Partners, LP (As previously reported)			Southeast Texas (a)			Combined DCP Midstream Partners, LP (As currently reported)
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	228.0		$	—		$	228.0
Transportation, processing and other		27.0			—			27.0
Gains from commodity derivative activity, net		22.5			—			22.5
Total operating revenues		277.5			—			277.5
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		205.7			—			205.7
Operating and maintenance expense		20.6			—			20.6
Depreciation and amortization expense		18.7			—			18.7
General and administrative expense and other		8.2			—			8.2
Other income		(3.5	)		—			(3.5	)
Total operating costs and expenses		249.7			—			249.7
Operating income		27.8			—			27.8
Interest expense, net		(7.3	)		—			(7.3	)
Earnings from unconsolidated affiliates		6.6			(0.2	)		6.4
Income before income taxes		27.1			(0.2	)		26.9
Income tax expense		(0.1	)		—			(0.1	)
Net income		27.0			(0.2	)		26.8
Net income attributable to noncontrolling interests		(1.0	)		—			(1.0	)
Net income attributable to partners	$	26.0		$	(0.2	)	$	25.8

(a) The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC’s respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

9

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Six Months Ended June 30, 2010

	DCP Midstream Partners, LP (As previously reported)			Southeast Texas (a)(b)		Combined DCP Midstream Partners, LP (As currently reported)
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	598.4		$	—	$	598.4
Transportation, processing and other		54.3			—		54.3
Gains from commodity derivative activity, net		28.5			—		28.5
Total operating revenues		681.2			—		681.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		538.5			—		538.5
Operating and maintenance expense		39.6			—		39.6
Depreciation and amortization expense		36.5			—		36.5
General and administrative expense and other		16.8			—		16.8
Other income		(3.5	)		—		(3.5	)
Total operating costs and expenses		627.9			—		627.9
Operating income		53.3			—		53.3
Interest expense, net		(14.5	)		—		(14.5	)
Earnings from unconsolidated affiliates		14.5			6.3		20.8
Income before income taxes		53.3			6.3		59.6
Income tax expense		(0.4	)		—		(0.4	)
Net income		52.9			6.3		59.2
Net income attributable to noncontrolling interests		(1.1	)		—		(1.1	)
Net income attributable to partners	$	51.8		$	6.3	$	58.1

(a) The results of our 33.33% interest in Southeast Texas for the six months ended June 30, 2010 includes the impact of Hurricane Ike business interruption insurance recoveries.

(b) The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC’s respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

The results of operations for acquisitions accounted for as a business combination are included in the DCP Midstream Partners, LP results subsequent to the date of acquisition. Accordingly, for the three and six months ended June 30, 2011 total operating revenues of $5.3 million and $15.9 million, respectively, and net income attributable to the Partnership of $4.2 million and $7.7 million, respectively, associated with Marysville, are included in the condensed consolidated statement of operations. Pro forma information is presented for comparative periods prior to the date of acquisition, however, comparative periods in the condensed consolidated financial statements are not adjusted to include the results of the acquisition.

The following table presents unaudited pro forma information for the condensed consolidated statement of operations for the three and six months ended June 30, 2010, as if the acquisition of Marysville had occurred at the beginning of the period presented.

10

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Three Months Ended June 30, 2010								Six Months Ended June 30, 2010
	DCP Midstream Partners, LP			Acquisition of Marysville		DCP Midstream Partners, LP Pro Forma			DCP Midstream Partners, LP			Acquisition of Marysville		DCP Midstream Partners, LP Pro Forma
	(Millions, except per unit amounts)
Total operating revenues	$	277.5		$	6.2	$	283.7		$	681.2		$	14.8	$	696.0
Net income attributable to partners	$	25.8		$	2.3		28.1		$	58.1		$	6.3	$	64.4
Less:
Net loss (income) attributable to predecessor operations		0.2			—		0.2			(6.3	)		—		(6.3	)
General partner unitholders interest in net income		(4.2	)		—		(4.2	)		(8.0	)		—		(8.0	)
Net income allocable to limited partners	$	21.8		$	2.3	$	24.1		$	43.8		$	6.3	$	50.1
Net income per limited partner unit — basic and diluted	$	0.63		$	0.07	$	0.70		$	1.27		$	0.18	$	1.45

The pro forma information is not intended to reflect actual results that would have occurred if the acquired business had been combined during the period presented, nor is it intended to be indicative of the results of operations that may be achieved by us in the future.

4. Agreements and Transactions with Affiliates

DCP Midstream, LLC

Omnibus Agreement and Other General and Administrative Charges

We have entered into an omnibus agreement, as amended, or the Omnibus Agreement, with DCP Midstream, LLC. In January 2011, we extended the omnibus agreement through December 31, 2011 for an annual amount of $10.2 million.

Following is a summary of the fees we incurred under the Omnibus Agreement as well as other fees paid to DCP Midstream, LLC:

	Three Months Ended June  30,				Six Months Ended June  30,
	2011		2010		2011		2010
	(Millions)
Omnibus Agreement	$	2.5	$	2.4	$	5.0	$	4.9
Other fees — DCP Midstream, LLC		2.3		2.4		4.5		4.7
Total — DCP Midstream, LLC	$	4.8	$	4.8	$	9.5	$	9.6

Under the Omnibus Agreement, we are required to reimburse DCP Midstream, LLC for salaries of operating personnel and employee benefits as well as capital expenditures, maintenance and repair costs, taxes and other direct costs incurred by DCP Midstream, LLC on our behalf. We also pay DCP Midstream, LLC for certain costs incurred and centralized corporate functions performed by DCP Midstream, LLC on our behalf, including legal, accounting, cash management, insurance administration and claims processing, risk management, health, safety and environmental, information technology, human resources, credit, payroll, taxes and engineering. The Omnibus Agreement also addresses the following matters:

• DCP Midstream, LLC’s obligation to indemnify us for certain liabilities and our obligation to indemnify DCP Midstream, LLC for certain liabilities; and

• DCP Midstream, LLC’s obligation to continue to maintain its credit support, including without limitation guarantees and letters of credit, for our obligations related to commercial contracts with respect to its business or operations that were in effect at the closing of our initial public offering until the expiration of such contracts.

11

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Any or all of the provisions of the Omnibus Agreement, other than the indemnification provisions, will be terminable by DCP Midstream, LLC at its option if the general partner is removed without cause and units held by the general partner and its affiliates are not voted in favor of that removal. The Omnibus Agreement will also terminate in the event of a change of control of us, the general partner (DCP Midstream GP, LP) or the General Partner (DCP Midstream GP, LLC).

East Texas incurs general and administrative expenses directly from DCP Midstream, LLC. East Texas incurred $1.9 million and $1.9 million for the three months ended June 30, 2011 and 2010, respectively, and $3.8 million and $3.9 million for the six months ended June 30, 2011 and 2010, respectively, for general and administrative expenses from DCP Midstream, LLC.

In addition to the Omnibus Agreement and amounts incurred by East Texas, we incurred other general and administrative fees with DCP Midstream, LLC of $0.4 million and $0.5 million for the three months ended June 30, 2011 and 2010, respectively, and $0.7 million and $0.8 million for the six months ended June 30, 2011 and 2010, respectively. These amounts include allocated expenses, including professional services, insurance and internal audit.

Other Agreements and Transactions with DCP Midstream, LLC

DCP Midstream, LLC was a significant customer during the three and six months ended June 30, 2011 and 2010.

We sell a portion of our residue gas, NGLs and condensate to, purchase natural gas and other petroleum products from, and provide gathering and transportation services for, DCP Midstream, LLC. We anticipate continuing to purchase from and sell commodities to DCP Midstream, LLC in the ordinary course of business. In addition, DCP Midstream, LLC conducts derivative activities on our behalf.

We have a contractual arrangement with DCP Midstream, LLC, through March 2022, in which we pay DCP Midstream, LLC a fee for processing services associated with the gas we gather on our Southern Oklahoma system, which is part of our Natural Gas Services segment. In addition, in February 2010, a contract was signed with DCP Midstream, LLC providing for adjustments to those fees based upon plant efficiencies related to our portion of volumes from the Southern Oklahoma system being processed at DCP Midstream, LLC’s plant through March 2022. We generally report fees associated with these activities in the condensed consolidated statements of operations as purchases of natural gas, propane, NGLs and condensate from affiliates. In addition, as part of this arrangement, DCP Midstream, LLC pays us a fee for certain gathering services. We generally report revenues associated with these activities in the condensed consolidated statements of operations as transportation, processing and other to affiliates.

DCP Midstream, LLC owns certain assets and is party to certain contractual relationships around our Pelico system, included in our Northern Louisiana system, which is part of our Natural Gas Services segment, that are periodically used for the benefit of Pelico. DCP Midstream, LLC is able to source natural gas upstream of Pelico and deliver it to us and is able to take natural gas from the outlet of the Pelico system and market it downstream of Pelico. We purchase natural gas from DCP Midstream, LLC upstream of Pelico and transport it to Pelico under a firm transportation agreement with an affiliate. Our purchases from DCP Midstream, LLC are at DCP Midstream, LLC’s actual acquisition cost plus any transportation service charges. Volumes that exceed our on-system demand are sold to DCP Midstream, LLC at an index-based price, less contractually agreed to marketing fees. Revenues associated with these activities are reported gross in our condensed consolidated statements of operations as sales of natural gas, propane, NGLs and condensate to affiliates.

In conjunction with our acquisition of a 33.33% interest in Southeast Texas from DCP Midstream, LLC for $150.0 million in our Natural Gas Services segment, we entered into a joint venture agreement. The terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC’s respective ownership interests in Southeast Texas. This transaction closed on January 1, 2011.

In conjunction with our acquisition of a 50.1% limited liability company interest in East Texas, which is part of our Natural Gas Services segment, we entered into agreements with DCP Midstream, LLC whereby DCP Midstream, LLC will reimburse East Texas for certain expenditures on East Texas capital projects. These reimbursements are for certain capital projects which have commenced within three years from the respective acquisition dates. DCP Midstream, LLC made capital contributions to East Texas for capital projects of $2.7 million and $5.3 million for the three months ended June 30, 2011 and 2010, respectively, and $5.6 million and $9.1 million for the six months ended June 30, 2011 and 2010, respectively.

12

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

On September 16, 2010, we entered into an agreement with DCP Midstream, LLC to sell certain surplus equipment at Collbran, part of our Natural Gas Services segment, with a net book value of $6.2 million for net proceeds of $3.6 million. The surplus equipment is the result of a consolidation of operations at our Anderson Gulch plant in the Piceance Basin. The net proceeds of $3.6 million were distributed 75% to us and 25% to the noncontrolling interest in Collbran, based upon proportionate ownership, during the year ended December 31, 2010. The sale was completed when title to the surplus equipment passed to DCP Midstream, LLC in March 2011. We have recognized a distribution of $2.6 million for the six months ended June 30, 2011 to DCP Midstream, LLC in our condensed consolidated statements of changes in equity representing the difference between the net book value and the proceeds received for the surplus equipment.

In June 2011, East Texas reached a $7.0 million settlement with the responsible third party, related to the first quarter 2009 fire that was caused by a third party underground pipeline rupture outside of our property, or the East Texas recovery settlement. We have allocated the settlement based upon relative ownership percentages at the time the losses were incurred, factoring in amounts previously reimbursed to us by DCP Midstream, LLC. Under the agreement, DCP Midstream, LLC will retain $1.2 million of the proceeds for reimbursement of amounts previously paid to us, and we recognized $1.6 million of the remaining $5.8 million in “net income”. We have recorded a $1.2 million payable to DCP Midstream, LLC in “other current liabilities” in our condensed consolidated balance sheet and $5.8 million to our condensed consolidated statement of operations in “sales of natural gas, propane, NGLs and condensate”, with $4.2 million representing DCP Midstream, LLC’s portion in “net income attributable to noncontrolling interests”, for the three and six months ended June 30, 2011. We expect to receive cash related to the settlement in the second half of 2011.

In our Natural Gas Services segment, we sell NGLs processed at certain of our plants, and sell condensate removed from the gas gathering systems that deliver to certain of our systems under contracts to a subsidiary of DCP Midstream, LLC equal to that subsidiary’s net weighted-average sales price, adjusted for transportation, processing and other charges from the tailgate of the respective asset.

In our NGL Logistics segment, we also have a contractual arrangement with a subsidiary of DCP Midstream, LLC that provides that DCP Midstream, LLC will pay us to transport NGLs over our Seabreeze and Wilbreeze pipelines, pursuant to fee-based rates that will be applied to the volumes transported. DCP Midstream, LLC is the sole shipper on these pipelines under the transportation agreements. We generally report revenues associated with these activities in the condensed consolidated statements of operations as transportation, processing and other to affiliates.

In conjunction with our acquisition of the Wattenberg pipeline, which is part of our NGL Logistics segment, we signed a transportation agreement with DCP Midstream, LLC pursuant to fee-based rates that will be applied to the volumes transported, which was effective through December 31, 2010. Effective January 1, 2011, we entered into a 10-year dedication and transportation agreement with a subsidiary of DCP Midstream, LLC whereby certain NGL volumes produced at several of DCP Midstream, LLC’s processing facilities are dedicated for transportation on the Wattenberg pipeline. We collect fee-based transportation revenues under our tariff. We generally report revenues associated with these activities in the condensed consolidated statements of operations as transportation, processing and other to affiliates.

In conjunction with our acquisition of our DJ Basin NGL Fractionators in our NGL Logistics segment, we pay a fee to DCP Midstream, LLC to operate our DJ Basin NGL Fractionators and receive fees for the processing of DCP Midstream, LLC’s committed NGLs produced by them in Weld County at our DJ Basin NGL Fractionators under agreements that are effective through March 2018.

DCP Midstream, LLC has issued parental guarantees, totaling $95.0 million as of June 30, 2011, in favor of certain counterparties to our commodity derivative instruments to mitigate a portion of our collateral requirements with those counterparties. We pay DCP Midstream, LLC interest of 0.5% per annum on these outstanding guarantees.

DCP Midstream, LLC has issued parental guarantees for its 49.9% limited liability company interest in East Texas, totaling $6.0 million as of June 30, 2011, in favor of certain counterparties to processing and transportation agreements at East Texas. Concurrently, we issued similar guarantees for our 50.1% interest.

13

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Spectra Energy

We have propane supply agreements with Spectra Energy, effective through April 2012, which provide us propane supply at our marine terminals, which are included in our Wholesale Propane Logistics segment, for up to approximately 185 million gallons of propane annually. Additionally, we have transportation agreements with Spectra Energy, effective through January 2012, which provide natural gas transportation to our Pelico system in our Natural Gas Services segment, for approximately 35 MMcf/d.

ConocoPhillips

We have multiple agreements with ConocoPhillips and its affiliates. The agreements include fee-based and percent-of-proceeds gathering and processing arrangements, and gas purchase and gas sales agreements. We anticipate continuing to purchase from and sell to ConocoPhillips and its affiliates in the ordinary course of business. In addition, we may be reimbursed by ConocoPhillips for certain capital projects where the work is performed by us. We received $0.2 million of capital reimbursements during the three and six months ended June 30, 2010 and did not receive any capital reimbursements during the three and six months ended June 30, 2011.

Summary of Transactions with Affiliates

The following table summarizes transactions with affiliates:

	Three Months Ended June  30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
DCP Midstream, LLC:
Sales of natural gas, propane, NGLs and condensate	$	158.9		$	131.9		$	290.0		$	265.5
Transportation, processing and other	$	6.3		$	2.7		$	9.5		$	6.5
Purchases of natural gas, propane and NGLs	$	35.5		$	23.7		$	98.5		$	86.5
Losses from commodity derivative activity, net	$	(0.6	)	$	(0.3	)	$	(1.9	)	$	(0.3	)
General and administrative expense	$	4.8		$	4.8		$	9.5		$	9.6
Interest expense	$	—		$	0.1		$	—		$	0.2
Spectra Energy:
Transportation, processing and other	$	—		$	0.2		$	—		$	0.2
Purchases of natural gas, propane and NGLs	$	46.5		$	2.3		$	131.7		$	76.4
Other income	$	—		$	3.0		$	—		$	3.0
ConocoPhillips:
Sales of natural gas, propane, NGLs and condensate	$	8.9		$	2.9		$	10.0		$	4.3
Transportation, processing and other	$	1.8		$	2.0		$	3.7		$	3.9
Purchases of natural gas, propane and NGLs	$	2.1		$	1.6		$	3.5		$	3.6
General and administrative expense	$	0.1		$	—		$	0.2		$	0.1
Unconsolidated affiliates:
Purchases of natural gas, propane and NGLs	$	—		$	—		$	3.1		$	2.4

14

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

We had balances with affiliates as follows:

	June 30, 2011			December 31, 2010
	(Millions)
DCP Midstream, LLC:
Accounts receivable	$	70.3		$	60.1
Accounts payable	$	26.4		$	27.0
Unrealized gains on derivative instruments — current	$	0.1		$	1.3
Unrealized losses on derivative instruments — current	$	(1.6	)	$	(1.8	)
Spectra Energy:
Accounts payable	$	2.3		$	8.7
ConocoPhillips:
Accounts receivable	$	3.9		$	1.6
Accounts payable	$	0.5		$	1.0
Unconsolidated affiliates:
Accounts payable	$	—		$	0.9

5. Property, Plant and Equipment

A summary of property, plant and equipment by classification is as follows:

	Depreciable		June 30,			December 31,
	Life		2011			2010
			(Millions)
Gathering and transmission systems		15 — 30 Years	$	997.9		$	992.0
Processing, storage, and terminal facilities		20 — 50 Years		542.9			513.2
Other		0 — 30 Years		14.6			12.6
Construction work in progress				59.7			42.1
Property, plant and equipment				1,615.1			1,559.9
Accumulated depreciation				(499.8	)		(462.8	)
Property, plant and equipment, net			$	1,115.3		$	1,097.1

Interest capitalized on construction projects for the six months ended June 30, 2011 was $0.5 million and for the year ended December 31, 2010 was $0.2 million.

Depreciation expense was $18.6 million and $18.0 million for the three months ended June 30, 2011 and 2010, respectively, and $37.0 million and $35.0 million for the six months ended June 30, 2011 and 2010, respectively.

Asset Retirement Obligations — As of June 30, 2011, we had asset retirement obligations of $11.1 million included in other long-term liabilities in the consolidated balance sheet. As of December 31, 2010, we had asset retirement obligations of $10.8 million included in other long-term liabilities in the consolidated balance sheet. Accretion expense was $0.1 million and $0.1 million for the three months ended June 30, 2011 and 2010, respectively, and $0.3 million and $0.2 million for the six months ended June 30, 2011 and 2010, respectively.

15

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

6. Goodwill and Intangible Assets

The change in the carrying amount of goodwill is as follows:

	June 30,		December 31,
	2011		2010
	(Millions)
Beginning of period	$	139.3	$	92.1
Acquisitions		7.6		47.2
End of period	$	146.9	$	139.3

The carrying value of goodwill as of June 30, 2011 and December 31, 2010 was $70.3 million and $62.8 million, respectively, for our Natural Gas Services segment, $36.9 million as of both periods for our Wholesale Propane Logistics segment, and $39.7 million as of both periods for our NGL logistics segment.

Goodwill increased in 2011 by $7.6 million primarily as a result of a purchase price adjustment related to a contingent payment in conjunction with our 2008 Michigan System acquisition.

Intangible assets consist of customer contracts, including commodity purchase, transportation and processing contracts, and related relationships. The gross carrying amount and accumulated amortization of these intangible assets are included in the accompanying consolidated balance sheets as intangible assets, net, and are as follows:

	June 30,			December 31,
	2011			2010
	(Millions)
Gross carrying amount	$	129.4		$	128.7
Accumulated amortization		(12.4	)		(9.4	)
Intangible assets, net	$	117.0		$	119.3

We recorded amortization expense of $1.5 million and $0.7 million for the three months ended June 30, 2011 and 2010, respectively, and $3.0 million and $1.5 million for the six months ended June 30, 2011 and 2010, respectively. As of June 30, 2011, the remaining amortization periods ranged from approximately 10 years to 24 years, with a weighted-average remaining period of approximately 20 years.

The weighted-average remaining amortization is 20 years for the $33.0 million of intangible assets acquired with our Marysville acquisition.

Estimated future amortization for these intangible assets is as follows:

Estimated Future Amortization
(Millions)
Remainder of 2011	$	3.1
2012		6.0
2013		6.0
2014		6.0
2015		6.0
Thereafter		89.9
Total	$	117.0

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DCP MIDSTREAM PARTNERS, LP

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(Unaudited)

7. Investments in Unconsolidated Affiliates

The following table summarizes our investments in unconsolidated affiliates:

	Percentage of Ownership as of June 30, 2011 and December 31, 2010	Carrying Value as of
		June 30, 2011		December 31, 2010
		(Millions)
Discovery Producer Services LLC	40%	$	103.5	$	104.1
Southeast Texas	33%		114.8		112.6
Other	50%		0.2		0.2
Total investments in unconsolidated affiliates		$	218.5	$	216.9

There was a deficit between the carrying amount of the investment and the underlying equity of Discovery of $33.9 million and $35.1 million at June 30, 2011 and December 31, 2010, respectively, which is associated with, and is being accreted over, the life of the underlying long-lived assets of Discovery.

Earnings from investments in unconsolidated affiliates were as follows:

	Three Months Ended June  30,					Six Months Ended June  30,
	2011		2010 (a)			2011		2010 (a)
	(Millions)
Discovery Producer Services LLC	$	5.7	$	6.3		$	10.2	$	13.7
Southeast Texas		4.3		(0.2	)		8.4		6.3
Black Lake Pipe Line Company and other		—		0.3			—		0.8
Total earnings from unconsolidated affiliates	$	10.0	$	6.4		$	18.6	$	20.8

(a) As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

The following summarizes combined financial information of our investments in unconsolidated affiliates:

	Three Months Ended June  30,				Six Months Ended June  30,
	2011 (a)		2010 (b)		2011 (a)		2010 (b)
	(Millions)
Statements of operations:
Operating revenue	$	233.1	$	215.8	$	493.0	$	518.4
Operating expenses	$	210.9	$	201.6	$	451.0	$	466.3
Net income	$	22.1	$	14.2	$	41.7	$	52.2

(a) The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

(b) The combined financial information for the three and six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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(Unaudited)

	June 30, 2011 (a)			December 31, 2010 (a) (b)
	(Millions)
Balance sheets:
Current assets	$	112.6		$	153.0
Long-term assets		702.8			684.9
Current liabilities		(68.2	)		(121.4	)
Long-term liabilities		(30.3	)		(30.3	)
Net assets	$	716.9		$	686.2

(a) The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

(b) The combined financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

8. Fair Value Measurement

Determination of Fair Value

Below is a general description of our valuation methodologies for derivative financial assets and liabilities which are measured at fair value. Fair values are generally based upon quoted market prices, where available. If listed market prices or quotes are not available, we determine fair value based upon a market quote, adjusted by other market-based or independently sourced market data such as historical commodity volatilities, crude oil future yield curves, and/or counterparty specific considerations. These adjustments result in a fair value for each asset or liability under an “exit price” methodology, in line with how we believe a marketplace participant would value that asset or liability. These adjustments may include amounts to reflect counterparty credit quality, the effect of our own creditworthiness, the time value of money and/or the liquidity of the market.

• Counterparty credit valuation adjustments are necessary when the market price of an instrument is not indicative of the fair value as a result of the credit quality of the counterparty. Generally, market quotes assume that all counterparties have near zero, or low, default rates and have equal credit quality. Therefore, an adjustment may be necessary to reflect the credit quality of a specific counterparty to determine the fair value of the instrument. We record counterparty credit valuation adjustments on all derivatives that are in a net asset position as of the measurement date in accordance with our established counterparty credit policy, which takes into account any collateral margin that a counterparty may have posted with us as well as any letters of credit that they have provided.

• Entity valuation adjustments are necessary to reflect the effect of our own credit quality on the fair value of our net liability position with each counterparty. This adjustment takes into account any credit enhancements, such as collateral margin we may have posted with a counterparty, as well as any letters of credit that we have provided. The methodology to determine this adjustment is consistent with how we evaluate counterparty credit risk, taking into account our own credit rating, current credit spreads, as well as any change in such spreads since the last measurement date.

• Liquidity valuation adjustments are necessary when we are not able to observe a recent market price for financial instruments that trade in less active markets for the fair value to reflect the cost of exiting the position. Exchange traded contracts are valued at market value without making any additional valuation adjustments and, therefore, no liquidity reserve is applied. For contracts other than exchange traded instruments, we mark our positions to the midpoint of the bid/ask spread, and record a liquidity reserve based upon our total net position. We believe that such practice results in the most reliable fair value measurement as viewed by a market participant.

We manage our derivative instruments on a portfolio basis and the valuation adjustments described above are calculated on this basis. We believe that the portfolio level approach represents the highest and best use for these assets as there are benefits inherent in naturally offsetting positions within the portfolio at any given time, and this approach is consistent with how a market participant would view and value the assets and liabilities. Although we take a portfolio approach to managing these assets/liabilities, in order to reflect the fair value of any one individual contract within the portfolio, we allocate all valuation adjustments down to the contract level, to the extent deemed necessary, based upon either the notional contract volume, or the contract value, whichever is more applicable.

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DCP MIDSTREAM PARTNERS, LP

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(Unaudited)

The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While we believe that our valuation methods are appropriate and consistent with other market participants, we recognize that the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. We review our fair value policies on a regular basis taking into consideration changes in the marketplace and, if necessary, will adjust our policies accordingly. See Note 10 Risk Management and Hedging Activities.

Valuation Hierarchy

Our fair value measurements are grouped into a three-level valuation hierarchy. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows.

• Level 1 — inputs are unadjusted quoted prices for identical assets or liabilities in active markets.

• Level 2 — inputs include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

• Level 3 — inputs are unobservable and considered significant to the fair value measurement.

A financial instrument’s categorization within the hierarchy is based upon the input that requires the highest degree of judgment in the determination of the instrument’s fair value. Following is a description of the valuation methodologies used as well as the general classification of such instruments pursuant to the hierarchy.

Commodity Derivative Assets and Liabilities

We enter into a variety of derivative financial instruments, which may include over the counter, or OTC, instruments, such as natural gas, crude oil or NGL contracts.

Within our Natural Gas Services segment we typically use OTC derivative contracts in order to mitigate a portion of our exposure to natural gas, NGL and condensate price changes. We also may enter into natural gas derivatives to lock in margin around our storage and transportation assets. These instruments are generally classified as Level 2. Depending upon market conditions and our strategy, we may enter into OTC derivative positions with a significant time horizon to maturity, and market prices for these OTC derivatives may only be readily observable for a portion of the duration of the instrument. In order to calculate the fair value of these instruments, readily observable market information is utilized to the extent that it is available; however, in the event that readily observable market data is not available, we may interpolate or extrapolate based upon observable data. In instances where we utilize an interpolated or extrapolated value, and it is considered significant to the valuation of the contract as a whole, we would classify the instrument within Level 3.

Within our Wholesale Propane Logistics segment, we may enter into a variety of financial instruments to either secure sales or purchase prices, or capture a variety of market opportunities. Since financial instruments for NGLs tend to be counterparty and location specific, we primarily use the OTC derivative instrument markets, which are not as active and liquid as exchange traded instruments. Market quotes for such contracts may only be available for short dated positions (up to six months), and an active market itself may not exist beyond such time horizon. Contracts entered into with a relatively short time horizon for which prices are readily observable in the OTC market are generally classified within Level 2. Contracts with a longer time horizon, for which we internally generate a forward curve to value such instruments, are generally classified within Level 3. The internally generated curve may utilize a variety of assumptions including, but not limited to, historical and future expected relationship of NGL prices to crude oil prices, the knowledge of expected supply sources coming on line, expected weather trends within certain regions of the United States, and the future expected demand for NGLs.

Each instrument is assigned to a level within the hierarchy at the end of each financial quarter depending upon the extent to which the valuation inputs are observable. Generally, an instrument will move toward a level within the hierarchy that requires a lower degree of judgment as the time to maturity approaches, and as the markets in which the asset trades will likely become more liquid and prices more readily available in the market, thus reducing the need to rely upon our internally developed assumptions. However, the level of a given instrument may change, in either direction, depending upon market conditions and the availability of market observable data.

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DCP MIDSTREAM PARTNERS, LP

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(Unaudited)

Interest Rate Derivative Assets and Liabilities

We use interest rate swap agreements as part of our overall capital strategy. These instruments effectively exchange a portion of our floating rate debt for fixed rate debt. The swaps are generally priced based upon a London Interbank Offered Rate, or LIBOR, instrument with similar duration, adjusted by the credit spread between our company and the LIBOR instrument. Given that a portion of the swap value is derived from the credit spread, which may be observed by comparing similar assets in the market, these instruments are classified within Level 2. Default risk on either side of the swap transaction is also considered in the valuation. We record counterparty credit and entity valuation adjustments in the valuation of our interest rate swaps; however, these reserves are not considered to be a significant input to the overall valuation.

Nonfinancial Assets and Liabilities

We utilize fair value on a non-recurring basis to perform impairment tests as required on our property, plant and equipment, goodwill and intangible assets. Assets and liabilities acquired in business combinations are recorded at their fair value as of the date of acquisition. The inputs used to determine such fair value are primarily based upon internally developed cash flow models and would generally be classified within Level 3, in the event that we were required to measure and record such assets at fair value within our condensed consolidated financial statements. Additionally, we use fair value to determine the inception value of our asset retirement obligations. The inputs used to determine such fair value are primarily based upon costs incurred historically for similar work, as well as estimates from independent third parties for costs that would be incurred to restore leased property to the contractually stipulated condition, and would generally be classified within Level 3.

We utilize fair value on a recurring basis to measure our contingent consideration that is a result of certain acquisitions. The inputs used to determine such fair value are primarily based upon internally developed cash flow models and are classified within Level 3.

The following table presents the financial instruments carried at fair value as of June 30, 2011 and December 31, 2010, by consolidated balance sheet caption and by valuation hierarchy as described above:

	June 30, 2011											December 31, 2010
	Level 1		Level 2			Level 3			Total Carrying Value			Level 1		Level 2			Level 3			Total Carrying Value
	(Millions)
Current assets:
Commodity derivatives (a)	$	—	$	0.7		$	0.6		$	1.3		$	—	$	1.6		$	0.3		$	1.9
Long-term assets:
Commodity derivatives (b)	$	—	$	1.4		$	0.3		$	1.7		$	—	$	1.1		$	0.3		$	1.4
Current liabilities (c):
Commodity derivatives	$	—	$	(28.6	)	$	(1.2	)	$	(29.8	)	$	—	$	(25.9	)	$	(0.1	)	$	(26.0	)
Interest rate derivatives	$	—	$	(17.2	)	$	—		$	(17.2	)	$	—	$	(17.0	)	$	—		$	(17.0	)
Long-term liabilities (d):
Commodity derivatives	$	—	$	(47.8	)	$	(0.3	)	$	(48.1	)	$	—	$	(39.9	)	$	(0.5	)	$	(40.4	)
Interest rate derivatives	$	—	$	(4.5	)	$	—		$	(4.5	)	$	—	$	(9.9	)	$	—		$	(9.9	)

(a) Included in current unrealized gains on derivative instruments in our condensed consolidated balance sheets.

(b) Included in long-term unrealized gains on derivative instruments in our condensed consolidated balance sheets.

(c) Included in current unrealized losses on derivative instruments in our condensed consolidated balance sheets.

(d) Included in long-term unrealized losses on derivative instruments in our condensed consolidated balance sheets.

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DCP MIDSTREAM PARTNERS, LP

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(Unaudited)

Changes in Level 3 Fair Value Measurements

The tables below illustrate a rollforward of the amounts included in our condensed consolidated balance sheets for derivative financial instruments that we have classified within Level 3. The determination to classify a financial instrument within Level 3 is based upon the significance of the unobservable factors used in determining the overall fair value of the instrument. Since financial instruments classified as Level 3 typically include a combination of observable components (that is, components that are actively quoted and can be validated to external sources) and unobservable components, the gains and losses in the table below may include changes in fair value due in part to observable market factors, or changes to our assumptions on the unobservable components. Depending upon the information readily observable in the market, and/or the use of unobservable inputs, which are significant to the overall valuation, the classification of any individual financial instrument may differ from one measurement date to the next. In the event that there is a movement to/from the classification of an instrument as Level 3, we have reflected such items in the table below within the “Transfers into Level 3” and “Transfers out of Level 3” captions.

We manage our overall risk at the portfolio level, and in the execution of our strategy, we may use a combination of financial instruments, which may be classified within any level. Since Level 1 and Level 2 risk management instruments are not included in the rollforward below, the gains or losses in the table do not reflect the effect of our total risk management activities.

	Commodity Derivative Instruments
	Current Assets			Long-Term Assets		Current Liabilities			Long-Term Liabilities
	(Millions)
Three months ended June 30, 2011 (a):
Beginning balance	$	0.2		$	0.2	$	(2.3	)	$	(2.4	)
Net realized and unrealized gains (losses) included in earnings		0.5			0.1		(1.5	)		0.6
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		1.3			1.5
Settlements		(0.1	)		—		1.3			—
Ending balance	$	0.6		$	0.3	$	(1.2	)	$	(0.3	)
Net unrealized losses still held included in earnings (c)	$	0.5		$	0.1	$	(0.2	)	$	0.3
Three months ended June 30, 2010:
Beginning balance	$	1.5		$	1.2	$	(0.3	)	$	(0.4	)
Net realized and unrealized gains included in earnings		—			0.6		0.2			0.2
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			—
Purchases, Issuances and Settlements, net		(0.7	)		—		—			—
Ending balance	$	0.8		$	1.8	$	(0.1	)	$	(0.2	)
Net unrealized gains still held included in earnings (c)	$	(0.1	)	$	0.7	$	—		$	0.1

(a)    There were no purchases, issuances and sales for the three months ended June 30, 2011.

(b)    Amounts transferred in and amounts transferred out are reflected at fair value as of the end of the period.

(c)    Represents the amount of total gains or losses for the period, included in gains or losses from commodity derivative activity, net, attributable to change in unrealized gains or losses relating to assets and liabilities classified as Level 3 that are still held as of June 30, 2011 and 2010.

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DCP MIDSTREAM PARTNERS, LP

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(Unaudited)

	Commodity Derivative Instruments
	Current Assets			Long-Term Assets		Current Liabilities			Long-Term Liabilities
	(Millions)
Six months ended June 30, 2011 (a):
Beginning balance	$	0.3		$	0.3	$	(0.1	)	$	(0.5	)
Net realized and unrealized gains (losses) included in earnings		0.5			—		(1.2	)		(1.2	)
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			1.4
Settlements		(0.2	)		—		0.1			—
Ending balance	$	0.6		$	0.3	$	(1.2	)	$	(0.3	)
Net unrealized gains still held included in earnings (c)	$	0.5		$	—	$	(1.2	)	$	0.1
Six months ended June 30, 2010:
Beginning balance	$	0.4		$	0.2	$	(0.8	)	$	(0.4	)
Net realized and unrealized gains included in earnings		1.0			1.6		—			0.2
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			—
Purchases, Issuances and Settlements, net		(0.6	)		—		0.7			—
Ending balance	$	0.8		$	1.8	$	(0.1	)	$	(0.2	)
Net unrealized losses still held included in earnings (c)	$	0.7		$	1.6	$	—		$	0.1

(a) There were no purchases, issuances and sales for the six months ended June 30, 2011.

(b) Amounts transferred in and amounts transferred out are reflected at fair value as of the end of the period.

(c) Represents the amount of total gains or losses for the period, included in gains or losses from commodity derivative activity, net, attributable to change in unrealized gains or losses relating to assets and liabilities classified as Level 3 that are still held as of June 30, 2011 and 2010.

During the six months ended June 30, 2010, we recognized the fair value of our contingent consideration, which is classified as Level 3, in relation to our acquisition of an additional 5% interest in Collbran, from Delta Petroleum Corporation of approximately $0.5 million, which we recorded to other current liabilities in our condensed consolidated balance sheet.

During the three and six months ended June 30, 2011, we had no significant transfers into and out of Levels 1 and 2. To qualify as a transfer, the asset or liability must have existed in the previous reporting period and moved into a different level during the current period.

Estimated Fair Value of Financial Instruments

We have determined fair value amounts using available market information and appropriate valuation methodologies. However, considerable judgment is required in interpreting market data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts that we could realize in a current market exchange. The use of different market assumptions and/or estimation methods may have a material effect on the estimated fair value amounts.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The fair value of accounts receivable and accounts payable are not materially different from their carrying amounts because of the short-term nature of these instruments or the stated rates approximating market rates. Unrealized gains and unrealized losses on derivative instruments are carried at fair value. The carrying and fair values of outstanding balances under our Credit Agreement are $461.0 million, and $455.3 million, respectively, as of June 30, 2011, and $398.0 million and $388.9 million, respectively, as of December 31, 2010. The carrying and fair values of our 3.25% Senior Notes are $250.0 million and $251.1 million, respectively, as of June 30, 2011 and $250.0 million and $247.0 million, respectively, as of December 31, 2010. We determine the fair value of our credit facility borrowings based upon the discounted present value of expected future cash flows, taking into account the difference between the contractual borrowing spread and the spread for similar credit facilities available in the marketplace. We determine the fair value of our fixed rate debt based on quotes obtained from bond dealers.

9. Debt

Long-term debt was as follows:

	June 30, 2011			December 31, 2010
	(Millions)
Credit Facility
Revolving credit facility, weighted-average variable interest rate of 0.67% and 1.14%, respectively, and net effective interest rate of 4.31% and 4.28%, respectively, due June 21, 2012 (a)	$	461.0		$	398.0
Debt Securities
Issued September 30, 2010, interest at 3.25% payable semi-annually, due October 1, 2015		250.0			250.0
Unamortized discount		(0.2	)		(0.2	)
Total debt	$	710.8		$	647.8
Current maturities		(461.0	)		—
Total long-term debt		249.8			647.8

(a) $450.0 million of debt has been swapped to a fixed rate obligation with effective fixed rates ranging from 2.94% to 5.19%, for a net effective rate of 4.31% on the $461.0 million of outstanding debt under our revolving credit facility as of June 30, 2011.

Credit Agreement

We have an $850.0 million revolving credit facility that matures June 21, 2012, or the Credit Agreement.

As of June 30, 2011 and December 31, 2010, we had $1.1 million and $32.1 million, respectively, of letters of credit issued under the Credit Agreement. As of June 30, 2011, the unused capacity under the revolving credit facility was $387.9 million, of which approximately $367.0 million was available for general working capital purposes.

Our borrowing capacity is limited at June 30, 2011 by the Credit Agreement’s financial covenant requirements. Except in the case of a default, amounts borrowed under our credit facility will not mature prior to the June 21, 2012 maturity date.

Under the Credit Agreement, indebtedness under the revolving credit facility bears interest at either: (1) the higher of Wells Fargo Bank’s prime rate or the Federal Funds rate plus 0.50%; or (2) LIBOR plus an applicable margin, which ranges from 0.23% to 0.575% dependent upon our credit rating. The revolving credit facility incurs an annual facility fee of 0.07% to 0.175% depending on our credit rating. This fee is paid on drawn and undrawn portions of the revolving credit facility.

The Credit Agreement requires us to maintain a leverage ratio (the ratio of our consolidated indebtedness to our consolidated EBITDA, in each case as is defined by the Credit Agreement) of not more than 5.0 to 1.0, and on a temporary basis for not more than three consecutive quarters (including the quarter in which such acquisition is consummated) following the consummation of asset acquisitions in the midstream energy business of not more than 5.5 to 1.0.

Debt Securities

On September 30, 2010, we issued $250.0 million of 3.25% Senior Notes due October 1, 2015. We received proceeds of $247.7 million, which are net of underwriters’ fees, related expenses and unamortized discounts of $1.5 million, $0.6 million and $0.2 million, respectively, which we used to repay funds borrowed under the revolver portion of our Credit Facility. Interest on the notes is paid semi-annually on April 1 and October 1 of each year, with the first payment made on April 1, 2011. The notes will mature on October 1, 2015, unless redeemed prior to maturity. The underwriters’ fees and related expenses are deferred in other long-term assets in our condensed consolidated balance sheets and will be amortized over the term of the notes.

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(Unaudited)

The notes are senior unsecured obligations, ranking equally in right of payment with other unsecured indebtedness, including indebtedness under our Credit Facility. We are not required to make mandatory redemption or sinking fund payments with respect to these notes. The securities are redeemable at a premium at our option.

The future maturities of long-term debt in the year indicated are as follows:

	Debt Maturities
	(Millions)
2012	$	—
2013		—
2014		—
2015		250.0
Thereafter		—
Unamortized discount		(0.2	)
Total	$	249.8

Other Agreements

As of June 30, 2011, we had a contingent letter of credit for up to $10.0 million, on which we pay a fee of 0.50% per annum. This facility reduces the amount of cash we may be required to post as collateral. As of June 30, 2011, we had no letters of credit issued on this facility. Any letters of credit issued on this facility will incur a fee of 1.75% per annum and will not reduce the available capacity under our credit facility.

10. Risk Management and Hedging Activities

Our day to day operations expose us to a variety of risks including but not limited to changes in the prices of commodities that we buy or sell, changes in interest rates, and the creditworthiness of each of our counterparties. We manage certain of these exposures with both physical and financial transactions. We have established a comprehensive risk management policy, or Risk Management Policy, and a risk management committee, or the Risk Management Committee, to monitor and manage market risks associated with commodity prices and counterparty credit. The Risk Management Committee is responsible for the overall management of credit risk and commodity price risk, including monitoring exposure limits. The following briefly describes each of the risks that we manage.

Commodity Price Risk

We are exposed to the impact of market fluctuations in the prices of natural gas, NGLs and condensate as a result of our gathering, processing, sales and storage activities. For gathering and processing and storage services, we may receive fees or commodities as payment for these services, depending on the contract type. We enter into derivative financial instruments to mitigate a portion of the risk of weakening natural gas, NGL and condensate prices associated with our gathering, processing and sales activities, thereby stabilizing our cash flows. We have mitigated a portion of our expected commodity price risk associated with our gathering, processing and sales activities through 2016 with commodity derivative instruments. Given the limited liquidity and tenor of the NGL derivatives market, we have primarily utilized crude oil swaps to mitigate a portion of our commodity price exposure for NGLs. For the nearer tenor where there is greater liquidity in the NGL derivatives market, we have periodically also utilized NGL derivatives. Historically, prices of NGLs have been generally related to the price of crude oil, with some exceptions, notably in late 2008 to early 2009, when NGL pricing was at a greater discount to crude oil pricing. When the relationship of NGL prices to crude oil prices is at a discount to historical ranges, we experience additional exposure as a result of the relationship. When our crude oil swaps become short-term in nature, we have periodically converted certain crude oil derivatives to NGL derivatives by entering into offsetting crude oil swaps while adding NGL swaps. Our crude oil and NGL transactions are primarily accomplished through the use of forward contracts that effectively exchange our floating price risk for a fixed price. We also utilize crude oil costless collars that minimize our floating price risk by establishing a fixed price floor and a fixed price ceiling. However, the type of instrument that we use to mitigate a portion of our risk may vary depending upon our risk management objective. These transactions are not designated as hedging instruments for accounting purposes and the change in fair value is reflected within our condensed consolidated statements of operations as a gain or a loss on commodity derivative activity.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

With respect to our Pelico system, we may enter into financial derivatives to lock in transportation margins across the system, or to lock in margins around our leased storage facility to maximize value. This objective may be achieved through the use of physical purchases or sales of gas that are accounted for under accrual accounting. While the physical purchase or sale of gas transactions are accounted for under accrual accounting and any inventory is stated at lower of cost or market, the swaps are not designated as hedging instruments for accounting purposes and any change in fair value of these instruments is reflected within our condensed consolidated statements of operations.

Our Wholesale Propane Logistics segment is generally designed to establish stable margins by entering into supply arrangements that specify prices based on established floating price indices and by entering into sales agreements that provide for floating prices that are tied to our variable supply costs plus a margin. To the extent possible, we match the pricing of our supply portfolio to our sales portfolio in order to lock in value and reduce our overall commodity price risk. However, to the extent that we carry propane inventories or our sales and supply arrangements are not aligned, we are exposed to market variables and commodity price risk. We manage the commodity price risk of our supply portfolio and sales portfolio with both physical and financial transactions. While the majority of our sales and purchases in this segment are index-based, occasionally, we may enter into fixed price sales agreements in the event that a retail propane distributor desires to purchase propane from us on a fixed price basis. In such cases, we may manage this risk with derivatives that allow us to swap our fixed price risk to market index prices that are matched to our market index supply costs. In addition, we may on occasion use financial derivatives to manage the value of our propane inventories. These transactions are not designated as hedging instruments for accounting purposes and the change in value is reflected in the current period within our condensed consolidated statements of operations as a gain or loss on commodity derivative activity.

Our portfolio of commodity derivative activity is primarily accounted for using the mark-to-market method of accounting, whereby changes in fair value are recorded directly to the condensed consolidated statements of operations; however, depending upon our risk profile and objectives, in certain limited cases, we may execute transactions that qualify for the hedge method of accounting.

Commodity Cash Flow Hedges — Effective July 1, 2007, we elected to discontinue using the hedge method of accounting for derivatives that manage our commodity price risk. Prior to July 1, 2007, we used commodity swaps to mitigate a portion of the risk of market fluctuations in the price of NGLs, natural gas and condensate. Given our election to discontinue using the hedge method of accounting, the remaining net losses deferred in accumulated other comprehensive income, or AOCI, relative to cash flow hedges are reclassified to sales of natural gas, propane, NGLs and condensate, through December 2011, as the underlying transactions impact earnings.

On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million and account for our interest as an equity method investment. Southeast Texas commenced an expansion project to build an additional storage cavern. In order for storage facilities to remain operational, a minimum level of base gas must be maintained in each storage cavern. Upon completion of the expansion project, Southeast Texas will be required to purchase a significant amount of base gas to bring the storage cavern to operation. To mitigate the risk associated with this forecasted purchase of natural gas, Southeast Texas executed derivative financial instruments which have been designated as cash flow hedges. Any effective changes in fair value of these derivative instruments will be deferred in AOCI until the underlying purchase of inventory occurs. While the cash paid or received upon settlement of these hedges will economically offset the cash required to purchase the base gas, any deferred gain or loss at the time of the purchase will remain in AOCI until such time that the cavern is emptied and the base gas is sold. We recognize our proportionate share of the Southeast Texas base gas commodity derivative activity in AOCI, with corresponding adjustments to our investment in Southeast Texas.

Interest Rate Risk

We mitigate a portion of our interest rate risk with interest rate swaps that reduce our exposure to market rate fluctuations by converting variable interest rates to fixed interest rates. These interest rate swap agreements convert the interest rate associated with the indebtedness outstanding under our revolving credit facility to a fixed rate obligation, thereby reducing the exposure to market rate fluctuations.

At June 30, 2011, we had interest rate swap agreements totaling $450.0 million, of which we have designated $425.0 million as cash flow hedges and account for the remaining $25.0 million under the mark-to-market method of accounting. As we generally expect to have variable rate debt levels equal to or exceeding our swap positions during their term, the entire $450.0 million of these arrangements generally mitigate our interest rate risk through June 2012, with $150.0 million extending from June 2012 through June 2014. Based on our current operations we believe our interest rate swap agreements adequately mitigate our interest rate risk associated with our variable rate debt.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

We have designated $425.0 million of our interest rate swap agreements as cash flow hedges, and effectiveness is determined by matching the principal balance and terms with that of the specified obligation. The effective portions of changes in fair value are recognized in AOCI in the condensed consolidated balance sheets and are reclassified into earnings as the hedged transactions impact earnings. The effect that these swaps have on our condensed consolidated financial statements, as well as the effect that is expected over the upcoming 12 months is summarized in the charts below. However, due to the volatility of the interest rate markets, the corresponding value in AOCI is subject to change prior to its reclassification into earnings. Ineffective portions of changes in fair value are recognized in earnings.

As of June 30, 2011, $275.0 million of the agreements reprice prospectively approximately every 90 days and the remaining $175.0 million of the agreements reprice prospectively approximately every 30 days. Under the terms of the interest rate swap agreements, we pay fixed rates ranging from 2.94% to 5.19%, and receive interest payments based on the three-month and one-month LIBOR. The differences to be paid or received under the interest rate swap agreements are recognized as an adjustment to interest expense.

Contingent Credit Features

Each of the above risks is managed through the execution of individual contracts with a variety of counterparties. Certain of our derivative contracts may contain credit-risk related contingent provisions that may require us to take certain actions in certain circumstances.

We have International Swap Dealers Association, or ISDA, contracts which are standardized master legal arrangements that establish key terms and conditions which govern certain derivative transactions. These ISDA contracts contain standard credit-risk related contingent provisions. Some of the provisions we are subject to are outlined below.

• If we were to have an effective event of default under our Credit Agreement that occurs and is continuing, our ISDA counterparties may have the right to request early termination and net settlement of any outstanding derivative liability positions.

• In the event that we or DCP Midstream, LLC were to be downgraded below investment grade by at least one of the major credit rating agencies, certain of our ISDA counterparties have the right to reduce our collateral threshold to zero, potentially requiring us to fully collateralize any commodity contracts in a net liability position.

• Additionally, in some cases, our ISDA contracts contain cross-default provisions that could constitute a credit-risk related contingent feature. These provisions apply if we default in making timely payments under those agreements and the amount of the default is above certain predefined thresholds, which are significantly high and are generally consistent with the terms of our Credit Agreement. As of June 30, 2011, we are not a party to any agreements that would be subject to these provisions other than our credit agreement.

Our commodity derivative contracts that are not governed by ISDA contracts do not have any credit-risk related contingent features.

Depending upon the movement of commodity prices and interest rates, each of our individual contracts with counterparties to our commodity derivative instruments or to our interest rate swap instruments are in either a net asset or net liability position. As of June 30, 2011, we had $76.1 million of individual commodity derivative contracts that contain credit-risk related contingent features that were in a net liability position, and have not posted any cash collateral relative to such positions. If a credit-risk related event were to occur and we were required to net settle our position with an individual counterparty, our ISDA contracts permit us to net all outstanding contracts with that counterparty, whether in a net asset or net liability position, as well as any cash collateral already posted. As of June 30, 2011, if a credit-risk related event were to occur we may be required to post additional collateral. Additionally, although our commodity derivative contracts that contain credit-risk related contingent features were in a net liability position as of June 30, 2011, if a credit-risk related event were to occur, the net liability position would be partially offset by contracts in a net asset position reducing our net liability to $73.5 million.

As of June 30, 2011, our interest rate swaps were in a net liability position of approximately $21.7 million, of which, the entire amount is subject to credit-risk related contingent features. If we were to have a default of any of our covenants to our Credit Agreement, that occurs and is continuing, the counterparties to our swap instruments have the right to request that we net settle the instrument in the form of cash.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Collateral

As of June 30, 2011, we had a contingent letter of credit facility for up to $10.0 million, on which we have no letters of credit issued. DCP Midstream, LLC had issued and outstanding parental guarantees totaling $95.0 million in favor of certain counterparties to our commodity derivative instruments. This contingent letter of credit facility and the parental guarantees reduce the amount of cash we may be required to post as collateral. As of June 30, 2011, we had no cash collateral posted with counterparties to our commodity derivative instruments.

Summarized Derivative Information

The following summarizes the balance within AOCI relative to our commodity and interest rate cash flow hedges:

	June 30, 2011			December 31, 2010
	(Millions)
Commodity cash flow hedges:
Net deferred losses in AOCI	$	(1.2	)	$	(0.3	)
Interest rate cash flow hedges:
Net deferred losses in AOCI		(21.3	)		(27.4	)
Total AOCI	$	(22.5	)	$	(27.7	)

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The fair value of our derivative instruments that are designated as hedging instruments, those that are marked-to-market each period, as well as the location of each within our condensed consolidated balance sheets, by major category, is summarized as follows:

		00000000		00000000	00000000		00000000			00000000
Balance Sheet Line Item	June 30, 2011		December 31, 2010		Balance Sheet Line Item	June 30, 2011			December 31, 2010
	(Millions)					(Millions)
Derivative Assets Designated as Hedging Instruments:					Derivative Liabilities Designated as Hedging Instruments:
Interest rate derivatives:					Interest rate derivatives:
Unrealized gains on derivative instruments – current	$	—	$	—	Unrealized losses on derivative instruments – current	$	(16.3	)	$	(12.2	)
Unrealized gains on derivative instruments – long term		—		—	Unrealized losses on derivative instruments – long term		(4.5	)		(5.4	)
	$	—	$	—		$	(20.8	)	$	(17.6	)
Derivative Assets Not Designated as Hedging Instruments:					Derivative Liabilities Not Designated as Hedging Instruments:
Commodity derivatives:					Commodity derivatives:
Unrealized gains on derivative instruments – current	$	1.3	$	1.9	Unrealized losses on derivative instruments – current	$	(29.8	)	$	(26.0	)
Unrealized gains on derivative instruments – long term		1.7		1.4	Unrealized losses on derivative instruments – long term		(48.1	)		(40.4	)
	$	3.0	$	3.3		$	(77.9	)	$	(66.4	)
Interest rate derivatives:					Interest rate derivatives:
Unrealized gains on derivative instruments – current	$	—	$	—	Unrealized losses on derivative instruments – current	$	(0.9	)	$	(4.8	)
Unrealized gains on derivative instruments – long term		—		—	Unrealized losses on derivative instruments – long term		—			(4.5	)
	$	—	$	—		$	(0.9	)	$	(9.3	)

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The following table summarizes the impact on our condensed consolidated balance sheets and condensed consolidated statements of operations of our derivative instruments that are accounted for using the cash flow hedge method of accounting.

	(Loss) Recognized in AOCI on Derivatives — Effective  Portion						Loss Reclassified From AOCI to Earnings — Effective Portion						Gain (Loss) Recognized in Income on Derivatives — Ineffective Portion and Amount Excluded From Effectiveness Testing
	Three Months Ended June 30,
	2011			2010			2011			2010			2011		2010
	(Millions)						(Millions)						(Millions)
Interest rate derivatives	$	(3.3	)	$	(5.8	)	$	(5.1	)	$	(5.6	) (a)	$	—	$	—	(a)(c)
Commodity derivatives	$	(0.1	)	$	—		$	—		$	—	(b)	$	—	$	—	(b)(c)

(a) Included in interest expense in our condensed consolidated statements of operations.

(b) Included in sales of natural gas, propane, NGLs and condensate in our condensed consolidated statements of operations.

(c) For the three months ended June 30, 2011 and 2010, no derivative gains or losses were reclassified from AOCI to current period earnings as a result of the discontinuance of cash flow hedges related to certain forecasted transactions that are not probable of occurring.

	(Loss) Recognized in AOCI on Derivatives — Effective  Portion						Loss Reclassified From AOCI to Earnings —Effective Portion						Gain (Loss) Recognized in Income on Derivatives — Ineffective Portion and Amount Excluded From Effectiveness Testing					Deferred Losses in AOCI Expected to be Reclassified into Earnings
	Six Months Ended June 30,																	Over the Next
	2011			2010			2011			2010			2011		2010			12 Months
	(Millions)						(Millions)						(Millions)					(Millions)
Interest rate derivatives	$	(4.2	)	$	(13.4	)	$	(10.3	)	$	(11.2	) (a)	$	—	$	—	(a)(c)	$	(19.0	)
Commodity derivatives	$	(0.1	)	$	—		$	(0.1	)	$	(0.4	) (b)	$	—	$	—	(b)(c)	$	(0.1	)

(a) Included in interest expense in our condensed consolidated statements of operations.

(b) Included in sales of natural gas, propane, NGLs and condensate in our condensed consolidated statements of operations.

(c) For the six months ended June 30, 2011 and 2010, no derivative gains or losses were reclassified from AOCI to current period earnings as a result of the discontinuance of cash flow hedges related to certain forecasted transactions that are not probable of occurring.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

Changes in value of derivative instruments, for which the hedge method of accounting has not been elected from one period to the next, are recorded in the condensed consolidated statements of operations. The following summarizes these amounts and the location within the condensed consolidated statements of operations that such amounts are reflected:

Commodity Derivatives: Statements of Operations Line Item	Three Months Ended June 30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
Third party:
Realized	$	(8.9	)	$	—		$	(14.9	)	$	(2.1	)
Unrealized		22.1			22.8			(10.8	)		30.9
Gains (losses) from commodity derivative activity, net	$	13.2		$	22.8		$	(25.7	)	$	28.8
Affiliates:
Realized	$	(0.4	)	$	0.2		$	(1.0	)	$	0.1
Unrealized		(0.2	)		(0.5	)		(0.9	)		(0.4	)
Losses from commodity derivative activity, net — affiliates	$	(0.6	)	$	(0.3	)	$	(1.9	)	$	(0.3	)
Interest Rate Derivatives: Statements of Operations Line Item	Three Months Ended June 30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
Third party:
Realized losses	$	(1.3	)	$	—		$	(2.3	)	$	—
Unrealized gains		1.2			—			2.8			—
Interest expense	$	(0.1	)	$	—		$	0.5		$	—

We do not have any derivative financial instruments that qualify as a hedge of a net investment.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The following tables represent, by commodity type, our net long or short positions that are expected to partially or entirely settle in each respective year. To the extent that we have long dated derivative positions that span multiple calendar years, the contract will appear in more than one line item in the tables below.

	June 30, 2011
	Crude Oil			Natural Gas			Natural Gas Liquids
Year of Expiration	Net Long (Short) Position (Bbls)			Net Long (Short) Position (MMBtu)			Net Long (Short) Position (Bbls)
2011		(178,281	)		(382,600	)		(633,195	)
2012		(1,021,587	)		(366,000	)		—
2013		(941,998	)		(365,000	)		—
2014		(547,500	)		(365,000	)		—
2015		(365,000	)		—			—
2016		(183,000	)		—			—

	June 30, 2010
	Crude Oil			Natural Gas			Natural Gas Liquids
Year of Expiration	Net Long (Short) Position (Bbls)			Net Long (Short) Position (MMBtu)			Net Long (Short) Position (Bbls)
2010		(490,360	)		(1,110,100	)		—
2011		(949,000	)		(985,500	)		—
2012		(777,750	)		(988,200	)		—
2013		(748,250	)		(584,000	)		—
2014		(456,250	)		—			—
2015		(182,500	)		—			—

We periodically enter into interest rate swap agreements to mitigate a portion of our floating rate interest exposure. As of June 30, 2011, we have swaps with notional values between $25.0 million and $80.0 million, which, in aggregate, exchange $450.0 million of our floating rate obligation to a fixed rate obligation through June 2012, with $150.0 million extending from June 2012 through June 2014.

11. Partnership Equity and Distributions

General — Our partnership agreement requires that, within 45 days after the end of each quarter, we distribute all of our Available Cash, as defined below, to unitholders of record on the applicable record date, as determined by our general partner.

In June 2011, we filed a shelf registration statement on Form S-3 with the SEC with a maximum aggregate offering amount of $150.0 million. The shelf registration statement will allow us to periodically register and issue partnership units which are intended to finance growth opportunities.

In March 2011, we issued 3,596,636 common limited partner units at $40.55 per unit. We received proceeds of $139.7 million, net of offering costs.

In February 2011, we issued 8,399 common limited partner units, from our long-term incentive plan, or LTIP, to employees as compensation for their service during 2010, 2009 and 2008.

In November 2010, we issued 2,875,000 common limited partner units at $34.96 per unit. We received proceeds of $96.2 million, net of offering costs.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

In September 2010, we issued 5,200 common limited partner units, from our LTIP to non-employee directors as compensation for their service during 2010.

In August 2010, we issued 2,990,000 common limited partner units at $32.57 per unit. We received proceeds of $93.1 million, net of offering costs.

On May 26, 2010, we filed a universal shelf registration statement on Form S-3 with the SEC with a maximum aggregate offering amount of $1.5 billion, to replace an existing shelf registration statement. The universal shelf registration statement will allow us to register and issue additional partnership units and debt securities.

Definition of Available Cash — Available Cash, for any quarter, consists of all cash and cash equivalents on hand at the end of that quarter:

• less the amount of cash reserves established by the general partner to:

• provide for the proper conduct of our business;

• comply with applicable law, any of our debt instruments or other agreements; and

• provide funds for distributions to the unitholders and to our general partner for any one or more of the next four quarters;

• plus, if our general partner so determines, all or a portion of cash and cash equivalents on hand on the date of determination of Available Cash for the quarter.

General Partner Interest and Incentive Distribution Rights — The general partner is entitled to a percentage of all quarterly distributions equal to its general partner interest of approximately 1% and limited partner interest of 1% as of June 30, 2011. The general partner has the right, but not the obligation, to contribute a proportionate amount of capital to us to maintain its current general partner interest.

The incentive distribution rights held by the general partner entitle it to receive an increasing share of Available Cash when pre-defined distribution targets are achieved. Currently, our distribution to our general partner related to its incentive distribution rights is at the highest level. The general partner’s incentive distribution rights were not reduced as a result of our common limited partner unit issuances, and will not be reduced if we issue additional units in the future and the general partner does not contribute a proportionate amount of capital to us to maintain its current general partner interest. Please read the Distributions of Available Cash after the Subordination Period sections below for more details about the distribution targets and their impact on the general partner’s incentive distribution rights.

Distributions of Available Cash after the Subordination Period — Our partnership agreement, after adjustment for the general partner’s relative ownership level, requires that we make distributions of Available Cash from operating surplus for any quarter after the subordination period, which ended in February 2009, in the following manner:

• first, to all unitholders and the general partner, in accordance with their pro rata interest, until each unitholder receives a total of $0.4025 per unit for that quarter;

• second, 13% to the general partner, plus the general partner’s pro rata interest, and the remainder to all unitholders pro rata until each unitholder receives a total of $0.4375 per unit for that quarter;

• third, 23% to the general partner, plus the general partner’s pro rata interest, and the remainder to all unitholders pro rata until each unitholder receives a total of $0.525 per unit for that quarter; and

• thereafter, 48% to the general partner, plus the general partner’s pro rata interest, and the remainder to all unitholders.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

The following table presents our cash distributions paid in 2011 and 2010:

Payment Date	Per Unit Distribution		Total Cash Distribution
			(Millions)
May 13, 2011	$	0.6250	$	33.4
February 14, 2011	$	0.6175	$	30.0
November 12, 2010	$	0.6100	$	27.4
August 13, 2010	$	0.6100	$	25.3
May 14, 2010	$	0.6000	$	24.6
February 12, 2010	$	0.6000	$	24.6

12. Equity-Based Compensation

On November 28, 2005, the board of directors of our General Partner adopted a long-term incentive plan, or LTIP, for employees, consultants and directors of our General Partner and its affiliates who perform services for us. The LTIP provides for the grant of limited partner units, or LPUs, phantom units, unit options and substitute awards, and, with respect to unit options and phantom units, the grant of dividend equivalent rights, or DERs. Subject to adjustment for certain events, an aggregate of 850,000 LPUs may be delivered pursuant to awards under the LTIP. Awards that are canceled or forfeited, or are withheld to satisfy the General Partner’s tax withholding obligations, are available for delivery pursuant to other awards. The LTIP is administered by the compensation committee of the General Partner’s board of directors. All awards are subject to cliff vesting, with the exception of the Phantom Units issued to directors in conjunction with our initial public offering, which are subject to graded vesting provisions.

Prior to February 18, 2011, substantially all equity-based awards were accounted for as liability awards. Effective February 18, 2011, the Modification Date, we have the intent and ability to settle certain awards within our control in units and therefore modified the accounting for these awards. We now classify them as equity awards based on their re-measured fair value. The fair value was determined based on the closing price of our common units on the Modification Date. Such modification resulted in a reclassification of $1.9 million from share-based compensation liability to additional paid-in capital on the Modification Date. Compensation expense on unvested equity awards as of the Modification Date will be recognized ratably over each remaining vesting period.

We will continue to account for other awards, which are subject to settlement in cash as liability awards. Compensation expense on these awards is recognized ratably over each vesting period, and will be re-measured each reporting period for all awards outstanding until the units are vested. The fair value of all liability awards is determined based on the closing price of our common units at each measurement date.

The reclassification of the affected awards does not impact our accounting for dividend equivalent rights as these instruments will continue to be settled in cash and therefore retain their share-based compensation liability classification.

13. Income Taxes

We are structured as a master limited partnership, which is a pass-through entity for federal income tax purposes. On December 30, 2010, we acquired all of the interests in Marysville Hydrocarbons Holdings, LLC, an entity that owns a taxable C-Corporation consolidated return group. We estimated $35.0 million of deferred tax liabilities resulting from built-in tax gains recognized in the transaction and recorded this in our preliminary purchase price allocation as of December 31, 2010.

On January 4, 2011, we merged two wholly-owned subsidiaries of Marysville Hydrocarbons Holding, LLC and converted the combined entity’s organizational structure from a corporation to a limited liability company. This conversion to a limited liability company triggered the deferred tax liabilities resulting from built-in tax gains to become currently payable. Accordingly, the estimated $35.0 million of deferred tax liabilities at December 31, 2010 became currently payable on January 4, 2011. On April 18, 2011, we made an estimated federal tax payment of $29.3 million related to our $35.0 million tax liability that resulted from our acquisition of Marysville. The remaining $5.7 million estimated tax payable is included in other current liabilities in our condensed consolidated balance sheet as of June 30, 2011.

14. Net Income or Loss per Limited Partner Unit

Basic net income per limited partner unit is computed based on the weighted average number of units outstanding during the period. Diluted net income per limited partner unit is computed based on the weighted average number of units plus the effect of dilutive potential units outstanding during the period using the two-class method. Dilutive potential units include outstanding performance units, phantom units and restricted units. The dilutive effect of unit-based awards was 75,560 equivalent units and 55,105 equivalent units during the three and six month periods ended June 30, 2011, respectively. There were no dilutive unit-based awards in the three and six month periods ended June 30, 2010.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

15. Commitments and Contingent Liabilities

Litigation — We are a party to various legal proceedings, as well as administrative and regulatory proceedings and commercial disputes that have arisen in the ordinary course of our business. Management currently believes that the ultimate resolution of these matters, taken as a whole, and after consideration of amounts accrued, insurance coverage or other indemnification arrangements, will not have a material adverse effect on our condensed consolidated results of operations, financial position, or cash flows.

Insurance — We renewed our insurance policies in May, June and July 2011 for the 2011-2012 insurance year. We contract with third party and affiliate insurers for: (1) automobile liability insurance for all owned, non-owned and hired vehicles; (2) general liability insurance; (3) excess liability insurance above the established primary limits for general liability and automobile liability insurance; and (4) property insurance, which covers replacement value of real and personal property and includes business interruption/extra expense. These renewals have not resulted in any material change to the premiums we are contracted to pay in the 2011-2012 insurance year compared with the 2010-2011 insurance year. We are jointly insured with DCP Midstream, LLC for directors and officers insurance covering our directors and officers for acts related to our business activities. All coverage is subject to certain limits and deductibles, the terms and conditions of which are common for companies that are of similar size to us and with similar types of operations.

Our insurance on Discovery for the 2011-2012 insurance year includes general and excess liability onshore property damage, including named windstorm and business interruption, and offshore non-wind property and business interruption insurance. The availability of offshore named windstorm property and business interruption insurance has been significantly reduced over the past few years as a result of higher industry-wide damage claims. Additionally, the named windstorm property and business interruption insurance that is available comes at uneconomic premium levels, higher deductibles and lower coverage limits. As such, Discovery has elected to not purchase offshore named windstorm property and business interruption insurance coverage for the 2011-2012 insurance year.

Environmental — During the first quarter of 2011, we discovered excess emissions at our East Texas gas plant. We met with the Texas Commission on Environmental Quality, or TCEQ, in April 2011 to discuss this matter which was included in Title V reports to the State. The TCEQ has requested detailed follow-up from us and an action plan to address this matter. At this time formal enforcement has not been initiated, although it is not possible to predict what action the TCEQ may take or the cost to address this matter. We do not believe the ultimate resolution of this matter will have a material adverse effect on our consolidated results of operations, financial position or cash flows.

Indemnification — DCP Midstream, LLC has indemnified us for certain potential environmental claims, losses and expenses associated with the operation of the assets of certain of our predecessors.

16. Business Segments

Our operations are located in the United States and are organized into three reporting segments: (1) Natural Gas Services; (2) Wholesale Propane Logistics; and (3) NGL Logistics.

Natural Gas Services — Our Natural Gas Services segment provides services that include gathering, compressing, treating, processing, fractionating, transporting and storing natural gas. The segment consists of our Northern Louisiana system, our Southern Oklahoma system, our Wyoming system, our Michigan system, our 33.33% interest in the Southeast Texas system, our 50.1% interest in the East Texas system, our 75% interest in the Colorado system, and our 40% limited liability company interest in Discovery.

Wholesale Propane Logistics — Our Wholesale Propane Logistics segment provides services that include the receipt of propane by pipeline, rail or ship to our terminals that deliver the product to retail distributors. The segment consists of six owned rail terminals, one owned marine import terminal, one leased marine terminal, one pipeline terminal and access to several open-access pipeline terminals.

NGL Logistics — Our NGL Logistics segment provides services that include transportation, storage and fractionation of NGLs. The segment consists of the Seabreeze and Wilbreeze intrastate NGL pipelines, the Wattenberg and Black Lake interstate NGL pipelines, the NGL storage facility in Michigan and the DJ Basin NGL Fractionators in Colorado.

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DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

These segments are monitored separately by management for performance against our internal forecast and are consistent with internal financial reporting. These segments have been identified based on the differing products and services, regulatory environment and the expertise required for these operations. Gross margin is a performance measure utilized by management to monitor the business of each segment.

The following tables set forth our segment information:

	Three Months Ended June 30, 2011
	Natural  Gas Services			Wholesale Propane Logistics			NGL Logistics			Other			Eliminations (f)		Total
	(Millions)
Total operating revenue	$	257.4		$	104.2		$	12.6		$	—		$	—	$	374.2
Total purchases		(176.3	)		(98.0	)		—			—			—		(274.3	)
Gross margin (a)	$	81.1		$	6.2		$	12.6		$	—		$	—	$	99.9
Operating and maintenance expense		(15.7	)		(4.2	)		(1.8	)		—			—		(21.7	)
Depreciation and amortization expense		(17.4	)		(0.7	)		(2.0	)		—			—		(20.1	)
General and administrative expense		—			—			—			(8.6	)		—		(8.6	)
Other income		—			—			0.1			—			—		0.1
Earnings from unconsolidated affiliates		10.0			—			—			—			—		10.0
Interest expense		—			—			—			(8.4	)		—		(8.4	)
Income tax expense (b)		—			—			—			—			—		—
Net income (loss)		58.0			1.3			8.9			(17.0	)		—		51.2
Net income attributable to noncontrolling interests		(9.7	)		—			—			—			—		(9.7	)
Net income (loss) attributable to partners	$	48.3		$	1.3		$	8.9		$	(17.0	)	$	—	$	41.5
Non-cash derivative mark-to-market (c)	$	22.3		$	(0.5	)	$	—		$	(0.8	)	$	—	$	21.0
Capital expenditures	$	12.6		$	0.9		$	2.0		$	—		$	—	$	15.5

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(Unaudited)

	Three Months Ended June 30, 2010
	Natural Gas Services (e)			Wholesale Propane Logistics			NGL Logistics			Other			Total
	(Millions)
Total operating revenue	$	211.7		$	62.2		$	3.6		$	—		$	277.5
Total purchases		(141.5	)		(63.1	)		(1.1	)		—			(205.7	)
Gross margin (a)	$	70.2		$	(0.9	)	$	2.5		$	—		$	71.8
Operating and maintenance expense		(17.0	)		(2.6	)		(1.0	)		—			(20.6	)
Depreciation and amortization expense		(17.8	)		(0.3	)		(0.6	)		—			(18.7	)
General and administrative expense		—			—			—			(8.2	)		(8.2	)
Other income		0.5			3.0			—			—			3.5
Earnings from unconsolidated affiliates		6.1			—			0.3			—			6.4
Interest expense		—			—			—			(7.3	)		(7.3	)
Income tax expense (b)		—			—			—			(0.1	)		(0.1	)
Net income (loss)		42.0			(0.8	)		1.2			(15.6	)		26.8
Net income attributable to noncontrolling interests		(1.0	)		—			—			—			(1.0	)
Net income (loss) attributable to partners	$	41.0		$	(0.8	)	$	1.2		$	(15.6	)	$	25.8
Non-cash derivative mark-to-market (c)	$	22.3		$	—		$	—		$	0.2		$	22.5
Capital expenditures	$	11.2		$	—		$	2.0		$	—		$	13.2

	Six Months Ended June 30, 2011
	Natural  Gas Services			Wholesale Propane Logistics			NGL Logistics			Other			Eliminations (f)			Total
	(Millions)
Total operating revenue	$	421.9		$	352.0		$	27.6		$	—		$	(2.2	)	$	799.3
Total purchases		(322.8	)		(324.0	)		(4.7	)		—			2.2			(649.3	)
Gross margin (a)	$	99.1		$	28.0		$	22.9		$	—		$	—		$	150.0
Operating and maintenance expense		(32.2	)		(7.8	)		(5.8	)		—			—			(45.8	)
Depreciation and amortization expense		(34.9	)		(1.4	)		(3.7	)		—			—			(40.0	)
General and administrative expense		—			—			—			(17.6	)		—			(17.6	)
Other income		—			—			0.2			—			—			0.2
Earnings from unconsolidated affiliates		18.6			—			—			—			—			18.6
Interest expense		—			—			—			(16.4	)		—			(16.4	)
Income tax expense (b)		—			—			—			(0.2	)		—			(0.2	)
Net income (loss)		50.6			18.8			13.6			(34.2	)		—			48.8
Net income attributable to noncontrolling interests		(13.2	)		—			—			—			—			(13.2	)
Net income (loss) attributable to partners	$	37.4		$	18.8		$	13.6		$	(34.2	)	$	—		$	35.6
Non-cash derivative mark-to-market (c)	$	(11.1	)	$	(0.8	)	$	—		$	(1.0	)	$	—		$	(12.9	)
Capital expenditures	$	21.4		$	1.5		$	6.3		$	—		$	—		$	29.2
Acquisition expenditures	$	121.8		$	—		$	29.6		$	—		$	—		$	151.4

36

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Six Months Ended June 30, 2010
	Natural Gas Services (e)			Wholesale Propane Logistics			NGL Logistics			Other			Total
	(Millions)
Total operating revenue	$	429.8		$	243.0		$	8.4		$	—		$	681.2
Total purchases		(305.8	)		(230.2	)		(2.5	)		—			(538.5	)
Gross margin (a)	$	124.0		$	12.8		$	5.9		$	—		$	142.7
Operating and maintenance expense		(33.2	)		(5.2	)		(1.2	)		—			(39.6	)
Depreciation and amortization expense		(34.8	)		(0.6	)		(1.1	)		—			(36.5	)
General and administrative expense		—			—			—			(16.8	)		(16.8	)
Other income		0.5			3.0			—			—			3.5
Earnings from unconsolidated affiliates		20.0			—			0.8			—			20.8
Interest expense		—			—			—			(14.5	)		(14.5	)
Income tax expense (b)		—			—			—			(0.4	)		(0.4	)
Net income (loss)		76.5			10.0			4.4			(31.7	)		59.2
Net income attributable to noncontrolling interests		(1.1	)		—			—			—			(1.1	)
Net income (loss) attributable to partners	$	75.4		$	10.0		$	4.4		$	(31.7	)	$	58.1
Non-cash derivative mark-to-market (c)	$	30.7		$	(0.6	)	$	—		$	0.2		$	30.3
Capital expenditures	$	23.3		$	—		$	2.1		$	—		$	25.4
Acquisitions, net of cash acquired	$	—		$	—		$	22.0		$	—		$	22.0
Investments in unconsolidated affiliates	$	0.7		$	—		$	—		$	—		$	0.7

	June 30, 2011		December 31, 2010
	(Millions)
Segment long-term assets:
Natural Gas Services (e)	$	1,247.2	$	1,253.7
Wholesale Propane Logistics		102.3		101.7
NGL Logistics		252.5		221.7
Other (d)		4.7		4.1
Total long-term assets		1,606.7		1,581.2
Current assets		188.3		232.0
Total assets	$	1,795.0	$	1,813.2

37

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

(a) Gross margin consists of total operating revenues, including commodity derivative activity, less purchases of natural gas, propane, NGLs and condensate. Gross margin is viewed as a non-GAAP measure under the rules of the SEC, but is included as a supplemental disclosure because it is a primary performance measure used by management as it represents the results of product sales versus product purchases. As an indicator of our operating performance, gross margin should not be considered an alternative to, or more meaningful than, net income or cash flow as determined in accordance with GAAP. Our gross margin may not be comparable to a similarly titled measure of another company because other entities may not calculate gross margin in the same manner.

(b) Income tax expense relates primarily to the Texas margin tax and the Michigan business tax.

(c) Non-cash derivative mark-to-market is included in segment gross margin, along with cash settlements for our derivative contracts.

(d) Other long-term assets not allocable to segments consist of unrealized gains on derivative instruments, corporate leasehold improvements and other long-term assets.

(e) The segment information for the three and six months ended June 30, 2010 and as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

(f) Represents intersegment revenues consisting of sales of NGLs by Marysville in our NGL Logistics business to our Wholesale Propane business.

17. Supplemental Cash Flow Information

	Six Months Ended June 30,
	2011		2010
	(Millions)
Cash paid for interest:
Cash paid for interest, net of amounts capitalized	$	2.2	$	3.2
Cash paid for income taxes, net of income tax refunds	$	29.9	$	0.5
Non-cash investing and financing activities:
Property, plant and equipment acquired with accounts payable	$	3.0	$	3.2
Other non-cash additions of property, plant and equipment	$	0.1	$	0.2
Acquisition related contingent consideration	$	—	$	1.0
Non-cash change in parent advances	$	1.7	$	—
Non-cash distributions to DCP Midstream, LLC	$	2.6	$	—

38

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

18. Supplementary Information — Condensed Consolidating Financial Information

The following condensed consolidating financial information presents the results of operations, financial position and cash flows of DCP Midstream Partners, LP, or parent guarantor, DCP Midstream Operating LP, or subsidiary issuer, which is a 100% owned subsidiary, and non-guarantor subsidiaries, as well as the consolidating adjustments necessary to present DCP Midstream Partners, LP’s results on a consolidated basis. In conjunction with the universal shelf registration statement on Form S-3 filed with the SEC on May 26, 2010, the parent guarantor has agreed to fully and unconditionally guarantee securities of the subsidiary issuer. For the purpose of the following financial information, investments in subsidiaries are reflected in accordance with the equity method of accounting. The financial information may not necessarily be indicative of results of operations, cash flows, or financial position had the subsidiaries operated as independent entities.

	Condensed Consolidating Balance Sheets June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	1.5		$	1.9		$	(1.0	)	$	2.4
Accounts receivable		—		—			140.6			—			140.6
Inventories		—		—			42.4			—			42.4
Other		—		0.2			2.7			—			2.9
Total current assets		—		1.7			187.6			(1.0	)		188.3
Property, plant and equipment, net		—		—			1,115.3			—			1,115.3
Goodwill and intangible assets, net		—		—			263.9			—			263.9
Advances receivable — consolidated subsidiaries		409.3		582.7			—			(992.0	)		—
Investments in consolidated subsidiaries		190.8		339.7			—			(530.5	)		—
Investments in unconsolidated affiliates		—		—			218.5			—			218.5
Other long-term assets		—		1.8			7.2			—			9.0
Total assets	$	600.1	$	925.9		$	1,792.5		$	(1,523.5	)	$	1,795.0
LIABILITIES AND EQUITY
Accounts payable and other current liabilities	$	—	$	480.8		$	173.8		$	(1.0	)	$	653.6
Advances payable — consolidated subsidiaries		—		—			992.0			(992.0	)		—
Long-term debt		—		249.8			—			—			249.8
Other long-term liabilities		—		4.5			63.9			—			68.4
Total liabilities		—		735.1			1,229.7			(993.0	)		971.8
Commitments and contingent liabilities
Equity:
Partners’ equity
Net equity		600.1		212.1			340.9			(530.5	)		622.6
Accumulated other comprehensive loss		—		(21.3	)		(1.2	)		—			(22.5	)
Total partners’ equity		600.1		190.8			339.7			(530.5	)		600.1
Noncontrolling interests		—		—			223.1			—			223.1
Total equity		600.1		190.8			562.8			(530.5	)		823.2
Total liabilities and equity	$	600.1	$	925.9		$	1,792.5		$	(1,523.5	)	$	1,795.0

39

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Condensed Consolidating Balance Sheets December 31, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	1.5		$	6.7		$	(1.5	)	$	6.7
Accounts receivable		—		—			151.0			—			151.0
Inventories		—		—			64.1			—			64.1
Other		—		—			10.2			—			10.2
Total current assets		—		1.5			232.0			(1.5	)		232.0
Property, plant and equipment, net		—		—			1,097.1			—			1,097.1
Goodwill and intangible assets, net		—		—			258.6			—			258.6
Advances receivable — consolidated subsidiaries		333.4		534.7			—			(868.1	)		—
Investments in consolidated subsidiaries		297.5		436.2			—			(733.7	)		—
Investments in unconsolidated affiliates		—		—			216.9			—			216.9
Other long-term assets		—		2.3			6.3			—			8.6
Total assets	$	630.9	$	974.7		$	1,810.9		$	(1,603.3	)	$	1,813.2
LIABILITIES AND EQUITY
Accounts payable and other current liabilities	$	0.2	$	19.5		$	193.0		$	(1.5	)	$	211.2
Advances payable — consolidated subsidiaries		—		—			868.1			(868.1	)		—
Long-term debt		—		647.8			—			—			647.8
Other long-term liabilities		—		9.9			93.5			—			103.4
Total liabilities		0.2		677.2			1,154.6			(869.6	)		962.4
Commitments and contingent liabilities
Equity:
Partners’ equity
Predecessor equity		—		—			112.6			—			112.6
Net equity		630.7		324.9			323.9			(733.7	)		545.8
Accumulated other comprehensive loss		—		(27.4	)		(0.3	)		—			(27.7	)
Total partners’ equity		630.7		297.5			436.2			(733.7	)		630.7
Noncontrolling interests		—		—			220.1			—			220.1
Total equity		630.7		297.5			656.3			(733.7	)		850.8
Total liabilities and equity	$	630.9	$	974.7		$	1,810.9		$	(1,603.3	)	$	1,813.2

(a) The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

40

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Condensed Consolidating Statements of Operations Three Months Ended June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	323.1		$	—		$	323.1
Transportation, processing and other		—		—			38.5			—			38.5
Gains from commodity derivative activity, net		—		—			12.6			—			12.6
Total operating revenues		—		—			374.2			—			374.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			274.3			—			274.3
Operating and maintenance expense		—		—			21.7			—			21.7
Depreciation and amortization expense		—		—			20.1			—			20.1
General and administrative expense		—		—			8.6			—			8.6
Other income		—		—			(0.1	)		—			(0.1	)
Total operating costs and expenses		—		—			324.6			—			324.6
Operating income (loss)		—		—			49.6			—			49.6
Interest expense, net		—		(8.4	)		—			—			(8.4	)
Income from consolidated subsidiaries		41.5		49.9			—			(91.4	)		—
Earnings from unconsolidated affiliates		—		—			10.0			—			10.0
Income before income taxes		41.5		41.5			59.6			(91.4	)		51.2
Income tax expense		—		—			—			—			—
Net income (loss)		41.5		41.5			59.6			(91.4	)		51.2
Net income attributable to noncontrolling interests		—		—			(9.7	)		—			(9.7	)
Net income (loss) attributable to partners	$	41.5	$	41.5		$	49.9		$	(91.4	)	$	41.5

41

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Condensed Consolidating Statements of Operations Three Months Ended June 30, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	228.0		$	—		$	228.0
Transportation, processing and other		—		—			27.0			—			27.0
Gains from commodity derivative activity, net		—		—			22.5			—			22.5
Total operating revenues		—		—			277.5			—			277.5
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			205.7			—			205.7
Operating and maintenance expense		—		—			20.6			—			20.6
Depreciation and amortization expense		—		—			18.7			—			18.7
General and administrative expense		—		—			8.2			—			8.2
Other income		—		—			(0.5	)		—			(0.5	)
Other income — affiliates		—		—			(3.0	)		—			(3.0	)
Total operating costs and expenses		—		—			249.7			—			249.7
Operating income		—		—			27.8			—			27.8
Interest expense, net		—		(7.3	)		—			—			(7.3	)
Earnings from consolidated subsidiaries		25.8		33.1			—			(58.9	)		—
Earnings from unconsolidated affiliates		—		—			6.4			—			6.4
Income before income taxes		25.8		25.8			34.2			(58.9	)		26.9
Income tax expense		—		—			(0.1	)		—			(0.1	)
Net income (loss)		25.8		25.8			34.1			(58.9	)		26.8
Net income attributable to noncontrolling interests		—		—			(1.0	)		—			(1.0	)
Net income (loss) attributable to partners	$	25.8	$	25.8		$	33.1		$	(58.9	)	$	25.8

(a) The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

42

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Condensed Consolidating Statements of Operations Six Months Ended June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	752.8		$	—		$	752.8
Transportation, processing and other		—		—			74.1			—			74.1
Losses from commodity derivative activity, net		—		—			(27.6	)		—			(27.6	)
Total operating revenues		—		—			799.3			—			799.3
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			649.3			—			649.3
Operating and maintenance expense		—		—			45.8			—			45.8
Depreciation and amortization expense		—		—			40.0			—			40.0
General and administrative expense		—		—			17.6			—			17.6
Other income		—		—			(0.2	)		—			(0.2	)
Total operating costs and expenses		—		—			752.5			—			752.5
Operating income		—		—			46.8			—			46.8
Interest expense, net		—		(16.4	)		—			—			(16.4	)
Earnings from consolidated subsidiaries		35.6		52.0			—			(87.6	)		—
Earnings from unconsolidated affiliates		—		—			18.6			—			18.6
Income before income taxes		35.6		35.6			65.4			(87.6	)		49.0
Income tax expense		—		—			(0.2	)		—			(0.2	)
Net income (loss)		35.6		35.6			65.2			(87.6	)		48.8
Net income attributable to noncontrolling interests		—		—			(13.2	)		—			(13.2	)
Net income (loss) attributable to partners	$	35.6	$	35.6		$	52.0		$	(87.6	)	$	35.6

43

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Condensed Consolidating Statements of Operations Six Months Ended June 30, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	598.4		$	—		$	598.4
Transportation, processing and other		—		—			54.3			—			54.3
Gains from commodity derivative activity, net		—		—			28.5			—			28.5
Total operating revenues		—		—			681.2			—			681.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			538.5			—			538.5
Operating and maintenance expense		—		—			39.6			—			39.6
Depreciation and amortization expense		—		—			36.5			—			36.5
General and administrative expense		—		—			16.8			—			16.8
Other income		—		—			(0.5	)		—			(0.5	)
Other income — affiliates		—		—			(3.0	)		—			(3.0	)
Total operating costs and expenses		—		—			627.9			—			627.9
Operating income		—		—			53.3			—			53.3
Interest expense, net		—		(14.4	)		(0.1	)		—			(14.5	)
Earnings from consolidated subsidiaries		58.1		72.5			—			(130.6	)		—
Earnings from unconsolidated affiliates		—		—			20.8			—			20.8
Income before income taxes		58.1		58.1			74.0			(130.6	)		59.6
Income tax expense		—		—			(0.4	)		—			(0.4	)
Net income (loss)		58.1		58.1			73.6			(130.6	)		59.2
Net income attributable to noncontrolling interests		—		—			(1.1	)		—			(1.1	)
Net income (loss) attributable to partners	$	58.1	$	58.1		$	72.5		$	(130.6	)	$	58.1

(a) The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

44

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2011
	Parent Guarantor			Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(76.0	)	$	(62.9	)	$	227.0		$	0.5		$	88.6
INVESTING ACTIVITIES:
Capital expenditures		—			—			(29.2	)		—			(29.2	)
Acquisitions, net of cash acquired		—			—			(151.4	)		—			(151.4	)
Investments in unconsolidated affiliates		—			—			(7.1	)		—			(7.1	)
Return of investment from unconsolidated affiliate		—			—			1.6			—			1.6
Proceeds from sale of assets		—			—			0.2			—			0.2
Net cash used in investing activities		—			—			(185.9	)		—			(185.9	)
FINANCING ACTIVITIES:
Proceeds from debt		—			716.0			—			—			716.0
Payments of debt		—			(653.0	)		—			—			(653.0	)
Payment of deferred financing costs		—			(0.1	)		—			—			(0.1	)
Proceeds from issuance of common units, net of offering costs		139.4			—			—			—			139.4
Excess purchase price over acquired assets		—			—			(35.7	)		—			(35.7	)
Distributions to unitholders and general partner		(63.4	)		—			—			—			(63.4	)
Distributions to noncontrolling interests		—			—			(15.8	)		—			(15.8	)
Contributions from noncontrolling interests		—			—			5.6			—			5.6
Net cash provided by (used in) financing activities		76.0			62.9			(45.9	)		—			93.0
Net change in cash and cash equivalents		—			—			(4.8	)		0.5			(4.3	)
Cash and cash equivalents, beginning of period		—			1.5			6.7			(1.5	)		6.7
Cash and cash equivalents, end of period	$	—		$	1.5		$	1.9		$	(1.0	)	$	2.4

45

DCP MIDSTREAM PARTNERS, LP

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

(Unaudited)

	Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2010 (a)
	Parent Guarantor			Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	$	49.1		$	(12.0	)	$	53.5		$	(0.9	)	$	89.7
INVESTING ACTIVITIES:
Capital expenditures		—			—			(25.4	)		—			(25.4	)
Acquisitions, net of cash acquired		—			—			(22.0	)		—			(22.0	)
Investments in unconsolidated affiliates		—			—			(27.0	)		—			(27.0	)
Proceeds from sale of assets		—			—			1.7			—			1.7
Proceeds from sales of available-for-sale securities		—			10.1			—			—			10.1
Net cash provided by (used in) investing activities		—			10.1			(72.7	)		—			(62.6	)
FINANCING ACTIVITIES:
Proceeds from debt		—			210.6			—			—			210.6
Payments of debt		—			(208.6	)		—			—			(208.6	)
Distributions to unitholders and general partner		(49.1	)		—			—			—			(49.1	)
Distributions to noncontrolling interests		—			—			(8.2	)		—			(8.2	)
Contributions from noncontrolling interests		—			—			9.1			—			9.1
Net change in advances to predecessor from DCP Midstream LLC		—			—			25.3			—			25.3
Purchase of additional interest in a subsidiary		—			—			(3.5	)		—			(3.5	)
Net cash provided by (used in) financing activities		(49.1	)		2.0			22.7			—			(24.4	)
Net change in cash and cash equivalents		—			0.1			3.5			(0.9	)		2.7
Cash and cash equivalents, beginning of period		—			1.6			1.3			(0.8	)		2.1
Cash and cash equivalents, end of period	$	—		$	1.7		$	4.8		$	(1.7	)	$	4.8

(a) The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

19. Subsequent Events

On July 26, 2011, the board of directors of the General Partner declared a quarterly distribution of $0.6325 per unit, payable on August 12, 2011 to unitholders of record on August 5, 2011.

On August 1, 2011, we reached an agreement with DCP Midstream, LLC for us to construct a 200 MMcf/d cryogenic natural gas processing plant in the Eagle Ford shale or, the Eagle Plant, which represents an approximate $120 million investment. In support of our construction of the Eagle Plant, we entered into a 15 year fee-based processing agreement with an affiliate of DCP Midstream, LLC, which provides us with a fixed demand charge for 150 MMcf/d along with a throughput fee on all volumes processed. The processing agreement commences with commercial operations of the new plant, which is expected to be online by the fourth quarter of 2012. In conjunction with the agreement, we also entered into a purchase and sale agreement with DCP Midstream, LLC to purchase certain tangible assets and land located in the Eagle Ford Shale for approximately $25.0 million.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion analyzes our financial condition and results of operations. You should read the following discussion of our financial condition and results of operations in conjunction with our condensed consolidated financial statements and notes included elsewhere in this Form 10-Q and the consolidated financial statements and notes thereto included in our 2010 Form 10-K.

Overview

We are a Delaware limited partnership formed by DCP Midstream, LLC to own, operate, acquire and develop a diversified portfolio of complementary midstream energy assets. Our operations are organized into three business segments: Natural Gas Services, Wholesale Propane Logistics and NGL Logistics.

Transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method. Accordingly, our condensed consolidated financial statements have been adjusted to include the historical results of our 33.33% interest in Southeast Texas for all periods presented. We refer to our 33.33% interest in Southeast Texas, prior to our acquisition from DCP Midstream, LLC in January 2011, as our “predecessor.” We recognize transfers of net assets between entities under common control at DCP Midstream, LLC’s basis in the net assets contributed. The amount of the purchase price in excess of DCP Midstream, LLC’s basis in the net assets is recognized as a reduction to partners’ equity. The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC’s respective ownership interests in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

Crude oil and NGL prices have remained at favorable levels, although natural gas prices have remained relatively low. Overall drilling and rig counts continue to improve. Natural gas drilling activity levels vary by geographic area, but in general, drilling remains robust in areas with liquids rich gas. In certain of our areas, drilling remains depressed. In addition, advances in technology, such as horizontal drilling and fractionation in shale plays, have led to certain geographic areas becoming increasingly accessible. Gas prices currently remain modest due to increased supply relative to demand. Our long-term view is that commodity prices will be at levels that we believe will support sustained or increasing levels of natural gas drilling.

On January 1, 2011, we acquired a 33.33% interest in Southeast Texas from DCP Midstream, LLC for $150.0 million, in a transaction among entities under common control. The Southeast Texas system is a fully integrated midstream business which includes 675 miles of natural gas pipelines, three natural gas processing plants totaling 380 MMcf/d of processing capacity, natural gas storage assets with 9 Bcf of existing storage capacity, and NGL market deliveries direct to Exxon Mobil and to Mont Belvieu via our Black Lake NGL pipeline.

On March 24, 2011, we acquired two NGL fractionation facilities, or DJ Basin NGL Fractionators, for $30.0 million. The DJ Basin NGL Fractionators which provide fee-based margins under a long-term contract, are co-located with and operated by DCP Midstream, LLC.

On August 1, 2011, we reached an agreement with DCP Midstream, LLC for us to construct a 200 MMcf/d cryogenic natural gas processing plant in the Eagle Ford shale or, the Eagle Plant. The Eagle Plant, which represents an approximate $120 million investment, will enhance DCP Midstream, LLC’s existing South Texas super system comprised of 5 natural gas processing plants totaling approximately 800 MMcf/d of capacity. The Eagle Plant will be the enterprise’s most efficient plant in the Eagle Ford shale. DCP Midstream, LLC will provide upstream and downstream interconnects to the plan. In support of our construction of the Eagle Plant, we entered into a 15 year fee-based processing agreement with an affiliate of DCP Midstream LLC, which provides us with a fixed demand charge for 150 MMcf/d along with a throughput fee on all volumes processed. The processing agreement commences with commercial operations of the new plant, which is expected to be online by the fourth quarter of 2012. In conjunction with the agreement, we also entered into a purchase and sale agreement with DCP Midstream, LLC to purchase certain tangible assets and land located in the Eagle Ford Shale for approximately $25.0 million.

Through the growth opportunities executed, we increased our business diversity, geographic and resource exposure, and our fee-based margins. Our integration efforts related to our acquisitions are progressing according to plan. The Wattenberg capital expansion project was completed during the second quarter. We raised $139.7 million in capital through a public equity offering in March used to finance a portion of our growth opportunities.

Financial results for the first half of the year were in line with our previously provided 2011 forecast. We raised our distributions for the first and second quarters, resulting in a 3.7% increase in our quarterly distribution rate over the rate declared in the second quarter of 2010. The distributions reflect our business results as well as our recent execution on growth opportunities.

47

General Trends and Outlook

In 2011, our strategic objectives will continue to focus on maintaining stable distributable cash flows from our existing assets and executing on growth opportunities to increase our long-term distributable cash flows. We believe the key elements to stable distributable cash flows are the diversity of our asset portfolio, our significant fee-based business representing approximately 60% of our estimated margins, and our highly hedged commodity position, the objective of which is to protect against downside risk in our distributable cash flows.

We incur capital expenditures for our consolidated entities and our unconsolidated affiliates. We anticipate maintenance capital expenditures of between $10.0 million and $15.0 million, and expenditures for expansion capital of between $35.0 million and $50.0 million in 2011, including $10.0 million for the expansion of storage capacity at our Southeast Texas system. Additionally, Southeast Texas expects to incur capital expenditures for expansion of the Raywood plant, acquired in June 2010, that is currently underway. The board of directors may approve additional growth capital during the year, at its discretion. This capital does not include any acquisitions or additional investment opportunities that may be identified throughout the course of the year and approved by our management and our board of directors.

Through the remainder of 2011, we expect to continue to pursue a multi-faceted growth strategy, which may include executing on organic opportunities around our footprint, third party acquisitions, and investment opportunities with our general partner in order to grow our distributable cash flows.

For an in-depth discussion of factors that may significantly affect our results, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations — Factors That May Significantly Affect Our Results” in our 2010 Form 10-K.

Recent Events

In June 2011, we filed a shelf registration statement on Form S-3 with the SEC with a maximum aggregate offering amount of $150.0 million. The shelf registration statement will allow us to periodically register and issue partnership units which are intended to finance growth opportunities.

On July 26, 2011, the board of directors of the General Partner declared a quarterly distribution of $0.6325 per unit, payable on August 12, 2011 to unitholders of record on August 5, 2011.

Reconciliation of Non-GAAP Measures

Gross Margin, Segment Gross Margin and Adjusted Segment Gross Margin — We view our gross margin as an important performance measure of the core profitability of our operations. We review our gross margin monthly for consistency and trend analysis.

We define gross margin as total operating revenues, including commodity derivative activity, less purchases of natural gas, propane and NGLs, and we define segment gross margin for each segment as total operating revenues for that segment less commodity purchases for that segment. Our gross margin equals the sum of our segment gross margins. We define adjusted segment gross margin as segment gross margin plus non-cash commodity derivative losses, less non-cash commodity derivative gains for that segment. Gross margin, segment gross margin and adjusted segment gross margin are primary performance measures used by management, as these measures represent the results of product sales and purchases, a key component of our operations. As an indicator of our operating performance, gross margin, segment gross margin and adjusted segment gross margin should not be considered an alternative to, or more meaningful than, net income or loss, net income or loss attributable to partners, operating income, cash flows from operating activities or any other measure of financial performance presented in accordance with GAAP.

Operating and Maintenance and General and Administrative Expense — Operating and maintenance expenses are costs associated with the operation of a specific asset and are primarily comprised of direct labor, ad valorem taxes, repairs and maintenance, lease expenses, utilities and contract services. We have entered into an omnibus agreement, as amended, or the Omnibus Agreement, with DCP Midstream, LLC. Under the Omnibus Agreement, we are required to reimburse DCP Midstream, LLC for salaries of operating personnel and employee benefits, as well as capital expenditures, maintenance and repair costs, taxes and other direct costs incurred by DCP Midstream, LLC on our behalf. We also pay DCP Midstream, LLC an annual fee under the Omnibus Agreement for centralized corporate functions performed by DCP Midstream, LLC on our behalf, including legal, accounting, cash management, insurance administration and claims processing, risk management, health, safety and environmental, information technology, human resources, credit, payroll, taxes and engineering. On January 1, 2011, we extended the omnibus agreement through December 31, 2011 for $10.2 million.

48

Adjusted EBITDA — We define adjusted EBITDA as net income or loss attributable to partners less interest income, noncontrolling interest in depreciation and income tax expense and non-cash commodity derivative gains, plus interest expense, income tax expense, depreciation and amortization expense and non-cash commodity derivative losses. Adjusted EBITDA is used as a supplemental liquidity and performance measure by our management and by external users of our financial statements, such as investors, commercial banks, research analysts and others, to assess:

• the ability of our assets to generate cash sufficient to pay interest costs, support our indebtedness, make cash distributions to our unitholders and general partner, and finance maintenance capital expenditures;

• financial performance of our assets without regard to financing methods, capital structure or historical cost basis;

• our operating performance and return on capital as compared to those of other companies in the midstream energy industry, without regard to financing methods or capital structure; and

• the viability of acquisitions and capital expenditure projects and the overall rates of return on investment opportunities.

Our adjusted EBITDA may not be comparable to a similarly titled measure of another company because other entities may not calculate this measure in the same manner.

Adjusted EBITDA should not be considered an alternative to, or more meaningful than, net income or loss, net income or loss attributable to partners, operating income, cash flows from operating activities or any other measure of financial performance presented in accordance with GAAP as measures of operating performance, liquidity or ability to service debt obligations.

Adjusted Segment EBITDA — We define adjusted segment EBITDA for each segment as segment net income or loss attributable to Partners less non-cash commodity derivative gains for that segment, plus depreciation and amortization expense and non-cash commodity derivative losses for that segment, adjusted for any noncontrolling interest on depreciation and amortization expense, and income tax expense for that segment. We use adjusted segment EBITDA, which is a financial measure not defined in the United States generally accepted account principles (GAAP). Adjusted segment EBITDA is used as a supplemental performance measure by our management and we believe by external users of our financial statements, such as investors, commercial banks, research analysts and others, to assess:

• financial performance of our assets without regard to financing methods, capital structure or historical cost basis;

• our operating performance and return on capital as compared to those of other companies in the midstream energy industry, without regard to financing methods or capital structure; and

• viability and performance of acquisitions and capital expenditure projects and the overall rates of return on investment opportunities.

The accompanying schedules provide reconciliations of this non-GAAP financial measure to its most directly comparable GAAP financial measure. Adjusted segment EBITDA should not be considered in isolation or as an alternative to our financial measures presented in accordance with GAAP, including net income or loss attributable to Partners, or any other measure of performance presented in accordance with GAAP. Adjusted segment EBITDA as presented by us may not be comparable to similarly titled measures of other companies because they may not calculate adjusted segment EBITDA in the same manner.

Distributable Cash Flow — We define Distributable Cash Flow as net cash provided by or used in operating activities, less maintenance capital expenditures, net of reimbursable projects, plus or minus adjustments for non-cash mark-to-market of derivative instruments, proceeds from divestiture of assets, net income attributable to noncontrolling interest net of depreciation and income tax, net changes in operating assets and liabilities, and other adjustments to reconcile net cash provided by or used in operating activities (see “— Liquidity and Capital Resources” for further definition of maintenance capital expenditures). Maintenance capital expenditures are capital expenditures made where we add on to or improve capital assets owned, or acquire or construct new capital assets, if such expenditures are made to maintain, including over the long-term, our operating capacity or revenues. Non-cash mark-to-market of derivative instruments is considered to be non-cash for the purpose of computing Distributable Cash Flow because settlement will not occur until future periods, and will be impacted by future changes in commodity prices. Distributable Cash Flow is used as a supplemental liquidity and performance measure by our management and by external users of our financial statements, such as investors, commercial banks, research analysts and others, to assess our ability to make cash distributions to our unitholders and our general partner. Our Distributable Cash Flow may not be comparable to a similarly titled measure of another company because other entities may not calculate Distributable Cash Flow in the same manner.

49

Our gross margin, segment gross margin, adjusted segment gross margin and adjusted segment EBITDA may not be comparable to a similarly titled measure of another company because other entities may not calculate these measures in the same manner. The following table sets forth our reconciliation of certain non-GAAP measures:

	Three Months Ended June  30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(Millions)
Reconciliation of Non-GAAP Measures
Reconciliation of net income attributable to partners to gross margin:
Net income attributable to partners	$	41.5		$	25.8		$	35.6		$	58.1
Interest expense		8.4			7.3			16.4			14.5
Income tax expense		—			0.1			0.2			0.4
Operating and maintenance expense		21.7			20.6			45.8			39.6
Depreciation and amortization expense		20.1			18.7			40.0			36.5
General and administrative expense		8.6			8.2			17.6			16.8
Other income		(0.1	)		(3.5	)		(0.2	)		(3.5	)
Earnings from unconsolidated affiliates		(10.0	)		(6.4	)		(18.6	)		(20.8	)
Net income attributable to noncontrolling interests		9.7			1.0			13.2			1.1
Gross margin	$	99.9		$	71.8		$	150.0		$	142.7
Non-cash commodity derivative mark-to-market (a)	$	21.8		$	22.3		$	(11.9	)	$	30.1
Reconciliation of segment net income attributable to partners to segment gross margin:
Natural Gas Services segment:
Segment net income attributable to partners	$	48.3		$	41.0		$	37.4		$	75.4
Operating and maintenance expense		15.7			17.0			32.2			33.2
Depreciation and amortization expense		17.4			17.8			34.9			34.8
Other income		—			(0.5	)		—			(0.5	)
Earnings from unconsolidated affiliates		(10.0	)		(6.1	)		(18.6	)		(20.0	)
Net income attributable to noncontrolling interests		9.7			1.0			13.2			1.1
Segment gross margin	$	81.1		$	70.2		$	99.1		$	124.0
Non-cash commodity derivative mark-to-market (a)	$	22.3		$	22.3		$	(11.1	)	$	30.7
Wholesale Propane Logistics segment:
Segment net income (loss) attributable to partners	$	1.3		$	(0.8	)	$	18.8		$	10.0
Operating and maintenance expense		4.2			2.6			7.8			5.2
Depreciation and amortization expense		0.7			0.3			1.4			0.6
Other income		—			(3.0	)		—			(3.0	)
Segment gross margin	$	6.2		$	(0.9	)	$	28.0		$	12.8
Non-cash commodity derivative mark-to-market (a)	$	(0.5	)	$	—		$	(0.8	)	$	(0.6	)
NGL Logistics segment:
Segment net income attributable to partners	$	8.9		$	1.2		$	13.6		$	4.4
Operating and maintenance expense		1.8			1.0			5.8			1.2
Depreciation and amortization expense		2.0			0.6			3.7			1.1
Other income		(0.1	)		—			(0.2	)		—
Earnings from unconsolidated affiliates		—			(0.3	)		—			(0.8	)
Segment gross margin	$	12.6		$	2.5		$	22.9		$	5.9

(a) Non-cash commodity derivative mark-to-market is included in segment gross margin, along with cash settlements for our derivative contracts.

50

	Three Months Ended June  30,						Six Months Ended June 30,
	2011			2010			2011			2010
	(Millions)
Reconciliation of segment net income attributable to partners to adjusted segment EBITDA:
Natural Gas Services segment:
Segment net income attributable to partners	$	48.3		$	41.0		$	37.4		$	75.4
Non-cash commodity derivative mark-to-market (a)		(22.3	)		(22.3	)		11.1			(30.7	)
Depreciation and amortization expense		17.4			17.8			34.9			34.8
Non controlling interest on depreciation and income tax		(3.2	)		(3.6	)		(6.8	)		(6.8	)
Adjusted segment EBITDA	$	40.2		$	32.9		$	76.6		$	72.7
Wholesale Propane Logistics segment:
Segment net income (loss) attributable to partners	$	1.3		$	(0.8	)	$	18.8		$	10.0
Non-cash commodity derivative mark-to-market (a)		0.5		$	—			0.8			0.6
Depreciation and amortization expense		0.7			0.3			1.4			0.6
Adjusted segment EBITDA	$	2.5		$	(0.5	)	$	21.0		$	11.2
NGL Logistics segment:
Segment net income attributable to partners	$	8.9		$	1.2		$	13.6		$	4.4
Depreciation and amortization expense		2.0			0.6			3.7			1.1
Adjusted segment EBITDA	$	10.9		$	1.8		$	17.3		$	5.5

(a) Non-cash commodity derivative mark-to-market is included in segment gross margin, along with cash settlements for our derivative contracts.

51

Critical Accounting Policies and Estimates

Our critical accounting policies and estimates are described in Item 7 in our 2010 Form 10-K. The accounting policies and estimates used in preparing our interim condensed consolidated financial statements for the three and six months ended June 30, 2011 are the same as those described in our 2010 Form 10-K.

Results of Operations

Consolidated Overview

The following table and discussion is a summary of our consolidated results of operations for the three and six months ended June 30, 2011 and 2010. The results of operations by segment are discussed in further detail following this consolidated overview discussion:

	Three Months Ended June 30,						Six Months Ended June 30,						Variance Three Months 2011 vs. 2010						Variance Six Months 2011 vs. 2010
	2011 (b)(c)(d)			2010 (a)(c)(d)			2011 (b)(c)(d)			2010 (a)(c)(d)(e)			Increase (Decrease)			Percent			Increase (Decrease)			Percent
	(Millions, except as indicated)
Operating revenues (h):
Natural Gas Services	$	257.4		$	211.7		$	421.9		$	429.8		$	45.7			22	%	$	(7.9	)		(2	)%
Wholesale Propane Logistics		104.2			62.2			352.0			243.0			42.0			68	%		109.0			45	%
NGL Logistics		12.6			3.6			27.6			8.4			9.0			250	%		19.2			229	%
Intra-segment Eliminations		—			—			(2.2	)		—			—			—	%		2.2			100	%
Total operating revenues		374.2			277.5			799.3			681.2			96.7			35	%		118.1			17	%
Gross margin (f):
Natural Gas Services		81.1			70.2			99.1			124.0			10.9			16	%		(24.9	)		(20	)%
Wholesale Propane Logistics		6.2			(0.9	)		28.0			12.8			7.1			*			15.2			119	%
NGL Logistics		12.6			2.5			22.9			5.9			10.1			404	%		17.0			288	%
Total gross margin		99.9			71.8			150.0			142.7			28.1			39	%		7.3			5	%
Operating and maintenance expense		(21.7	)		(20.6	)		(45.8	)		(39.6	)		1.1			5	%		6.2			16	%
Depreciation and amortization expense		(20.1	)		(18.7	)		(40.0	)		(36.5	)		1.4			7	%		3.5			10	%
General and administrative expense		(8.6	)		(8.2	)		(17.6	)		(16.8	)		0.4			5	%		0.8			5	%
Other income		0.1			0.5			0.2			0.5			(0.4	)		(80	)%		(0.3	)		(60	)%
Other income — affiliates		—			3.0			—			3.0			(3.0	)		(100	)%		(3.0	)		(100	)%
Earnings from unconsolidated affiliates (g)		10.0			6.4			18.6			20.8			3.6			56	%		(2.2	)		(11	)%
Interest expense		(8.4	)		(7.3	)		(16.4	)		(14.5	)		1.1			15	%		1.9			13	%
Income tax expense		—			(0.1	)		(0.2	)		(0.4	)		(0.1	)		(100	)%		(0.2	)		(50	)%
Net income attributable to noncontrolling interests		(9.7	)		(1.0	)		(13.2	)		(1.1	)		8.7			870	%		12.1			1,100	%
Net income attributable to partners	$	41.5		$	25.8		$	35.6		$	58.1		$	15.7			61	%	$	(22.5	)		(39	)%
Other data:
Non-cash commodity derivative mark-to-market	$	21.8		$	22.3		$	(11.9	)	$	30.1		$	(0.5	)		(2	)%	$	(42.0	)		*
Natural gas throughput (MMcf/d) (g)		1,223			1,248			1,247			1,259			(25	)		(2	)%		(12	)		(1	)%
NGL gross production (Bbls/d) (g)		40,754			40,070			40,714			40,148			684			2	%		566			1
Propane sales volume (Bbls/d)		16,538			13,055			28,288			23,205			3,483			27	%		5,083			22	%
NGL pipelines throughput (Bbls/d) (g)		59,129			35,710			52,421			37,810			23,419			66	%		14,611			39	%

52

* Percentage change is not meaningful.

(a) On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million, in a transaction among entities under common control. Transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method. Accordingly, our condensed consolidated financial statements have been adjusted to include the historical results of our 33.33% interest in Southeast Texas for the three and six months ended June 30, 2010.

(b) Includes the results of Atlantic Energy, since July 30, 2010, the date of acquisition, in our Wholesale Propane Logistics segment.

(c) Includes the results of our Wattenberg pipeline, Black Lake pipeline, Marysville NGL storage facility and DJ Basin NGL Fractionators since the dates of acquisition of January 28, 2010, July 30, 2010, December 30, 2010 and March 24, 2011, respectively, in our NGL Logistics Segment.

(d) We utilize commodity derivative instruments to provide stability to distributable cash flows for our proportionate ownership in East Texas as well as all other natural gas services assets, the portion of East Texas owned by DCP Midstream, LLC is unhedged. As such, our consolidated results depict 49.9% of East Texas unhedged.

(e) Included in Natural Gas Services revenue is the effect of the acquisition of the NGL Hedge, contributed by DCP Midstream, LLC in April 2009. The NGL Hedge is a fixed price natural gas liquids derivative by NGL component, which commenced in April 2009 and expired in March 2010.

(f) Gross margin consists of total operating revenues, including commodity derivative activity, less purchases of natural gas, propane and NGLs, and segment gross margin for each segment consists of total operating revenues for that segment, less commodity purchases for that segment. Please read “Reconciliation of Non-GAAP Measures” above.

(g) Includes our proportionate share of the throughput volumes and NGL production of Collbran, Jackson Pipeline Company, or Jackson, Southeast Texas, East Texas, and Discovery and our proportionate earnings of Discovery. Earnings for Discovery include the accretion of the net difference between the carrying amount of the investment and the underlying equity of the investment.

For periods prior to July 30, 2010, includes our 50% share of the throughput volumes and earnings for Black Lake. Black Lake’s earnings included the accretion of the net difference between the carrying amount of the investment and the underlying equity of the investment.

(h) Operating revenues include the impact of commodity derivative activity.

Three Months Ended June 30, 2011 vs. Three Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues increased in 2011 compared to 2010 primarily as a result of the following:

• $53.1 million increase primarily attributable to increased commodity prices, increased volumes and NGL production across certain of our natural gas assets and the East Texas recovery settlement, partially offset by reduced volumes on our Pelico system and changes in contract mix.

• $43.1 million increase primarily attributable to our acquisition of Atlantic Energy, and higher propane prices for our Wholesale Propane Logistics segment; and

• $10.4 million increase in transportation, processing and other revenue, which represents our fee-based revenues, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators and the Wattenberg capital expansion project.

These increases were partially offset by:

• $9.9 million decrease related to commodity derivative activity. This includes an increase in realized cash settlement losses of $9.5 million and a decrease in unrealized gains of $0.4 million due to movements in forward prices of commodities.

53

Gross Margin — Gross margin increased in 2011 compared to 2010, primarily as a result of the following:

• $19.9 million increase for our Natural Gas Services segment, primarily related to higher crude oil and NGL prices, the East Texas recovery settlement, increased volumes and NGL production at certain assets and changes in contract terms;

• $7.1 million increase for our Wholesale Propane Logistics segment primarily as a result of higher per unit margins. 2010 results reflect a planned outage related to our Providence terminal inspection and reduced demand as a result of an early spring and warmer weather; and

• $10.1 million increase for our NGL Logistics segment primarily as a result of acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators and the Wattenberg capital expansion project.

This increase was partially offset by:

• $9.0 million decrease for our Natural Gas Services segment as a result of commodity derivative activities.

Operating and Maintenance Expense — Operating and maintenance expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, Atlantic Energy, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators.

Depreciation and Amortization Expense — Depreciation and amortization expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, Atlantic Energy, an additional 50% interest in Black Lake and the DJ Basin NGL Fractionators.

Other income — affiliates — Other income — affiliates results for 2010 reffect a $3.0 million payment received in the second quarter from Spectra Energy, a supplier for our Wholesale Propane Logistics segment, related to an amendment of a supply agreement to shorten the term of the agreement by two years.

Earnings from Unconsolidated Affiliates — Earnings from unconsolidated affiliates, representing our 40% ownership of Discovery and 33.33% ownership of Southeast Texas, increased in 2011 compared to 2010, due to 2010 results reflecting a different business structure and cash flow profile for Southeast Texas, partially offset by the impact of the moratorium in the Gulf at Discovery. Settlements related to our commodity derivatives in our unconsolidated affiliates are included in segment gross margin.

Net income attributable to noncontrolling interests — Net income attributable to noncontrolling interests increased in 2011 compared to 2010, by $4.2 million as a result of the East Texas recovery settlement. The 2010 results include the impact of turnaround activity at East Texas.

Six Months Ended June 30, 2011 vs. Six Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues increased in 2011 compared to 2010 primarily as a result of the following:

• $43.8 million increase primarily attributable to increased commodity prices, the East Texas recovery settlement, and increased volumes and NGL production across certain of our natural gas assets, partially offset by reduced volumes on our Pelico system and changes in contract mix;

• $110.5 million increase primarily attributable to our acquisition of Atlantic Energy, as well as higher propane prices for our Wholesale Propane Logistics segment; and

• $19.9 million increase in transportation, processing and other revenue, which represents our fee-based revenues, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators and the Wattenberg capital expansion project.

These increases were partially offset by:

• $56.1 million decrease related to commodity derivative activity. This includes unrealized losses in 2011 compared to unrealized gains in 2010, for a decrease of $42.2 million due to movements in forward prices of commodities, and an increase in realized cash settlement losses of $13.9 million.

Gross Margin — Gross margin increased in 2011 compared to 2010, primarily as a result of the following:

• $29.7 million increase for our Natural Gas Services segment primarily as a result of increased commodity prices, the East Texas recovery settlement and increased volumes and NGL production across certain assets, partially offset by reduced volumes on our Pelico system and changes in contract mix;

• $15.2 million increase for our Wholesale Propane Logistics segment primarily as a result of the acquisition of Atlantic Energy and higher per unit margins. 2010 results reflect a planned outage related to our Providence terminal inspection and reduced demand as a result of an early spring and warmer weather; and

54

• $17.0 million increase for our NGL Logistics segment primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators, and the Wattenberg capital expansion project. The 2010 results include a market opportunity at Seabreeze.

This increase was partially offset by:

• $54.6 million decrease for our Natural Gas Services segment as a result of commodity derivative activities.

Operating and Maintenance Expense — Operating and maintenance expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, Atlantic Energy, an additional 50% interest in Black Lake and the DJ Basin NGL Fractionators.

Depreciation and Amortization Expense — Depreciation and amortization expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, Atlantic Energy, an additional 50% interest in Black Lake and the DJ Basin NGL Fractionators.

Other income — affiliates — Other income — affiliates results for 2010 reflect a $3.0 million payment received in the second quarter from Spectra Energy, a supplier for our Wholesale Propane Logistics segment, related to an amendment of a supply agreement to shorten the term of the agreement by two years.

Earnings from Unconsolidated Affiliates — Earnings from unconsolidated affiliates decreased in 2011 compared to 2010 reflecting the impact of the moratorium in the Gulf and timing of expenditures at Discovery, and our additional interest in Black Lake. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction we account for Black Lake as a consolidated subsidiary. 2010 results reflect a different business structure and cash flow profile for Southeast Texas.

Net income attributable to noncontrolling interests —Net income attributable to noncontrolling interests increased in 2011 compared to 2010, by $4.2 million as a result of the East Texas recovery settlement. The 2010 results include the impact of near record cold weather in the first quarter and turnaround activities at East Texas.

55

Results of Operations — Natural Gas Services Segment

This segment consists of our Northern Louisiana system, our Southern Oklahoma system, our Wyoming system, our Michigan system, our 33.33% interest in the Southeast Texas system, our 50.1% interest in the East Texas system, our 75% interest in the Colorado system, and our 40% limited liability company interest in Discovery:

	Three Months Ended June 30,						Six Months Ended June 30,						Variance Three Months 2011 vs. 2010						Variance Six Months 2011 vs. 2010
	2011 (a)			2010 (a)(b)			2011 (a)			2010 (a)(b)(c)			Increase (Decrease)			Percent			Increase (Decrease)			Percent
	(Millions, except as indicated)
Operating revenues:
Sales of natural gas, NGLs and condensate	$	218.1		$	165.2		$	396.8		$	352.8		$	52.9			32	%	$	44.0			12	%
Transportation, processing and other		26.0			24.2			51.2			48.5			1.8			7	%		2.7			6	%
Gains (losses) from commodity derivative activity		13.3			22.3			(26.1	)		28.5			(9.0	)		(40	)%		(54.6	)		(192	)%
Total operating revenues		257.4			211.7			421.9			429.8			45.7			22	%		(7.9	)		(2	)%
Purchases of natural gas and NGLs		176.3			141.5			322.8			305.8			34.8			25	%		17.0			6	%
Segment gross margin (d)		81.1			70.2			99.1			124.0			10.9			16	%		(24.9	)		(20	)%
Operating and maintenance expense		(15.7	)		(17.0	)		(32.2	)		(33.2	)		(1.3	)		(8	)%		(1.0	)		(3	)%
Depreciation and amortization expense		(17.4	)		(17.8	)		(34.9	)		(34.8	)		(0.4	)		(2	)%		0.1			—	%
Other income		—			0.5			—			0.5			(0.5	)		(100	)%		(0.5	)		(100	)%
Earnings from unconsolidated affiliates (e)		10.0			6.1			18.6			20.0			3.9			64	%		(1.4	)		(7	)%
Segment net income		58.0			42.0			50.6			76.5			16.0			38	%		(25.9	)		(34	)%
Segment net income attributable to noncontrolling interests		(9.7	)		(1.0	)		(13.2	)		(1.1	)		8.7			870	%		12.1			1,100	%
Segment net income attributable to partners	$	48.3		$	41.0		$	37.4		$	75.4		$	7.3			18	%	$	(38.0	)		(50	)%
Other data:
Non-cash commodity derivative mark-to-market	$	22.3		$	22.3		$	(11.1	)	$	30.7		$	—			—	%	$	(41.8	)		*
Natural gas throughput (MMcf/d) (e)		1,223			1,248			1,247			1,259			(25	)		(2	)%		(12	)		(1	)%
NGL gross production (Bbls/d) (e)		40,754			40,070			40,714			40,148			684			2	%		566			1	%

* Percentage change is not meaningful.

(a) We utilize commodity derivative instruments to provide stability to distributable cash flows for our ownership in East Texas as well as all other natural gas services assets, the portion of East Texas owned by DCP Midstream, LLC is unhedged. As such, our consolidated results depict 49.9% of East Texas unhedged.

(b) On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million, in a transaction among entities under common control. Transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method. Accordingly, our condensed consolidated financial statements have been adjusted to include the historical results of Southeast Texas for the three and six months ended June 30, 2010.

(c) Includes the effect of the acquisition of the NGL Hedge, contributed by DCP Midstream, LLC in April 2009 in gains (losses) from commodity derivative activity. The NGL Hedge is a fixed price natural gas liquids derivative by NGL component, which commenced in April 2009 and expired in March 2010.

(d) Segment gross margin consists of total operating revenues, including commodity derivative activity, less purchases of natural gas and NGLs. Please read “Reconciliation of Non-GAAP Measures” above.

56

(e) Includes our proportionate share of the throughput volumes and NGL production of Collbran, Jackson, Southeast Texas, East Texas and Discovery and our proportionate share of the earnings of Discovery and Southeast Texas for each period presented. Earnings for Discovery include the accretion of the net difference between the carrying amount of the investment and the underlying equity of the investment.

Three Months Ended June 30, 2011 vs. Three Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues increased in 2011 compared to 2010, primarily as a result of the following:

• $45.9 million increase attributable to increased commodity prices, which impact both sales and purchases;

• $5.8 million increase attributable to the East Texas recovery settlement; and

• $3.0 million increase attributable to increased volumes and NGL production cross certain assets, partially offset by decreased volumes on our Pelico system and changes in contract mix.

These increases were partially offset by:

• $9.0 million decrease related to commodity derivative activity. This includes an increase in realized cash settlement losses of $9.1 million, partially offset by an increase of $0.1 million in unrealized gains.

Purchases of Natural Gas and NGLs — Purchases of natural gas and NGLs increased in 2011 compared to 2010, primarily as a result of increases in commodity prices, which impact both purchases and sales.

Segment Gross Margin — Segment gross margin increased in 2011 compared to 2010, primarily as a result of the following:

• $10.0 million increase as a result of higher crude an NGL prices;

• $5.8 million increase attributable to the East Texas recovery settlement; and

• $4.1 million increase attributable to increased volumes and NGL production across certain assets and changes in contract terms.

These increases were partially offset by:

• $9.0 million decrease related to commodity derivative activities as discussed in the Operating Revenues section above.

Operating and Maintenance Expense — Operating and maintenance expense decreased in 2011 compared to 2010 due to timing of expenditures.

Depreciation and Amortization Expense — Depreciation and amortization expense remained relatively constant in 2011 compared to 2010.

Earnings from Unconsolidated Affiliates — Earnings from unconsolidated affiliates, representing our 40% ownership of Discovery and 33.33% ownership of Southeast Texas, increased in 2011 compared to 2010, due to 2010 results reflecting a different business structure and cash flow profile for Southeast Texas, partially offset by the impact of the moratorium in the Gulf at Discovery. Settlements related to our commodity derivatives in our unconsolidated affiliates are included in segment gross margin.

Segment net income attributable to noncontrolling interests — Segment net income attributable to noncontrolling interests increased in 2011 compared to 2010, by $4.2 million attributable to the East Texas recovery settlement. 2010 results include the impact of turnaround activity at East Texas.

Natural Gas Throughput — Natural gas transported, processed and/or treated decreased in 2011 compared to 2010 primarily as a result of reduced volumes on our Pelico system.

NGL Gross Production — NGL production increased modestly in 2011 compared to 2010 primarily attributable to increased throughput volumes on certain assets.

57

Six Months Ended June 30, 2011 vs. Six Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues remained relatively stable in 2011 compared to 2010, primarily as a result of the following:

• $54.6 million decrease related to commodity derivative activity. This includes unrealized losses in 2011 compared to unrealized gains in 2010, for a decrease of $42.0 million due to movements in forward prices of commodities, and an increase in realized cash settlement losses of $12.6 million; and

• $6.5 million decrease attributable to reduced volumes on our Pelico system and changes in contract mix, partially offset by increased volumes and NGL production across certain assets and an increase in transportation, processing and other revenue.

These decreases were partially offset by:

• $47.4 million increase attributable to increased commodity prices, which impact both sales and purchases;

• $5.8 million increase attributable to the East Texas recovery settlement; and

Purchases of Natural Gas and NGLs — Purchases of natural gas and NGLs increased in 2011 compared to 2010, primarily as a result of increases in commodity prices, which impact both purchases and sales.

Segment Gross Margin — Segment gross margin decreased in 2011 compared to 2010, primarily as a result of the following:

• $54.6 million decrease related to commodity derivative activities as discussed in the Operating Revenues section above.

This decrease was partially offset by:

• $13.2 million increase as a result of higher crude oil and NGL prices;

• $10.7 million increase primarily attributable to increased volumes and NGL production across certain assets and changes in contract terms; and

• $5.8 million increase attributable to the East Texas recovery settlement.

Operating and Maintenance Expense — Operating and maintenance expense decreased modestly in 2011 compared to 2010 due to timing of expenditures.

Depreciation and Amortization Expense — Depreciation and amortization expense was remained relatively constant in 2011 compared to 2010.

Earnings from Unconsolidated Affiliates — Earnings from unconsolidated affiliates, representing our 40% ownership of Discovery and 33.33% ownership of Southeast Texas, decreased in 2011 compared to 2010, due to the impact of the moratorium in the Gulf and timing of expenditures at Discovery. 2010 results reflect business interruption recoveries and a different business structure and cash flow profile for southeast Texas. Settlements related to our commodity derivatives in our unconsolidated affiliates are included in segment gross margin.

Segment net income attributable to noncontrolling interests — Segment net income attributable to noncontrolling interests increased in 2011 compared to 2010, by $4.2 million attributable to the East Texas recovery settlement. The 2010 results include the impact of near record cold weather in the first quarter and turnaround activity at East Texas.

Natural Gas Throughput — Natural gas transported, processed and/or treated was relatively stable in 2011 compared to 2010.

NGL Gross Production — NGL production was relatively stable in 2011 compared to 2010.

58

Results of Operations — Wholesale Propane Logistics Segment

This segment consists of our propane terminals, which include six owned and operated rail terminals, one owned marine import terminal, one leased marine terminal, one pipeline terminal and access to several open-access propane pipeline terminals:

	Three Months Ended June 30,						Six Months Ended June 30,						Variance Three Months 2011 vs. 2010						Variance Six Months 2011 vs. 2010
													Increase						Increase
	2011 (a)			2010			2011 (a)			2010			(Decrease)			Percent			(Decrease)			Percent
	(Millions, except as indicated)
Operating revenues:
Sales of propane	$	104.9		$	61.8		$	353.3		$	242.8		$	43.1			70	%	$	110.5			46	%
Other		—			0.2			0.2			0.2			(0.2	)		(100	)%		—			—	%
(Losses) gains from commodity derivative activity		(0.7	)		0.2			(1.5	)		—			(0.9	)		(450	)%		(1.5	)		(100	)%
Total operating revenues		104.2			62.2			352.0			243.0			42.0			68	%		109.0			45	%
Purchases of propane		98.0			63.1			324.0			230.2			34.9			55	%		93.8			41	%
Segment gross margin (b)		6.2			(0.9	)		28.0			12.8			7.1			789	%		15.2			119	%
Operating and maintenance expense		(4.2	)		(2.6	)		(7.8	)		(5.2	)		1.6			62	%		2.6			50	%
Depreciation and amortization expense		(0.7	)		(0.3	)		(1.4	)		(0.6	)		0.4			133	%		0.8			133	%
Other income — affiliates		—			3.0			—			3.0			(3.0	)		(100	)%		(3.0	)		(100	)%
Segment net income (loss) attributable to partners	$	1.3		$	(0.8	)	$	18.8		$	10.0		$	2.1			262	%	$	8.8			88	%
Other data:
Non-cash commodity derivative mark-to-market	$	(0.5	)	$	—		$	(0.8	)	$	(0.6	)	$	0.5			100	%	$	0.2			33	%
Propane sales volume (Bbls/d)		16,538			13,055			28,288			23,205			3,483			27	%		5,083			22	%

* Percentage change is not meaningful.

(a) Includes the results of our Chesapeake terminal, acquired July 30, 2010 from Atlantic Energy.

(b) Segment gross margin consists of total operating revenues, including commodity derivative activity, less purchases of propane. Please read “Reconciliation of Non-GAAP Measures” above.

Three Months Ended June 30, 2011 vs. Three Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues increased in 2011 compared to 2010, primarily as a result of the following:

• $24.4 million increase attributable to higher propane prices, which impacts both purchases and sales; and

• $18.7 million increase primarily attributable to our acquisition of Atlantic Energy.

These increases were partially offset by:

• $0.9 million decrease related to commodity derivative activity.

Purchases of Propane — Purchases of propane increased in 2011 compared to 2010 due to higher propane prices, which impact both sales and purchases, and our acquisition of Atlantic Energy.

59

Segment Gross Margin — Segment gross margin increased in 2011 compared to 2010, primarily as a result of increased volumes and higher per unit margins. 2010 results reflect a planned outage related to our Providence terminal inspection and reduced demand as a result of an early spring and warmer weather.

Operating and Maintenance Expense — Operating and maintenance expense increased in 2011 compared to 2010, primarily as a result of our acquisition of Atlantic Energy.

Depreciation and Amortization Expense — Depreciation and amortization expense increased in 2011 compared to 2010, primarily as a result of our acquisition of Atlantic Energy.

Other income — affiliates — Other income — affiliates results for 2010 reflect a $3.0 million payment received in the second quarter from Spectra Energy, related to an amendment of a supply agreement to shorten the term of the agreement by two years.

Propane Sales Volume —Propane sales volumes increased in 2011 compared to 2010 partially as a result the acquisition of Atlantic Energy. 2010 results reflect a planned outage related to our Providence terminal inspection and reduced demand as a result of an early spring and warmer weather.

Six Months Ended June 30, 2011 vs. Six Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues increased in 2011 compared to 2010, primarily as a result of the following:

• $59.2 million increase primarily attributable to our acquisition of Atlantic Energy; and

• $51.3 million increase attributable to higher propane prices, which impacts both purchases and sales.

These increases were partially offset by:

• $1.5 million decrease related to commodity derivative activity.

Purchases of Propane — Purchases of propane increased in 2011 compared to 2010 due to higher propane prices, which impact both sales and purchases, and our acquisition of Atlantic Energy.

Segment Gross Margin — Segment gross margin increased in 2011 compared to 2010, primarily as a result of increased volumes and higher per unit margins, and our acquisition of Atlantic Energy. 2010 results reflect a planned outage related to our Providence terminal inspection and reduced demand as a result of an early spring and warmer weather.

Operating and Maintenance Expense — Operating and maintenance expense increased in 2011 compared to 2010, primarily as a result of our acquisition of Atlantic Energy.

Depreciation and Amortization Expense — Depreciation and amortization expense increased in 2011 compared to 2010, primarily as a result of our acquisition of Atlantic Energy.

Other income — affiliates — Other income — affiliates results for 2010 reflect a $3.0 million payment received in the second quarter from Spectra Energy, a supplier for our wholesale Propane Logistics segment, related to an amendment of a supply agreement to shorten the term of the agreement by two years.

Propane Sales Volume — Propane sales volumes increased in 2011 compared to 2010, primarily as a result of our acquisition of Atlantic Energy. 2010 results reflect a planned outage related to our Providence terminal inspection and reduced demand as a result of an early spring and warmer weather.

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Results of Operations — NGL Logistics Segment

The segment consists of the Seabreeze and Wilbreeze intrastate NGL pipelines, the Wattenberg and Black Lake interstate NGL pipelines, the NGL storage facility in Michigan and the DJ Basin NGL Fractionators in Colorado:

	Three Months Ended June 30,						Six Months Ended June 30,						Variance Three Months 2011 vs. 2010						Variance Six Months 2011 vs. 2010
	2011 (b)(d)			2010 (c)			2011 (b)(d)			2010 (b)(c)			Increase (Decrease)			Percent			Increase (Decrease)			Percent
	(Millions, except as indicated)
Operating revenues:
Sales of NGLs	$	0.1		$	1.0		$	4.9		$	2.8		$	(0.9	)		(90	)%	$	2.1			75	%
Transportation, processing and other		12.5			2.6			22.7			5.6			9.9			381	%		17.1			305	%
Total operating revenues		12.6			3.6			27.6			8.4			9.0			250	%		19.2			229	%
Purchases of NGLs		—			1.1			4.7			2.5			(1.1	)		(100	)%		2.2			88	%
Segment gross margin (a)		12.6			2.5			22.9			5.9			10.1			404	%		17.0			288	%
Operating and maintenance expense		(1.8	)		(1.0	)		(5.8	)		(1.2	)		0.8			80	%		4.6			383	%
Depreciation and amortization expense		(2.0	)		(0.6	)		(3.7	)		(1.1	)		1.4			233	%		2.6			236	%
Other income		0.1			—			0.2			—			0.1			100	%		0.2			100	%
Earnings from unconsolidated affiliates (c)		—			0.3			—			0.8			(0.3	)		(100	)%		(0.8	)		(100	)%
Segment net income attributable to partners	$	8.9		$	1.2		$	13.6		$	4.4		$	7.7			642	%	$	9.2			209	%
Other data:
NGL pipelines throughput (Bbls/d) (c)		59,129			35,710			52,421			37,810			23,419			66	%		14,611			39	%

* Percentage change is not meaningful.

(a) Segment gross margin consists of total operating revenues less purchases of NGLs. Please read “Reconciliation of Non-GAAP Measures” above.

(b) Includes the results of our Wattenberg pipeline and our Black Lake pipeline since the dates of acquisition of January 28, 2010 and July 30, 2010, respectively.

(c) For periods prior to July 30, 2010, includes our 50% share of the throughput volumes and earnings for Black Lake. Black Lake’s earnings included the accretion of the net difference between the carrying amount of the investment and the underlying equity of the investment.

(d) Includes the results of our Marysville NGL storage facility and our DJ Basin NGL Fractionators since the dates of acquisition of December 30, 2010 and March 24, 2011, respectively.

Three Months Ended June 30, 2011 vs. Three Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators, and the Wattenberg capital expansion project.

Segment Gross Margin — Segment gross margin increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators, the Wattenberg capital expansion project, and increased throughput on other pipelines.

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Operating and Maintenance Expense — Operating and maintenance expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake and the DJ Basin NGL Fractionators.

Depreciation and Amortization Expense — Depreciation and amortization expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of Marysville NGL storage facility, an additional 50% interest in Black Lake and the DJ Basin NGL Fractionators.

NGL Pipelines Throughput — NGL pipelines throughput increased in 2011 compared to 2010 as a result of our acquisition an additional 50% interest in Black Lake, the Wattenberg capital expansion project and volume growth on our pipelines.

Six Months Ended June 30, 2011 vs. Six Months Ended June 30, 2010

Total Operating Revenues — Total operating revenues increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators and the Wattenberg capital expansion project. The 2010 results include a market opportunity at Seabreeze.

Segment Gross Margin — Segment gross margin increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake, the DJ Basin NGL Fractionators and the Wattenberg capital expansion project. The 2010 results include a market opportunity at Seabreeze.

Operating and Maintenance Expense — Operating and maintenance expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake and the DJ Basin NGL Fractionators.

Depreciation and Amortization Expense — Depreciation and amortization expense increased in 2011 compared to 2010, primarily as a result of our acquisitions of the Marysville NGL storage facility, an additional 50% interest in Black Lake and the DJ Basin NGL Fractionators.

Earnings from Unconsolidated Affiliates — Earnings from unconsolidated affiliates decreased in 2011 compared to 2010 reflecting the impact of our additional interest in Black Lake. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

NGL Pipelines Throughput — NGL pipelines throughput increased in 2011 compared to 2010 as a result of our acquisition an additional 50% interest in Black Lake, the Wattenberg capital expansion project and volume growth on our pipelines. The 2010 results include a market opportunity at Seabreeze.

Liquidity and Capital Resources

We expect our sources of liquidity to include:

• cash generated from operations;

• cash distributions from our unconsolidated affiliates;

• borrowings under our revolving credit facility;

• issuance of additional partnership units;

• debt offerings;

• guarantees issued by DCP Midstream, LLC, which reduce the amount of collateral we may be required to post with certain counterparties to our commodity derivative instruments; and

• letters of credit.

We anticipate our more significant uses of resources to include:

• capital expenditures;

• quarterly distributions to our unitholders;

• contributions to our unconsolidated affiliates to finance our share of their capital expenditures;

• business and asset acquisitions; and

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• collateral with counterparties to our swap contracts to secure potential exposure under these contracts, which may, at times, be significant depending on commodity price movements, and which is required to the extent we exceed certain guarantees issued by DCP Midstream, LLC and letters of credit we have posted.

We believe that cash generated from these sources will be sufficient to meet our short-term working capital requirements, long-term capital expenditure and acquisition requirements, and quarterly cash distributions for the next twelve months. In the event these sources are not sufficient, we would reduce our discretionary spending.

We routinely evaluate opportunities for strategic investments or acquisitions. Future material investments or acquisitions may require that we obtain additional capital, assume third party debt or incur other long-term obligations. We have the option to utilize both equity and debt instruments as vehicles for the long-term financing of our investment activities and acquisitions.

In March 2011, we executed a public equity offering which generated net proceeds of $139.7 million. The proceeds from the equity issuance were used primarily to fund our growth strategy, including acquisitions and organic expansion. The 2011 acquisitions include our purchase of a 33.33% interest in Southeast Texas for total cash consideration of $150.0 million and the DJ Basin NGL Fractionators for total cash consideration of $30.0 million. Our portion of expansion capital expenditures for the three and six months ended June 30, 2011 was $9.9 million and $18.4 million, respectively.

Based on current and anticipated levels of operations, we believe we have adequate committed financial resources to conduct our business, although deterioration in our operating environment could limit our borrowing capacity, raise our financing costs, as well as impact our compliance with our financial covenant requirements under our Credit Agreement. Our sources of funding could include additional borrowings under our Credit Agreement, the placement of public and private debt, and the issuance of our common units.

Changes in natural gas, NGL and condensate prices and the terms of our processing arrangements have a direct impact on our generation and use of cash from operations due to their impact on net income, along with the resulting changes in working capital. We have mitigated a portion of our anticipated commodity price risk associated with the equity volumes from our gathering and processing activities through 2016 with fixed price commodity swaps and collar arrangements. For additional information regarding our derivative activities, please read “Item7A. Quantitative and Qualitative Disclosures about Market Risk” in our 2010 Form 10-K and “Item 3. Quantitative and Qualitative Disclosures about Market Risk” in this Quarterly Report on Form 10-Q.

Our Credit Agreement consists of a revolving credit facility with capacity of $850.0 million, which matures on June 21, 2012. As of June 30, 2011, the outstanding balance on the revolving credit facility was $461.0 million resulting in unused revolver capacity of $387.9 million, of which approximately $367.0 million was available for general working capital purposes.

Our borrowing capacity is currently limited by the Credit Agreement’s financial covenant requirements. Except in the case of a default, which would make the borrowings under the Credit Agreement fully callable, amounts borrowed under the Credit Agreement will not mature prior to the June 21, 2012 maturity date. As of August 3, 2011, we had approximately $372.9 million of unused capacity under the Credit Agreement.

On September 30, 2010, we issued $250.0 million of 3.25% Senior Notes due October 1, 2015. We received net proceeds, after deducting underwriting discounts and offering expenses, of $247.7 million, which we used to repay funds borrowed under the revolver portion of our Credit Facility.

In March 2011, we issued 3,596,636 common limited partner units at $40.55 per unit. We received proceeds of $139.7 million, net of offering costs.

The counterparties to each of our commodity swap contracts are investment-grade rated financial institutions. Under these contracts, we may be required to provide collateral to the counterparties in the event that our potential payment exposure exceeds a predetermined collateral threshold. Collateral thresholds are set by us and each counterparty, as applicable, in the master contract that governs our financial transactions based on our and the counterparty’s assessment of creditworthiness. The assessment of our position with respect to the collateral thresholds are determined on a counterparty by counterparty basis, and are impacted by the representative forward price curves and notional quantities under our swap contracts. Due to the interrelation between the representative crude oil and natural gas forward price curves, it is not practical to determine a single pricing point at which our swap contracts will meet the collateral thresholds as we may transact multiple commodities with the same counterparty. As of August 3, 2011, DCP Midstream, LLC had issued and outstanding parental guarantees totaling $95.0 million in favor of certain counterparties to our commodity derivative instruments to mitigate a portion of our collateral requirements with these

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counterparties. We pay DCP Midstream, LLC a fee of 0.50% per annum on these guarantees. As of August 3, 2011, we had a contingent letter of credit facility for up to $10.0 million, on which we pay a fee of 0.50% per annum. As of August 3, 2011, we had no letters of credit issued on this facility; we will pay a net fee of 1.75% per annum on letters of credit issued on this facility. These parental guarantees and contingent letter of credit facility reduce the amount of cash we may be required to post as collateral. This contingent letter of credit facility was issued directly by a financial institution and does not reduce the available capacity under our credit facility. As of August 3, 2011, we had no cash collateral posted with counterparties. Depending on daily commodity prices, the amount of collateral posted can go up or down on a daily basis. Predetermined collateral thresholds for commodity derivative instruments guaranteed by DCP Midstream, LLC are generally dependent on DCP Midstream, LLC’s credit rating and the thresholds would be reduced to zero in the event DCP Midstream, LLC’s credit rating were to fall below investment grade.

Working Capital — Working capital is the amount by which current assets exceed current liabilities. Current assets are reduced by our quarterly distributions, which are required under the terms of our partnership agreement based on Available Cash, as defined in the partnership agreement. In general, our working capital is impacted by changes in the prices of commodities that we buy and sell, inventory levels, and other business factors that affect our net income and cash flows. Our working capital is also impacted by the timing of operating cash receipts and disbursements, borrowings of and payments on debt, capital expenditures, and increases or decreases in restricted investments and other long-term assets.

We had a working capital deficit of $465.3 million as of June 30, 2011, compared to working capital of $20.8 million as of December 31, 2010. Included in these working capital amounts are net derivative working capital liabilities of $45.7 million and $41.1 million as of June 30, 2011 and December 31, 2010, respectively. The change in working capital is primarily attributable to the conversion of our revolving credit facility, on which we had $461.0 million outstanding as of June 30, 2011, from long-term to short-term and the factors described above. We expect that our future working capital requirements will be impacted by these same factors.

As of June 30, 2011, we had $2.4 million in cash and cash equivalents. Of this balance, $1.5 million was held by subsidiaries we do not wholly own, which we consolidate in our financial results. Other than the cash held by these subsidiaries, this cash balance was available for general corporate purposes. In 2010, Congress passed the Dodd-Frank Wall Street Reform and Consumer Protection Act, which has the potential to impact our cash collateral and reporting requirements for our trading activities and derivative positions depending on the final regulations adopted by the United States Commodity Futures Trading Commission and the U.S. Securities and Exchange Commission.

Cash Flow — Operating, investing and financing activities was as follows:

	Six Months Ended June 30,
	2011			2010
	(Millions)
Net cash provided by operating activities	$	88.6		$	89.7
Net cash used in investing activities	$	(185.9	)	$	(62.6	)
Net cash provided by (used in) financing activities	$	93.0		$	(24.4	)

Our predecessor’s sources of liquidity, prior to its acquisition by us, included cash generated from operations and funding from DCP Midstream, LLC. Our predecessor’s cash receipts were deposited in DCP Midstream, LLC’s bank accounts and all cash disbursements were made from these accounts. Cash transactions for our predecessor were handled by DCP Midstream, LLC and were reflected in partners’ equity as net changes in parent advances to predecessors from DCP Midstream, LLC.

Net Cash Provided by Operating Activities — The changes in net cash provided by operating activities are attributable to our net income adjusted for non-cash charges as presented in the condensed consolidated statements of cash flows and changes in working capital as discussed above.

We paid approximately $15.9 million and $2.0 million for our net hedge cash settlements for the six months ended June 30, 2011 and 2010, respectively. On April 18, 2011, we made an estimated federal tax payment of $29.3 million related to our acquisition of Marysville and the conversion of the entity’s organizational structure from a corporate to a limited liability company. In addition, we received $2.2 million from DCP Midstream, LLC, related to the sale of surplus equipment as of June 30, 2010.

We received cash distributions from unconsolidated affiliates of $24.0 million and $21.0 million during the six months ended June 30, 2011 and 2010, respectively. Distributions exceeded earnings by $5.4 million and $0.2 million for the six months ended June 30, 2011 and 2010, respectively.

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Net Cash Used in Investing Activities — Net cash used in investing activities during the six months ended June 30, 2011 was comprised of: (1) acquisition expenditures of $29.6 million related to our acquisition of our DJ Basin NGL Fractionators; (2) acquisition expenditures of $114.3 million, representing the carrying value of the net assets acquired, related to our acquisition of Southeast Texas; (3) payment of $7.5 million to the seller of Michigan Pipeline & Processing, LLC in relation to our contingent payment agreement; (4) capital expenditures of $29.2 million (our portion of which was $22.4 million and the noncontrolling interest holders’ portion was $6.8 million); and (5) investments in unconsolidated affiliates of $7.1 million; partially offset by (6) a return of investment from unconsolidated affiliates of $1.6 million; and (7) proceeds from sales of assets of $0.2 million.

Net cash used in investing activities during the six months ended June 30, 2010 was comprised of: (1) investments in unconsolidated affiliates of $27.0 million, consisting of our predecessor’s investment in Southeast Texas of $26.3 million to fund the acquisition of the Raywood processing plant and Liberty gathering system and investments in Discovery of $0.7 million; (2) acquisition expenditure of $22.0 million related to our acquisition of the Wattenberg NGL pipeline; and (3) capital expenditures of $25.4 million (our portion of which was $15.7 million and the noncontrolling interest holders’ portion was $9.7 million); partially offset by (4) net proceeds from sale of available-for-sale securities of $10.1 million; and (5) proceeds from sale of assets of $1.7 million.

Net Cash Provided by (Used in) Financing Activities — Net cash provided by financing activities during the six months ended June 30, 2011 was comprised of: (1) proceeds from the issuance of common units net of offering costs of $139.4 million; (2) net borrowing of debt of $63.0 million; and (3) contributions from noncontrolling interests of $5.6 million; partially offset by (4) distributions to our unitholders and general partner of $63.4 million; (5) excess purchase price over the acquired net assets of Southeast Texas of $35.7 million; (6) distributions to noncontrolling interests of $15.8 million; and (7) payment of deferred financing costs of $0.1 million.

Net cash used in financing activities during the six months ended June 30, 2010 was comprised of: (1) distributions to our unitholders and general partner of $49.1 million; (2) distributions to noncontrolling interests of $8.2 million; and (3) purchase of additional interest in a subsidiary of $3.5 million; partially offset by (4) a net change in advances to predecessor from DCP Midstream, LLC of $25.3 million; (5) contributions from noncontrolling interests of $9.1 million; and (6) net borrowings of $2.0 million.

During the six months ended June 30, 2011, total outstanding indebtedness under our $850.0 million Credit Agreement, which includes borrowings under our revolving credit facility, our term loan facility and letters of credit issued under the Credit Agreement, was not less than $425.5 million and did not exceed $591.1 million. The weighted-average indebtedness outstanding for the six months ended June 30, 2011 was $486.4 million.

We had unused revolver capacity, which is available commitments under the Credit Agreement, of $387.9 million as of June 30, 2011.

During the six months ended June 30, 2011, we had the following net movements on our revolving credit facility:

• $150.0 million borrowing to fund the acquisition of our 33.33% interest in Southeast Texas;

• $30.0 million borrowing to fund the purchase of the DJ Basin NGL Fractionators; and

• $29.3 million borrowing to fund the Marysville tax payment; partially offset by

• $139.7 million repayment financed by the issue of 3,596,636 common units in March 2011;

• $6.6 million net repayments.

During the six months ended June 30, 2010, we had the following net movements on our revolving credit facility:

• $22.0 million borrowing to fund the acquisition of the Wattenberg pipeline; and

• $10.0 million borrowing to fund repayment of our term loan facility; partially offset by

• $20.0 million net repayments.

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During the six months ended June 30, 2010, we had a repayment of $10.0 million on our term loan facility and released $10.0 million of restricted investments which were required as collateral for the facility.

We expect to continue to use cash in financing activities for the payment of distributions to our unitholders and general partner. See Note 11 of the Notes to Condensed Consolidated Financial Statements in Item 1. “Financial Statements.”

Capital Requirements — The midstream energy business can be capital intensive, requiring significant investment to maintain and upgrade existing operations. Our capital requirements have consisted primarily of, and we anticipate will continue to consist of the following:

• maintenance capital expenditures, which are cash expenditures where we add on to or improve capital assets owned, including certain system integrity and safety improvements, or acquire or construct new capital assets if such expenditures are made to maintain, including over the long-term, our operating capacity or revenues; and

• expansion capital expenditures, which are cash expenditures for acquisitions or capital improvements where we add on to or improve the capital assets owned, or acquire or construct new gathering lines, treating facilities, processing plants, fractionation facilities, pipelines, terminals, docks, truck racks, tankage and other storage, distribution or transportation facilities and related or similar midstream assets in each case if such addition, improvement, acquisition or construction is made to increase our operating capacity or revenues.

We incur capital expenditures for our consolidated entities and our unconsolidated affiliates. We anticipate maintenance capital expenditures of between $10.0 million and $15.0 million, and expenditures for expansion capital improvements of between $35.0 million and $50.0 million for the year ending December 31, 2011, including $10.0 million for the expansion to storage capacity at our Southeast Texas system. The board of directors may approve additional growth capital during the year, at their discretion.

The following table summarizes our maintenance and expansion capital expenditures for our consolidated entities.

	Six Months Ended June 30, 2011						Six Months Ended June 30, 2010
	Maintenance Capital Expenditures		Expansion Capital Expenditures		Total Consolidated Capital Expenditures		Maintenance Capital Expenditures		Expansion Capital Expenditures		Total Consolidated Capital Expenditures
	(Millions)						(Millions)
Our portion	$	4.0	$	18.4	$	22.4	$	3.9	$	11.8	$	15.7
Noncontrolling interest portion		2.3		4.5		6.8		4.2		5.5		9.7
Total	$	6.3	$	22.9	$	29.2	$	8.1	$	17.3	$	25.4

In addition, we invested cash in unconsolidated affiliates of $7.1 million and $27.0 million during the six months ended June 30, 2011 and 2010, respectively, to fund our share of capital expansion projects. Our expansion capital improvements forecast includes $10.0 million of expenditures, shown as investments in unconsolidated affiliates, for capital improvements related to our January 2011 Southeast Texas acquisition.

We intend to make cash distributions to our unitholders and our general partner. Due to our cash distribution policy, we expect that we will distribute to our unitholders most of the cash generated by our operations. As a result, we expect that we will rely upon external financing sources, which could include debt and common unit issuances, to fund our acquisition and expansion capital expenditures.

We expect to fund future capital expenditures with funds generated from our operations, borrowings under our credit facility and the issuance of additional partnership units or the issuance of long-term debt. If these sources are not sufficient, we will reduce our discretionary spending.

Cash Distributions to Unitholders — Our partnership agreement requires that, within 45 days after the end of each quarter, we distribute all Available Cash, as defined in the partnership agreement. We made cash distributions to our unitholders and general partner of $63.4 million during the six months ended June 30, 2011, as compared to $49.1 million for the same period in 2010. We intend to continue making quarterly distribution payments to our unitholders and general partner to the extent we have sufficient cash from operations after the establishment of reserves.

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Description of the Credit Agreement — The Credit Agreement consists of an $850.0 million revolving credit facility as of June 30, 2011. The Credit Agreement matures on June 21, 2012. As of June 30, 2011, the outstanding balance on the revolving credit facility was $461.0 million resulting in unused revolver capacity of $387.9 million, of which approximately $367.0 million was available for general working capital purposes.

Our obligations under the revolving credit facility are unsecured. The unused portion of the revolving credit facility may be used for letters of credit. As of June 30, 2011 and December 31, 2010, we had $1.1 million and $32.1 million, respectively, of outstanding letters of credit issued under the Credit Agreement.

The term loan facility, which was repaid during the first quarter of 2010, was secured at all times by high-grade securities, in an amount equal to or greater than the outstanding principal amount of the term loan. Upon the repayment of term loan facility during the first quarter of 2010, the amount of our revolving credit facility increased by the amount repaid.

As of June 30, 2011, the weighted-average interest rate on our revolving credit facility was 0.67% per annum, excluding the impact of interest rate swaps.

Description of Debt Securities – On September 30, 2010, we issued $250.0 million of our 3.25% Senior Notes due October 1, 2015. We received net proceeds of $247.7 million, net of underwriters’ fees, related expense and unamortized discounts of $1.5 million, $0.6 million and $0.2 million, respectively which we used to repay funds borrowed under the revolver portion of our Credit Facility. Interest on the notes will be paid semi-annually on April 1 and October 1 of each year. The notes will mature on October 1, 2015, unless redeemed prior to maturity. The underwriters’ fees and related expense are deferred in other long-term assets in our condensed consolidated balance sheets and will be amortized over the term of the notes.

The notes are senior unsecured obligations, ranking equally in right of payment with our existing unsecured indebtedness, including indebtedness under our Credit Facility. We are not required to make mandatory redemption or sinking fund payments with respect to these notes. The securities are redeemable at a premium at our option.

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Total Contractual Cash Obligations and Off-Balance Sheet Obligations

A summary of our total contractual cash obligations as of June 30, 2011, is as follows:

	Payments Due by Period
	Total		Less than 1 year		1-3 years		3-5 years		Thereafter
	(Millions)
Debt (a)	$	779.5	$	490.3	$	26.8	$	262.4	$	—
Operating lease obligations (b)		36.5		14.8		18.9		1.7		1.1
Purchase obligations (c)		593.8		402.9		80.8		78.0		32.1
Other long-term liabilities (d)		12.2		—		0.5		0.2		11.5
Total	$	1,422.0	$	908.0	$	127.0	$	342.3	$	44.7

(a) Includes interest payments on debt that has been swapped to a fixed rate obligation and on debt securities that have been issued. Interest payments on debt that has not been swapped to a fixed rate obligation are not included as these payments are based on floating interest rates and we cannot determine with accuracy the periodic repayment dates or the amounts of the interest payments.

(b) Our operating lease obligations are contractual obligations, and primarily consist of our leased marine propane terminal and railcar leases, both of which provide supply and storage infrastructure for our Wholesale Propane Logistics business and other items. Operating lease obligations also include firm transportation arrangements and natural gas storage for our Pelico system. The firm transportation arrangements supply off-system natural gas to Pelico and the natural gas storage arrangement enables us to maximize the value between the current price of natural gas and the futures market price of natural gas.

(c) Our purchase obligations are contractual obligations and include purchase orders for capital expenditures, various non-cancelable commitments to purchase physical quantities of propane supply for our Wholesale Propane Logistics business and other items. For contracts where the price paid is based on an index, the amount is based on the forward market prices as of June 30, 2011. Purchase obligations exclude accounts payable, accrued interest payable and other current liabilities recognized in the condensed consolidated balance sheets. Purchase obligations also exclude current and long-term unrealized losses on derivative instruments included in the condensed consolidated balance sheet, which represent the current fair value of various derivative contracts and do not represent future cash purchase obligations. These contracts may be settled financially at the difference between the future market price and the contractual price and may result in cash payments or cash receipts in the future, but generally do not require delivery of physical quantities of the underlying commodity. In addition, many of our gas purchase contracts include short and long-term commitments to purchase produced gas at market prices. These contracts, which have no minimum quantities, are excluded from the table.

(d) Other long-term liabilities include $11.1 million of asset retirement obligations and $1.1 million of environmental reserves recognized in the June 30, 2011 condensed consolidated balance sheet.

We have no items that are classified as off balance sheet obligations.

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Recent Accounting Pronouncements

Financial Accounting Standards Board, or FASB, Accounting Standards Update, or ASU, 2011-04 “Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs”, or ASU 2011-04 — In May 2011, the FASB issued ASU 2011-04 which amends Accounting Standards Codification, or ASC, Topic 820 “Fair Value Measurements and Disclosures” to change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements, clarify the FASB’s intent about the application of existing fair value measurement requirements, and change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. The provisions of ASU 2011-04 is effective for us for interim and annual periods beginning after December 15, 2011 and we are currently assessing the impact of adoption on our consolidated results of operations, cash flows and financial position.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

For an in-depth discussion of our market risks, see “Item 7A. Quantitative and Qualitative Disclosures about Market Risk” in our 2010 Form 10-K.

Credit Risk

Our principal customers in the Natural Gas Services segment are large, natural gas marketers and industrial end-users. Our principal customers in the Wholesale Propane Logistics segment are primarily retail propane distributors. In the NGL Logistics Segment, our principal customers include an affiliate of DCP Midstream, LLC, producers and marketing companies. Substantially all of our natural gas, propane and NGL sales are made at market-based prices. This concentration of credit risk may affect our overall credit risk, as these customers may be similarly affected by changes in economic, regulatory or other factors. Where exposed to credit risk, we analyze the counterparties’ financial condition prior to entering into an agreement, establish credit limits, and monitor the appropriateness of these limits on an ongoing basis. We operate under DCP Midstream, LLC’s corporate credit policy. DCP Midstream, LLC’s corporate credit policy, as well as the standard terms and conditions of our agreements, prescribe the use of financial responsibility and reasonable grounds for adequate assurances. These provisions allow our credit department to request that a counterparty remedy credit limit violations by posting cash or letters of credit for exposure in excess of an established credit line. The credit line represents an open credit limit, determined in accordance with DCP Midstream, LLC’s credit policy. Our standard agreements also provide that the inability of a counterparty to post collateral is sufficient cause to terminate a contract and liquidate all positions. The adequate assurance provisions also allow us to suspend deliveries, cancel agreements or continue deliveries to the buyer after the buyer provides security for payment to us in a satisfactory form.

Interest Rate Risk

Interest rates on future credit facility draws and debt offerings could be higher than current levels, causing our financing costs to increase accordingly. Although this could limit our ability to raise funds in the debt capital markets, we expect to remain competitive with respect to acquisitions and capital projects, as our competitors would face similar circumstances.

We mitigate a portion of our interest rate risk with interest rate swaps, which reduce our exposure to market rate fluctuations by converting variable interest rates to fixed interest rates. These interest rate swap agreements convert the interest rate associated with the indebtedness outstanding under our revolving credit facility to a fixed rate obligation, thereby reducing the exposure to market rate fluctuations.

As of June 30, 2011, we had interest rate swap agreements totaling $450.0 million, of which we have designated $425.0 million as cash flow hedges and account for the remaining $25.0 million under the mark-to-market method of accounting. As we generally expect to have variable rate debt levels equal to or exceeding our swap positions during their term, the entire $450.0 million of these arrangements generally mitigate our interest rate risk through June 2012, with $150.0 million extending from June 2012 through June 2014. Based on our current operations, we believe our interest rate swap agreements adequately mitigate our interest rate risk associated with our variable rate debt.

As of June 30, 2011, the effective weighted-average interest rate on our outstanding debt was 4.07%, taking into account our interest rate swap agreements totaling $450.0 million.

Based on the annualized unhedged borrowings under our credit facility of $36.0 million as of June 30, 2011, a 0.5% movement in the base rate or LIBOR rate would result in an approximately $0.2 million annualized increase or decrease in interest expense.

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Commodity Price Risk

We are exposed to the impact of market fluctuations in the prices of natural gas, NGLs and condensate as a result of our gathering, processing, sales and storage activities. For gathering services, we receive fees or commodities from producers to bring the natural gas from the wellhead to the processing plant. For processing services, we either receive fees or commodities as payment for these services, depending on the types of contracts. For storage services, we receive fees in the form of cash or commodities as payment for these services. We employ established policies and procedures to manage our risks associated with these market fluctuations using various commodity derivatives, including forward contracts, swaps, costless collars and futures.

Commodity Cash Flow Protection Activities — We closely monitor the risks associated with commodity price changes on our future operations and, where appropriate, use various fixed price swaps and collar arrangements to mitigate a portion of the effect pricing fluctuations may have on the value of our assets and operations. Depending on our risk management objectives, we may periodically settle a portion of these instruments prior to their maturity.

We enter into derivative financial instruments to mitigate a portion of the cash flow risk of decreased natural gas, NGL and condensate prices associated with our percent-of-proceeds arrangements and gathering operations. We also may enter into natural gas derivatives to lock in margin around our transportation or leased storage assets. Historically, there has been a strong relationship between NGL prices and crude oil prices, with some recent exceptions and limited liquidity and tenor of the NGL financial market; therefore we have historically used crude oil swaps and costless collars to mitigate a portion of our NGL price risk. For the nearer tenor where there is greater liquidity in the NGL derivatives market, we have periodically also utilized NGL derivatives. When the relationship of NGL prices to crude oil prices is at a discount to historical ranges, we experience additional exposure as a result of the relationship where we utilize crude oil swaps to mitigate NGL price exposure. When our crude oil swaps become short-term in nature, we have periodically converted certain crude oil derivatives to NGL derivatives by entering into offsetting crude oil swaps while adding NGL swaps. As a result of these transactions, we have mitigated a portion of our expected natural gas, NGL and condensate commodity price risk through 2016.

The derivative financial instruments we have entered into are typically referred to as “swap” contracts and “collar” arrangements. The swap contracts entitle us to receive payment at settlement from the counterparty to the contract to the extent that the reference price is below the swap price stated in the contract, and we are required to make payment at settlement to the counterparty to the extent that the reference price is higher than the swap price stated in the contract.

We also use commodity collar arrangements, which entitle us to receive payment at settlement from the counterparty to the contract to the extent that the reference price is below the floor price stated in the contract. Conversely, if the reference price is above the ceiling price stated in the contract, we are required to make payment at settlement to the counterparty. If the reference price is between the floor price and the ceiling price, no payment will be made at the settlement of the contract.

We are using the mark-to-market method of accounting for all commodity derivative instruments, which has significantly increased the volatility of our results of operations as we recognize, in current earnings, all non-cash gains and losses from the mark-to-market on derivative activity.

The following tables set forth additional information about our fixed price swaps, and our collar arrangements used to mitigate a portion of our natural gas and NGL price risk associated with our percent-of-proceeds arrangements and our condensate price risk associated with our gathering operations, as of August 3, 2011:

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Commodity Swaps

Period	Commodity	Notional Volume - (Short)/Long Positions	Reference Price	Price Range
July 2011 — December 2014	Natural Gas	(500) MMBtu/d	IFERC Monthly Index Price for Colorado Interstate Gas Pipeline (a)	$5.06/MMBtu
July 2011 — December 2014	Natural Gas	(1000) MMBtu/d	Texas Gas Transmission Price (b)	$4.87/MMBtu
July 2011 — December 2011	Natural Gas	(400) MMBtu/d	IFERC Monthly Index Price for Houston Ship Channel (d)	$4.21/MMBtu
July 2011 — September 2011	NGL’s	(2,476) Bbls/d	Mt.Belvieu Non-TET (e)	$.55-2.52/Gal
October 2011 — December 2011	NGL’s	(2,559) Bbls/d	Mt.Belvieu Non-TET (e)	$.55-2.52/Gal
July 2011 — December 2011	Crude Oil	(2,200) Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$56.75 - $83.80/Bbl
January 2012 — December 2012	Crude Oil	(2,325) Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$66.72 - $99.85/Bbl
January 2013 — December 2013	Crude Oil	(2,250) Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$67.60 - $99.85/Bbl
January 2014 — December 2014	Crude Oil	(1,500) Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$74.90 - $96.08/Bbl
January 2015 — December 2015	Crude Oil	(1,000) Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$92.00-$100.04/Bbl
January 2016 — December 2016	Crude Oil	(500) Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$101.30/Bbl
July 2011 — December 2014	Natural Gas	500 MMBtu/d	Texas Gas Transmission Price (b)	$4.93/MMBtu
July 2011 — September 2011	Crude Oil	1,550 Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$106.58-109.85/Bbl
October 2011 — December 2011	Crude Oil	1,620 Bbls/d	Asian-pricing of NYMEX crude oil futures (c)	$93.40-109.85/Bbl

(a) The Inside FERC index price for natural gas delivered into the Colorado Interstate Gas (CIG) pipeline.

(b) The Inside FERC index price for natural gas delivered into the Texas Gas Transmission pipeline in the North Louisiana area.

(c) Monthly average of the daily close prices for the prompt month NYMEX light, sweet crude oil futures contract (CL).

(d) The Inside FERC monthly published index price for natural gas delivered into the Houston Ship Channel area.

(e) The average monthly OPIS price for Mt. Belvieu Non-TET.

Commodity Collar Arrangements

Period	Commodity	Notional Volume	Reference Price	Collar Price Range
July 2011 — December 2012	Crude Oil	600 Bbls/d (a)	Asian-pricing of NYMEX crude oil futures (b)	$80.00 - $97.40/Bbl
January 2013 — December 2013	Crude Oil	400 Bbls/d (a)	Asian-pricing of NYMEX crude oil futures (b)	$80.00 - $96.50/Bbl

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(a) Reflects separate purchased put and sold call contracts, resulting in a collar arrangement.

(b) Monthly average of the daily close prices for the prompt month NYMEX light, sweet crude oil futures contract (CL).

Our sensitivities for 2011 as shown in the table below are estimated based on our average estimated commodity price exposure and commodity cash flow protection activities for the calendar year 2011, and exclude the impact from non-cash mark-to-market on our commodity derivatives. We utilize crude oil and NGL derivatives to mitigate a portion of our commodity price exposure for NGLs, and show our sensitivity to changes in the relationship between the pricing of NGLs and crude oil. For fixed price natural gas and crude oil, the sensitivities are associated with our unhedged volumes. For our NGL to crude oil price relationship, the sensitivity is associated with both hedged and unhedged equity volumes.

Commodity Sensitivities Excluding Non-Cash Mark-To-Market

	Per Unit Decrease		Unit of Measurement		Estimated Decrease in Annual Net Income Attributable to Partners
					(Millions)
Natural gas prices	$	1.00		MMBtu	$	0.4
Crude oil prices (a)	$	5.00		Barrel	$	3.2
NGL to crude oil price relationship (b)		5 percentage point change		Barrel	$	5.7

(a) Assuming 60% NGL to crude oil price relationship. At crude oil prices outside of our collar range of approximately $80.00 to $97.40, this sensitivity decreases by $0.8 million.

(b) Assuming 60% NGL to crude oil price relationship and $80.00/Bbl crude oil price. Generally, this sensitivity changes by $0.7 million for each $10.00/Bbl change in the price of crude oil. As crude oil prices increase from $80.00/Bbl, we become slightly more sensitive to the change in the relationship of NGL prices to crude oil prices. As crude oil prices decrease from $80.00/Bbl, we become less sensitive to the change in the relationship of NGL prices to crude oil prices.

In addition to the linear relationships in our commodity sensitivities above, additional factors cause us to be less sensitive to commodity price declines. A portion of our net income is derived from fee-based contracts and a certain percentage of liquids processing arrangements that contain minimum fee clauses in which our processing margins convert to fee-based arrangements as NGL prices decline.

The above sensitivities exclude the impact from arrangements where producers on a monthly basis may elect to not process their natural gas in which case we retain a portion of the customers’ natural gas in lieu of NGLs as a fee. The above sensitivities also exclude certain related processing arrangements where we control the processing or by-pass of the production based upon individual economic processing conditions. Under each of these types of arrangements, our processing of the natural gas would yield favorable processing margins. Less than 10% of our gas throughput is associated with these arrangements.

We estimate the following non-cash sensitivities in 2011 related to the mark-to-market on our commodity derivatives associated with our commodity cash flow protection activities:

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Non-Cash Mark-To-Market Commodity Sensitivities

	Per Unit Increase		Unit of Measurement		Estimated Mark-to- Market  Impact (Decrease in Net Income Attributable to Partners)
					(Millions)
Natural gas prices	$	1.00		MMBtu	$	1.3
Crude oil prices	$	5.00		Barrel	$	15.8
NGL prices	$	0.10		Gallon	$	1.9

While the above commodity price sensitivities are indicative of the impact that changes in commodity prices may have on our annualized net income, changes during certain periods of extreme price volatility and market conditions or changes in the relationship of the price of NGLs and crude oil may cause our commodity price sensitivities to vary significantly from these estimates.

The midstream natural gas industry is cyclical, with the operating results of companies in the industry significantly affected by the prevailing price of NGLs, which in turn has been generally related to the price of crude oil. Although the prevailing price of residue natural gas has less short-term significance to our operating results than the price of NGLs, in the long-term the growth and sustainability of our business depends on natural gas prices being at levels sufficient to provide incentives and capital, for producers to increase natural gas exploration and production. To minimize potential future commodity-based pricing and cash flow volatility, we have entered into a series of derivative financial instruments. As a result of these transactions, we have mitigated a portion of our expected natural gas, NGL and condensate commodity price risk relating to the equity volumes associated with our gathering and processing activities through 2016.

Given the historical relationship between NGL prices and crude oil prices and the limited liquidity and tenor of the NGL financial market, we have generally used crude oil derivative instruments to mitigate a portion of NGL price risk. For the nearer tenor where there is greater liquidity in the NGL derivatives market, we have periodically also utilized NGL derivatives. When the relationship of NGL prices to crude oil prices is at a discount to historical ranges, we experience additional exposure as a result of the relationship where we utilize crude oil swaps to mitigate NGL price exposure. When our crude oil swaps become short-term in nature, we have periodically converted certain crude oil derivatives to NGL derivatives by entering into offsetting crude oil swaps while adding NGL swaps.

Based on historical trends, we generally expect NGL prices to directionally follow changes in crude oil prices over the long-term. However, the pricing relationship between NGLs and crude oil may vary, as we believe crude oil prices will in large part be determined by the level of production from major crude oil exporting countries and the demand generated by growth in the world economy, whereas NGL prices are more correlated to supply and U.S. petrochemical demand. We believe that future natural gas prices will be influenced by North American supply deliverability, the severity of winter and summer weather, the level of North American production and drilling activity of exploration and production companies and imports of liquid natural gas, or LNG, from foreign locations. Drilling activity can be adversely affected as natural gas prices decrease. Energy market uncertainty could also further reduce North American drilling activity. Limited access to capital could also decrease drilling. Lower drilling levels over a sustained period would reduce natural gas volumes gathered and processed, but could increase commodity prices, if supply were to fall relative to demand levels.

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Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed by us in the reports that we file or submit to the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified by the Commission’s rules and forms, and that information is accumulated and communicated to the management of our general partner, including our general partner’s principal executive and principal financial officers (whom we refer to as the Certifying Officers), as appropriate to allow timely decisions regarding required disclosure. The management of our general partner evaluated, with the participation of the Certifying Officers, the effectiveness of our disclosure controls and procedures as of June 30, 2011, pursuant to Rule 13a-15(b) under the Exchange Act. Based upon that evaluation, the Certifying Officers concluded that, as of June 30, 2011, our disclosure controls and procedures were effective.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the quarter ended June 30, 2011 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

The information required for this item is provided in Note 17, “Commitments and Contingent Liabilities,” included in Item 8 of our 2010 Form 10-K, which is incorporated by reference into this item.

Item 1A. Risk Factors

In addition to the other information set forth in this report, careful consideration should be given to the risk factors discussed in Part I, “Item 1A. Risk Factors” in our 2010 Form 10-K. An investment in our securities involves various risks. When considering an investment in us, you should consider carefully all of the risk factors described in our 2010 Form 10-K. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial may also materially adversely affect our condensed consolidated results of operations, financial condition and cash flows.

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Item 6. Exhibits

Exhibits

Exhibit Number	Description
3.1	*       First Amended and Restated Agreement of Limited Partnership of DCP Midstream GP, LP (attached as Exhibit 3.4 to DCP Midstream Partners, LP’s Amendment No. 2 to Registration Statement on Form S-1 (File No. 333-128378) filed with the SEC on November 18, 2005).
3.2	*       First Amended and Restated Limited Liability Company Agreement of DCP Midstream GP, LLC (attached as Exhibit 3.6 to DCP Midstream Partners, LP’s Amendment No. 2 to Registration Statement on Form S-1 (File No. 333-128378) filed with the SEC on November 18, 2005).
3.3	*       Second Amended and Restated Agreement of Limited Partnership of DCP Midstream Partners, LP (attached as Exhibit 3.1 to DCP Midstream Partners, LP’s Form 8-K (File No. 001-32678) filed with the SEC on November 7, 2006).
3.4	*       Amendment No. 1 to Amended and Restated Limited Liability Company Agreement of DCP Midstream GP, LLC dated as of January 20, 2009 and Amended and Restated Limited Liability Company Agreement of DCP Midstream GP, LLC dated December 7, 2005 (attached as Exhibit 3.1 to DCP Midstream Partners, LP’s Form 10-K (File No. 001-32678) filed with the SEC on March 5, 2009).
3.5	*       Amendment No. 1 to Second Amended and Restated Agreement of Limited Partnership of DCP Midstream Partners, LP, dated as of April 11, 2008 (attached as Exhibit 4.1 to DCP Midstream Partners, LP’s Form 8-K (File No. 001-32678) filed with the SEC on April 14, 2008).
3.6	*       Amendment No. 2 to the Second Amended and Restated Agreement of Limited Partnership of DCP Midstream Partners, LP (attached as Exhibit 3.1 to DCP Midstream Partners, LP’s Form 8-K (File No. 001-32678) filed with the SEC on April 7, 2009).
10.1	*       Amended and Restated Credit Agreement, dated June 1, 2007, among DCP Midstream Operating, LP, DCP Midstream Partners, LP and Wachovia Bank, National Association as Administrative Agent (attached as Exhibit 10.1 to DCP Midstream Partners, LP’s current report on Form 10-Q (File No. 001-32678) filed with the SEC on November 9, 2010).
10.2	*       Twelfth Amendment to Omnibus Agreement, dated January 1, 2011, among DCP Midstream, LLC, DCP Midstream GP, LLC, DCP Midstream GP, LP, DCP Midstream Partners, LLC, and DCP Midstream Operating, LP (attached as Exhibit 10.19 to DCP Midstream, LP’s Form 10-K (File No. 001-32678) filed with the SEC on March 1, 2011).
10.3	*       First Amendment to Amended and Restated General Partnership Agreement of DCP Southeast Texas, LLC, Gas Supply Resources Holdings, Inc. and DCP Partners SE Texas, LLC (attached as Exhibit 10.22 DCP Midstream, LP’s Form 10-K (File No. 001-32678) filed with the SEC on March 1, 2011).
12.1	Ratio of Earnings to Fixed Charges.
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	Financial statements from the Quarterly Report on Form 10-Q of DCP Midstream Partners, LP for the quarterly period ended June 30, 2011, formatted in XBRL: (i) the Condensed Consolidated Balance Sheets, (ii) the Condensed Consolidated Statements of Operations, (iii) the Condensed Consolidated Statements of Comprehensive Income, (iv) the Condensed Consolidated Statements of Cash Flows, (v) the Condensed Consolidated Statements of Changes in Equity and (vi) the Notes to the Condensed Consolidated Financial Statements.

* Such exhibit has heretofore been filed with the SEC as part of the filing indicated and is incorporated herein by reference.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Denver, State of Colorado, on August 9, 2011.

DCP Midstream Partners, LP
By:	DCP Midstream GP, LP
	its General Partner
By:	DCP Midstream GP, LLC
	its General Partner
By:	/s/ Mark A. Borer
	Name:	Mark A. Borer
	Title:	Chief Executive Officer
By:	/s/ Angela A. Minas
	Name:	Angela A. Minas
	Title:	Vice President and Chief Financial Officer
		(Principal Financial Officer)

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EXHIBIT INDEX

Exhibit Number	Description
3.1 *	First Amended and Restated Agreement of Limited Partnership of DCP Midstream GP, LP (attached as Exhibit 3.4 to DCP Midstream Partners, LP’s Amendment No. 2 to Registration Statement on Form S-1 (File No. 333-128378) filed with the SEC on November 18, 2005).
3.2 *	First Amended and Restated Limited Liability Company Agreement of DCP Midstream GP, LLC (attached as Exhibit 3.6 to DCP Midstream Partners, LP’s Amendment No. 2 to Registration Statement on Form S-1 (File No. 333-128378) filed with the SEC on November 18, 2005).
3.3 *	Second Amended and Restated Agreement of Limited Partnership of DCP Midstream Partners, LP (attached as Exhibit 3.1 to DCP Midstream Partners, LP’s Form 8-K (File No. 001-32678) filed with the SEC on November 7, 2006).
3.4 *	Amendment No. 1 to Amended and Restated Limited Liability Company Agreement of DCP Midstream GP, LLC dated as of January 20, 2009 and Amended and Restated Limited Liability Company Agreement of DCP Midstream GP, LLC dated December 7, 2005 (attached as Exhibit 3.1 to DCP Midstream Partners, LP’s Form 10-K (File No. 001-32678) filed with the SEC on March 5, 2009).
3.5 *	Amendment No. 1 to Second Amended and Restated Agreement of Limited Partnership of DCP Midstream Partners, LP, dated as of April 11, 2008 (attached as Exhibit 4.1 to DCP Midstream Partners, LP’s Form 8-K (File No. 001-32678) filed with the SEC on April 14, 2008).
3.6 *	Amendment No. 2 to the Second Amended and Restated Agreement of Limited Partnership of DCP Midstream Partners, LP (attached as Exhibit 3.1 to DCP Midstream Partners, LP’s Form 8-K (File No. 001-32678) filed with the SEC on April 7, 2009).
10.1 *	Amended and Restated Credit Agreement, dated June 1, 2007, among DCP Midstream Operating, LP, DCP Midstream Partners, LP and Wachovia Bank, National Association as Administrative Agent (attached as Exhibit 10.1 to DCP Midstream Partners, LP’s current report on Form 10-Q (File No. 001-32678) filed with the SEC on November 9, 2010).
10.2 *	Twelfth Amendment to Omnibus Agreement, dated January 1, 2011, among DCP Midstream, LLC, DCP Midstream GP, LLC, DCP Midstream GP, LP, DCP Midstream Partners, LLC, and DCP Midstream Operating, LP (attached as Exhibit 10.19 to DCP Midstream, LP’s Form 10-K (File No. 001-32678) filed with the SEC on March 1, 2011).
10.3 *	First Amendment to Amended and Restated General Partnership Agreement of DCP Southeast Texas, LLC, Gas Supply Resources Holdings, Inc. and DCP Partners SE Texas, LLC (attached as Exhibit 10.22 DCP Midstream, LP’s Form 10-K (File No. 001-32678) filed with the SEC on March 1, 2011).
12.1	Ratio of Earnings to Fixed Charges.
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	Financial statements from the Quarterly Report on Form 10-Q of DCP Midstream Partners, LP for the quarterly period ended June 30, 2011, formatted in XBRL: (i) the Condensed Consolidated Balance Sheets, (ii) the Condensed Consolidated Statements of Operations, (iii) the Condensed Consolidated Statements of Comprehensive Income, (iv) the Condensed Consolidated Statements of Cash Flows, (v) the Condensed Consolidated Statements of Changes in Equity and (vi) the Notes to the Condensed Consolidated Financial Statements.

* Such exhibit has heretofore been filed with the SEC as part of the filing indicated and is incorporated herein by reference.

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EX-12.1

Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES

The table below sets forth the calculation of Ratios of Earnings to Fixed Charges.

	DCP Midstream Partners, LP
	Six Months Ended June  30,			Year Ended December 31,
	2011			2010			2009			2008			2007			2006
				(Millions)
Earnings from continuing operations before fixed charges
Pretax income (loss) from continuing operations before earnings from unconsolidated affiliates	$	17.2		$	24.5		$	(37.0	)	$	124.3		$	(25.0	)	$	58.4
Fixed charges		17.2			29.9			30.3			33.6			27.0			12.6
Amortization of capitalized interest		0.1			0.1			0.1			0.1			—			—
Distributed earnings from unconsolidated affiliates		18.6			28.9			26.9			29.6			35.8			25.9
Less:
Capitalized interest		(0.5	)		(0.2	)		(1.3	)		(0.3	)		(0.2	)		(0.4	)
Earnings from continuing operations before fixed charges	$	52.6		$	83.2		$	19.0		$	187.3		$	37.6		$	96.5
Fixed charges
Interest expense, net of capitalized interest	$	16.3		$	28.8		$	28.3		$	32.6		$	26.0		$	11.4
Capitalized interest		0.5			0.2			1.3			0.3			0.2			0.4
Estimate of interest within rental expense		0.3			0.6			0.5			0.5			0.6			0.7
Amortization of deferred loan costs		0.1			0.3			0.2			0.2			0.2			0.1
Total fixed charges	$	17.2		$	29.9		$	30.3		$	33.6		$	27.0		$	12.6
Ratio of earnings to fixed charges		3.06			2.78			0.63			5.57			1.39			7.66

For purposes of determining the ratio of earnings to fixed charges, earnings are defined as pretax income or loss from continuing operations before earnings from unconsolidated affiliates, plus fixed charges, plus distributed earnings from unconsolidated affiliates, less capitalized interest. Fixed charges consist of interest expensed, capitalized interest, amortization of deferred loan costs, and an estimate of the interest within rental expense.

EX-31.1

Exhibit 31.1

Certification Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, Mark A. Borer, certify that:

1. I have reviewed this quarterly report on Form 10-Q of DCP Midstream Partners, LP for the three and six months ended June 30, 2011;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financials statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting that are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 9, 2011

/s/ Mark A. Borer

Mark A. Borer

Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, Angela A. Minas, certify that:

1. I have reviewed this quarterly report on Form 10-Q of DCP Midstream Partners, LP for the three and six months ended June 30, 2011;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financials statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting that are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 9, 2011

/s/ Angela A. Minas

Angela A. Minas

Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906

of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350)

The undersigned, the Chief Executive Officer of DCP Midstream GP, LLC, a Delaware limited liability company and general partner of DCP Midstream GP, LP, general partner of DCP Midstream Partners, LP (the “Partnership”), hereby certifies that, to his knowledge on the date hereof:

(a) the quarterly report on Form 10-Q of the Partnership for the three and six months ended June 30, 2011, filed on the date hereof with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

/s/ Mark A. Borer

Mark A. Borer

Chief Executive Officer

August 9, 2011

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Partnership and will be retained by the Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906

of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350)

The undersigned, the Chief Financial Officer of DCP Midstream GP, LLC, a Delaware limited liability company and general partner of DCP Midstream GP, LP, general partner of DCP Midstream Partners, LP (the “Partnership”), hereby certifies that, to her knowledge on the date hereof:

(a) the quarterly report on Form 10-Q of the Partnership for the three and six months ended June 30, 2011, filed on the date hereof with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

/s/ Angela A. Minas

Angela A. Minas

Chief Financial Officer

August 9, 2011

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Partnership and will be retained by the Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

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Supplementary Information - Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheets) (Details) (USD $) In Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010		Jun. 30, 2010		Dec. 31, 2009
Cash and cash equivalents	$ 2.4	$ 6.7	[1]	$ 4.8	[2]	$ 2.1	[2]
Accounts receivable	140.6	151.0	[1]
Inventories	42.4	64.1	[1]
Other	2.9	10.2	[1]
Total current assets	188.3	232.0	[1]
Property, plant and equipment, net	1,115.3	1,097.1	[1]
Goodwill and intangible assets, net	263.9	258.6	[1]
Advances receivable - consolidated subsidiaries			[1]
Investments in consolidated subsidiaries			[1]
Investments in unconsolidated affiliates	218.5	216.9	[1]
Other long term-assets	9.0	8.6	[1]
Total assets	1,795.0	1,813.2	[1]
Accounts payable and other current liabilities	653.6	211.2	[1]
Advances payable - consolidated subsidiaries			[1]
Long-term debt	249.8	647.8	[1]
Other long-term liabilities	68.4	103.4	[1]
Total liabilities	971.8	962.4	[1]
Commitments and contingent liabilities			[1]
Predecessor equity		112.6	[1]
Net equity	622.6	545.8	[1]
Accumulated other comprehensive loss	(22.5)	(27.7)	[1]
Total partner's equity	600.1	630.7	[1]
Noncontrolling interests	223.1	220.1	[1]
Total equity	823.2	850.8	[1]	706.2		676.2
Total liabilities and equity	1,795.0	1,813.2	[1]
DCP Midstream Partners, LP [Member]
Cash and cash equivalents			[1]		[2]		[2]
Accounts receivable			[1]
Inventories			[1]
Other			[1]
Total current assets			[1]
Property, plant and equipment, net			[1]
Goodwill and intangible assets, net			[1]
Advances receivable - consolidated subsidiaries	409.3	333.4	[1]
Investments in consolidated subsidiaries	190.8	297.5	[1]
Investments in unconsolidated affiliates			[1]
Other long term-assets			[1]
Total assets	600.1	630.9	[1]
Accounts payable and other current liabilities		0.2	[1]
Advances payable - consolidated subsidiaries			[1]
Long-term debt			[1]
Other long-term liabilities			[1]
Total liabilities		0.2	[1]
Commitments and contingent liabilities			[1]
Predecessor equity			[1]
Net equity	600.1	630.7	[1]
Accumulated other comprehensive loss			[1]
Total partner's equity	600.1	630.7	[1]
Noncontrolling interests			[1]
Total equity	600.1	630.7	[1]
Total liabilities and equity	600.1	630.9	[1]
Subsidiary Issuer [Member]
Cash and cash equivalents	1.5	1.5	[1]	1.7	[2]	1.6	[2]
Accounts receivable			[1]
Inventories			[1]
Other	0.2		[1]
Total current assets	1.7	1.5	[1]
Property, plant and equipment, net			[1]
Goodwill and intangible assets, net			[1]
Advances receivable - consolidated subsidiaries	582.7	534.7	[1]
Investments in consolidated subsidiaries	339.7	436.2	[1]
Investments in unconsolidated affiliates			[1]
Other long term-assets	1.8	2.3	[1]
Total assets	925.9	974.7	[1]
Accounts payable and other current liabilities	480.8	19.5	[1]
Advances payable - consolidated subsidiaries			[1]
Long-term debt	249.8	647.8	[1]
Other long-term liabilities	4.5	9.9	[1]
Total liabilities	735.1	677.2	[1]
Commitments and contingent liabilities			[1]
Predecessor equity			[1]
Net equity	212.1	324.9	[1]
Accumulated other comprehensive loss	(21.3)	(27.4)	[1]
Total partner's equity	190.8	297.5	[1]
Noncontrolling interests			[1]
Total equity	190.8	297.5	[1]
Total liabilities and equity	925.9	974.7	[1]
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	1.9	6.7	[1]	4.8	[2]	1.3	[2]
Accounts receivable	140.6	151.0	[1]
Inventories	42.4	64.1	[1]
Other	2.7	10.2	[1]
Total current assets	187.6	232.0	[1]
Property, plant and equipment, net	1,115.3	1,097.1	[1]
Goodwill and intangible assets, net	263.9	258.6	[1]
Advances receivable - consolidated subsidiaries			[1]
Investments in consolidated subsidiaries			[1]
Investments in unconsolidated affiliates	218.5	216.9	[1]
Other long term-assets	7.2	6.3	[1]
Total assets	1,792.5	1,810.9	[1]
Accounts payable and other current liabilities	173.8	193.0	[1]
Advances payable - consolidated subsidiaries	992.0	868.1	[1]
Long-term debt			[1]
Other long-term liabilities	63.9	93.5	[1]
Total liabilities	1,229.7	1,154.6	[1]
Commitments and contingent liabilities			[1]
Predecessor equity		112.6	[1]
Net equity	340.9	323.9	[1]
Accumulated other comprehensive loss	(1.2)	(0.3)	[1]
Total partner's equity	339.7	436.2	[1]
Noncontrolling interests	223.1	220.1	[1]
Total equity	562.8	656.3	[1]
Total liabilities and equity	1,792.5	1,810.9	[1]
Consolidating Adjustments [Member]
Cash and cash equivalents	(1.0)	(1.5)	[1]	(1.7)	[2]	(0.8)	[2]
Accounts receivable			[1]
Inventories			[1]
Other			[1]
Total current assets	(1.0)	(1.5)	[1]
Property, plant and equipment, net			[1]
Goodwill and intangible assets, net			[1]
Advances receivable - consolidated subsidiaries	(992.0)	(868.1)	[1]
Investments in consolidated subsidiaries	(530.5)	(733.7)	[1]
Investments in unconsolidated affiliates			[1]
Other long term-assets			[1]
Total assets	(1,523.5)	(1,603.3)	[1]
Accounts payable and other current liabilities	(1.0)	(1.5)	[1]
Advances payable - consolidated subsidiaries	(992.0)	(868.1)	[1]
Long-term debt			[1]
Other long-term liabilities			[1]
Total liabilities	(993.0)	(869.6)	[1]
Commitments and contingent liabilities			[1]
Predecessor equity			[1]
Net equity	(530.5)	(733.7)	[1]
Accumulated other comprehensive loss			[1]
Total partner's equity	(530.5)	(733.7)	[1]
Noncontrolling interests			[1]
Total equity	(530.5)	(733.7)	[1]
Total liabilities and equity	$ (1,523.5)	$ (1,603.3)	[1]

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Property, Plant and Equipment (Narrative) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Property, Plant and Equipment
Interest capitalized on construction projects			$ 0.5		$ 0.2
Depreciation expense	18.6	18.0	37.0	35.0
Asset retirement obligations	11.1		11.1		10.8
Accretion expense	$ 0.1	$ 0.1	$ 0.3	$ 0.2

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Allowance for doubtful accounts	$ 0.3	$ 0.5
Common unitholders, units issued	44,083,418	40,478,383
Common unitholders, units outstanding	44,083,418	40,478,383

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Condensed Consolidated Statements Of Operations (USD $) In Millions, except Per Share data	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$ 155.3	$ 93.2		$ 452.8		$ 328.6
Sales of natural gas, propane, NGLs and condensate to affiliates	167.8	134.8		300.0		269.8
Transportation, processing and other	30.4	22.1		60.9		43.7
Transportation, processing and other to affiliates	8.1	4.9		13.2		10.6
Gains (losses) from commodity derivative activity, net	13.2	22.8		(25.7)		28.8
(Losses) from commodity derivative activity, net - affiliates	(0.6)	(0.3)		(1.9)		(0.3)
Total operating revenues	374.2	277.5	[1]	799.3		681.2	[2]
Operating costs and expenses:
Purchases of natural gas, propane and NGLs	190.2	178.1		412.5		369.6
Purchases of natural gas, propane and NGLs from affiliates	84.1	27.6		236.8		168.9
Operating and maintenance expense	21.7	20.6		45.8		39.6
Depreciation and amortization expense	20.1	18.7	[1]	40.0		36.5	[2]
General and administrative expense	3.7	3.4		7.9		7.1
General and administrative expense - affiliates	4.9	4.8		9.7		9.7
Other income	(0.1)	(0.5)	[1]	(0.2)		(0.5)	[2]
Other income - affiliates		(3.0)	[1]			(3.0)	[2]
Total operating costs and expenses	324.6	249.7	[1]	752.5		627.9	[2]
Operating income	49.6	27.8	[1]	46.8		53.3	[2]
Interest expense	(8.4)	(7.3)	[1]	(16.4)		(14.5)	[2]
Earnings from unconsolidated affiliates	10.0	6.4	[1],[3]	18.6		20.8	[2],[3]
Income before income taxes	51.2	26.9	[1]	49.0		59.6	[2]
Income tax expense		(0.1)	[1],[4]	(0.2)	[4]	(0.4)	[2],[4]
Net income	51.2	26.8	[1]	48.8		59.2	[2]
Net income attributable to noncontrolling interests	(9.7)	(1.0)	[1]	(13.2)		(1.1)	[2]
Net income attributable to partners	41.5	25.8	[1]	35.6		58.1	[2]
Net loss (income) attributable to predecessor operations		0.2				(6.3)
General partner's interest in net income	(6.2)	(4.2)		(11.7)		(8.0)
Net income allocable to limited partners	$ 35.3	$ 21.8		$ 23.9		$ 43.8
Net income per limited partner unit - basic	$ 0.80	$ 0.63		$ 0.56		$ 1.27
Net income per limited partner unit - diluted	$ 0.80	$ 0.63		$ 0.56		$ 1.27
Weighted-average limited partner units outstanding - basic	44.1	34.6		42.7		34.6
Weighted-average limited partner units outstanding - diluted	44.2	34.6		42.7		34.6

[1] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[3] As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

[4] Income tax expense relates primarily to the Texas margin tax and the Michigan business tax.

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Risk Management and Hedging Activities (Schedule of Changes in Value of Derivative Instruments) (Details) (Nondesignated [Member], USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Commodity Contract [Member] | Third Party [Member]
Realized	$ (8.9)		$ (14.9)	$ (2.1)
Unrealized	22.1	22.8	(10.8)	30.9
Losses from commodity derivative activity, net - affiliates	13.2	22.8	(25.7)	28.8
Commodity Contract [Member] | Affiliates [Member]
Realized	(0.4)	0.2	(1.0)	0.1
Unrealized	(0.2)	(0.5)	(0.9)	(0.4)
Losses from commodity derivative activity, net - affiliates	(0.6)	(0.3)	(1.9)	(0.3)
Interest Rate Swap [Member] | Third Party [Member]
Realized	(1.3)		(2.3)
Unrealized	1.2		2.8
Losses from commodity derivative activity, net - affiliates	$ (0.1)		$ 0.5

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Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) (USD $) In Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Goodwill and Intangible Assets
Beginning of period	$ 139.3	$ 92.1
Acquisitions	7.6	47.2
End of period	$ 146.9	$ 139.3

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Supplementary Information - Condensed Consolidating Financial Information (Condensed Consolidating Statements of Cash Flows) (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
Net cash (used in) provided by operating activities	$ 88.6		$ 89.7	[1]
Capital expenditures	(29.2)		(25.4)	[1]
Acquisitions, net of cash acquired	(151.4)		(22.0)	[1]
Investments in unconsolidated affiliates	(7.1)		(27.0)	[1]
Return of investment from unconsolidated affiliates	1.6
Proceeds from sale of assets	0.2		1.7	[1]
Proceeds from sales of available-for-sale securities			10.1	[1]
Net cash provided by (used in) investing activities	(185.9)		(62.6)	[1]
Proceeds from debt	716.0		210.6	[1]
Payments of debt	(653.0)		(208.6)	[1]
Payment of deferred financing costs	(0.1)
Proceeds from issuance of common units, net of offering costs	139.4
Excess purchase price over acquired assets	(35.7)
Distributions to unitholders and general partner	(63.4)		(49.1)	[1]
Distributions to noncontrolling interests	(15.8)		(8.2)	[1]
Contributions from noncontrolling interests	5.6		9.1	[1]
Net change in advances to predecessor from DCP Midstream, LLC			25.3	[1]
Purchase of additional interest in a subsidiary			(3.5)	[1]
Net cash provided by (used in) financing activities	93.0		(24.4)	[1]
Net change in cash and cash equivalents	(4.3)		2.7	[1]
Cash and cash equivalents, beginning of period	6.7	[2]	2.1	[1]
Cash and cash equivalents, end of period	2.4		4.8	[1]
DCP Midstream Partners, LP [Member]
Net cash (used in) provided by operating activities	(76.0)		49.1	[1]
Capital expenditures				[1]
Acquisitions, net of cash acquired				[1]
Investments in unconsolidated affiliates				[1]
Proceeds from sale of assets				[1]
Proceeds from sales of available-for-sale securities				[1]
Net cash provided by (used in) investing activities				[1]
Proceeds from debt				[1]
Payments of debt				[1]
Proceeds from issuance of common units, net of offering costs	139.4
Distributions to unitholders and general partner	(63.4)		(49.1)	[1]
Distributions to noncontrolling interests				[1]
Contributions from noncontrolling interests				[1]
Net change in advances to predecessor from DCP Midstream, LLC				[1]
Purchase of additional interest in a subsidiary				[1]
Net cash provided by (used in) financing activities	76.0		(49.1)	[1]
Net change in cash and cash equivalents				[1]
Cash and cash equivalents, beginning of period		[2]		[1]
Cash and cash equivalents, end of period				[1]
Subsidiary Issuer [Member]
Net cash (used in) provided by operating activities	(62.9)		(12.0)	[1]
Capital expenditures				[1]
Acquisitions, net of cash acquired				[1]
Investments in unconsolidated affiliates				[1]
Proceeds from sale of assets				[1]
Proceeds from sales of available-for-sale securities			10.1	[1]
Net cash provided by (used in) investing activities			10.1	[1]
Proceeds from debt	716.0		210.6	[1]
Payments of debt	(653.0)		(208.6)	[1]
Payment of deferred financing costs	(0.1)
Distributions to unitholders and general partner				[1]
Distributions to noncontrolling interests				[1]
Contributions from noncontrolling interests				[1]
Net change in advances to predecessor from DCP Midstream, LLC				[1]
Purchase of additional interest in a subsidiary				[1]
Net cash provided by (used in) financing activities	62.9		2.0	[1]
Net change in cash and cash equivalents			0.1	[1]
Cash and cash equivalents, beginning of period	1.5	[2]	1.6	[1]
Cash and cash equivalents, end of period	1.5		1.7	[1]
Non-Guarantor Subsidiaries [Member]
Net cash (used in) provided by operating activities	227.0		53.5	[1]
Capital expenditures	(29.2)		(25.4)	[1]
Acquisitions, net of cash acquired	(151.4)		(22.0)	[1]
Investments in unconsolidated affiliates	(7.1)		(27.0)	[1]
Return of investment from unconsolidated affiliates	1.6
Proceeds from sale of assets	0.2		1.7	[1]
Proceeds from sales of available-for-sale securities				[1]
Net cash provided by (used in) investing activities	(185.9)		(72.7)	[1]
Proceeds from debt				[1]
Payments of debt				[1]
Excess purchase price over acquired assets	(35.7)
Distributions to unitholders and general partner				[1]
Distributions to noncontrolling interests	(15.8)		(8.2)	[1]
Contributions from noncontrolling interests	5.6		9.1	[1]
Net change in advances to predecessor from DCP Midstream, LLC			25.3	[1]
Purchase of additional interest in a subsidiary			(3.5)	[1]
Net cash provided by (used in) financing activities	(45.9)		22.7	[1]
Net change in cash and cash equivalents	(4.8)		3.5	[1]
Cash and cash equivalents, beginning of period	6.7	[2]	1.3	[1]
Cash and cash equivalents, end of period	1.9		4.8	[1]
Consolidating Adjustments [Member]
Net cash (used in) provided by operating activities	0.5		(0.9)	[1]
Capital expenditures				[1]
Acquisitions, net of cash acquired				[1]
Investments in unconsolidated affiliates				[1]
Proceeds from sale of assets				[1]
Proceeds from sales of available-for-sale securities				[1]
Net cash provided by (used in) investing activities				[1]
Proceeds from debt				[1]
Payments of debt				[1]
Distributions to unitholders and general partner				[1]
Distributions to noncontrolling interests				[1]
Contributions from noncontrolling interests				[1]
Net change in advances to predecessor from DCP Midstream, LLC				[1]
Purchase of additional interest in a subsidiary				[1]
Net cash provided by (used in) financing activities				[1]
Net change in cash and cash equivalents	0.5		(0.9)	[1]
Cash and cash equivalents, beginning of period	(1.5)	[2]	(0.8)	[1]
Cash and cash equivalents, end of period	$ (1.0)		$ (1.7)	[1]

[1] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Commitments and Contingent Liabilities

6 Months Ended

Jun. 30, 2011

Commitments and Contingent Liabilities

Commitments and Contingent Liabilities

15. Commitments and Contingent Liabilities

Litigation — We are a party to various legal proceedings, as well as administrative and regulatory proceedings and commercial disputes that have arisen in the ordinary course of our business. Management currently believes that the ultimate resolution of these matters, taken as a whole, and after consideration of amounts accrued, insurance coverage or other indemnification arrangements, will not have a material adverse effect on our condensed consolidated results of operations, financial position, or cash flows.

Insurance — We renewed our insurance policies in May, June and July 2011 for the 2011-2012 insurance year. We contract with third party and affiliate insurers for: (1) automobile liability insurance for all owned, non-owned and hired vehicles; (2) general liability insurance; (3) excess liability insurance above the established primary limits for general liability and automobile liability insurance; and (4) property insurance, which covers replacement value of real and personal property and includes business interruption/extra expense. These renewals have not resulted in any material change to the premiums we are contracted to pay in the 2011-2012 insurance year compared with the 2010-2011 insurance year. We are jointly insured with DCP Midstream, LLC for directors and officers insurance covering our directors and officers for acts related to our business activities. All coverage is subject to certain limits and deductibles, the terms and conditions of which are common for companies that are of similar size to us and with similar types of operations.

Our insurance on Discovery for the 2011-2012 insurance year includes general and excess liability onshore property damage, including named windstorm and business interruption, and offshore non-wind property and business interruption insurance. The availability of offshore named windstorm property and business interruption insurance has been significantly reduced over the past few years as a result of higher industry-wide damage claims. Additionally, the named windstorm property and business interruption insurance that is available comes at uneconomic premium levels, higher deductibles and lower coverage limits. As such, Discovery has elected to not purchase offshore named windstorm property and business interruption insurance coverage for the 2011-2012 insurance year.

Environmental — During the first quarter of 2011, we discovered excess emissions at our East Texas gas plant. We met with the Texas Commission on Environmental Quality, or TCEQ, in April 2011 to discuss this matter which was included in Title V reports to the State. The TCEQ has requested detailed follow-up from us and an action plan to address this matter. At this time formal enforcement has not been initiated, although it is not possible to predict what action the TCEQ may take or the cost to address this matter. We do not believe the ultimate resolution of this matter will have a material adverse effect on our consolidated results of operations, financial position or cash flows.

Indemnification — DCP Midstream, LLC has indemnified us for certain potential environmental claims, losses and expenses associated with the operation of the assets of certain of our predecessors.

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Supplemental Cash Flow Information (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Supplemental Cash Flow Information
Cash paid for interest, net of amounts capitalized	$ 2.2	$ 3.2
Cash paid for income taxes, net of income tax refunds	29.9	0.5
Property, plant and equipment acquired with accounts payable	3.0	3.2
Other non-cash additions of property, plant and equipment	0.1	0.2
Acquisition related contingent consideration		1.0
Non-cash change in parent advances	1.7
Non-cash distributions to DCP Midstream, LLC	$ 2.6

XML



Document and Entity Information	6 Months Ended
	Jun. 30, 2011	Aug. 03, 2011
Document and Entity Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Entity Registrant Name	DCP Midstream Partners, LP
Entity Central Index Key	0001338065
Trading Symbol	dpm
Entity Filer Category	Large Accelerated Filer
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		44,083,418

XML



Agreements and Transactions with Affiliates (Transactions with Affiliates) (Details) (USD $) In Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011	Jun. 30, 2010
Sales of natural gas, propane, NGLs and condensate to affiliates	$ 167.8	$ 134.8		$ 300.0	$ 269.8
Transportation, processing and other	8.1	4.9		13.2	10.6
Purchases of natural gas, propane and NGLs from affiliates	84.1	27.6		236.8	168.9
(Losses) from commodity derivative activity, net - affiliates	(0.6)	(0.3)		(1.9)	(0.3)
General and administrative expense	(4.9)	(4.8)		(9.7)	(9.7)
Other income		3.0	[1]		3.0	[2]
Interest expense	8.4	7.3	[1]	16.4	14.5	[2]
DCP Midstream, LLC [Member]
Sales of natural gas, propane, NGLs and condensate to affiliates	158.9	131.9		290.0	265.5
Transportation, processing and other	6.3	2.7		9.5	6.5
Purchases of natural gas, propane and NGLs from affiliates	35.5	23.7		98.5	86.5
(Losses) from commodity derivative activity, net - affiliates	(0.6)	(0.3)		(1.9)	(0.3)
General and administrative expense	4.8	4.8		9.5	9.6
Interest expense		0.1			0.2
Spectra Energy [Member]
Transportation, processing and other		0.2			0.2
Purchases of natural gas, propane and NGLs from affiliates	46.5	2.3		131.7	76.4
Other income		3.0			3.0
ConocoPhillips [Member]
Sales of natural gas, propane, NGLs and condensate to affiliates	8.9	2.9		10.0	4.3
Transportation, processing and other	1.8	2.0		3.7	3.9
Purchases of natural gas, propane and NGLs from affiliates	2.1	1.6		3.5	3.6
General and administrative expense	0.1			0.2	0.1
Unconsolidated Affiliates [Member]
Purchases of natural gas, propane and NGLs from affiliates				$ 3.1	$ 2.4

[1] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Supplementary Information - Condensed Consolidating Financial Information

6 Months Ended

Jun. 30, 2011

Supplementary Information - Condensed Consolidating Financial Information

Supplementary Information - Condensed Consolidating Financial Information

18. Supplementary Information — Condensed Consolidating Financial Information

The following condensed consolidating financial information presents the results of operations, financial position and cash flows of DCP Midstream Partners, LP, or parent guarantor, DCP Midstream Operating LP, or subsidiary issuer, which is a 100% owned subsidiary, and non-guarantor subsidiaries, as well as the consolidating adjustments necessary to present DCP Midstream Partners, LP's results on a consolidated basis. In conjunction with the universal shelf registration statement on Form S-3 filed with the SEC on May 26, 2010, the parent guarantor has agreed to fully and unconditionally guarantee securities of the subsidiary issuer. For the purpose of the following financial information, investments in subsidiaries are reflected in accordance with the equity method of accounting. The financial information may not necessarily be indicative of results of operations, cash flows, or financial position had the subsidiaries operated as independent entities.

	Condensed Consolidating Balance Sheets June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	1.5		$	1.9		$	(1.0	)	$	2.4
Accounts receivable		—		—			140.6			—			140.6
Inventories		—		—			42.4			—			42.4
Other		—		0.2			2.7			—			2.9
Total current assets		—		1.7			187.6			(1.0	)		188.3
Property, plant and equipment, net		—		—			1,115.3			—			1,115.3
Goodwill and intangible assets, net		—		—			263.9			—			263.9
Advances receivable — consolidated subsidiaries		409.3		582.7			—			(992.0	)		—
Investments in consolidated subsidiaries		190.8		339.7			—			(530.5	)		—
Investments in unconsolidated affiliates		—		—			218.5			—			218.5
Other long-term assets		—		1.8			7.2			—			9.0
Total assets	$	600.1	$	925.9		$	1,792.5		$	(1,523.5	)	$	1,795.0
LIABILITIES AND EQUITY
Accounts payable and other current liabilities	$	—	$	480.8		$	173.8		$	(1.0	)	$	653.6
Advances payable — consolidated subsidiaries		—		—			992.0			(992.0	)		—
Long-term debt		—		249.8			—			—			249.8
Other long-term liabilities		—		4.5			63.9			—			68.4
Total liabilities		—		735.1			1,229.7			(993.0	)		971.8
Commitments and contingent liabilities
Equity:
Partners' equity
Net equity		600.1		212.1			340.9			(530.5	)		622.6
Accumulated other comprehensive loss		—		(21.3	)		(1.2	)		—			(22.5	)
Total partners' equity		600.1		190.8			339.7			(530.5	)		600.1
Noncontrolling interests		—		—			223.1			—			223.1
Total equity		600.1		190.8			562.8			(530.5	)		823.2
Total liabilities and equity	$	600.1	$	925.9		$	1,792.5		$	(1,523.5	)	$	1,795.0

	Condensed Consolidating Balance Sheets December 31, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	1.5		$	6.7		$	(1.5	)	$	6.7
Accounts receivable		—		—			151.0			—			151.0
Inventories		—		—			64.1			—			64.1
Other		—		—			10.2			—			10.2
Total current assets		—		1.5			232.0			(1.5	)		232.0
Property, plant and equipment, net		—		—			1,097.1			—			1,097.1
Goodwill and intangible assets, net		—		—			258.6			—			258.6
Advances receivable — consolidated subsidiaries		333.4		534.7			—			(868.1	)		—
Investments in consolidated subsidiaries		297.5		436.2			—			(733.7	)		—
Investments in unconsolidated affiliates		—		—			216.9			—			216.9
Other long-term assets		—		2.3			6.3			—			8.6
Total assets	$	630.9	$	974.7		$	1,810.9		$	(1,603.3	)	$	1,813.2
LIABILITIES AND EQUITY
Accounts payable and other current liabilities	$	0.2	$	19.5		$	193.0		$	(1.5	)	$	211.2
Advances payable — consolidated subsidiaries		—		—			868.1			(868.1	)		—
Long-term debt		—		647.8			—			—			647.8
Other long-term liabilities		—		9.9			93.5			—			103.4
Total liabilities		0.2		677.2			1,154.6			(869.6	)		962.4
Commitments and contingent liabilities
Equity:
Partners' equity
Predecessor equity		—		—			112.6			—			112.6
Net equity		630.7		324.9			323.9			(733.7	)		545.8
Accumulated other comprehensive loss		—		(27.4	)		(0.3	)		—			(27.7	)
Total partners' equity		630.7		297.5			436.2			(733.7	)		630.7
Noncontrolling interests		—		—			220.1			—			220.1
Total equity		630.7		297.5			656.3			(733.7	)		850.8
Total liabilities and equity	$	630.9	$	974.7		$	1,810.9		$	(1,603.3	)	$	1,813.2

(a) The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

	Condensed Consolidating Statements of Operations Three Months Ended June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	323.1		$	—		$	323.1
Transportation, processing and other		—		—			38.5			—			38.5
Gains from commodity derivative activity, net		—		—			12.6			—			12.6
Total operating revenues		—		—			374.2			—			374.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			274.3			—			274.3
Operating and maintenance expense		—		—			21.7			—			21.7
Depreciation and amortization expense		—		—			20.1			—			20.1
General and administrative expense		—		—			8.6			—			8.6
Other income		—		—			(0.1	)		—			(0.1	)
Total operating costs and expenses		—		—			324.6			—			324.6
Operating income (loss)		—		—			49.6			—			49.6
Interest expense, net		—		(8.4	)		—			—			(8.4	)
Income from consolidated subsidiaries		41.5		49.9			—			(91.4	)		—
Earnings from unconsolidated affiliates		—		—			10.0			—			10.0
Income before income taxes		41.5		41.5			59.6			(91.4	)		51.2
Income tax expense		—		—			—			—			—
Net income (loss)		41.5		41.5			59.6			(91.4	)		51.2
Net income attributable to noncontrolling interests		—		—			(9.7	)		—			(9.7	)
Net income (loss) attributable to partners	$	41.5	$	41.5		$	49.9		$	(91.4	)	$	41.5

	Condensed Consolidating Statements of Operations Three Months Ended June 30, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	228.0		$	—		$	228.0
Transportation, processing and other		—		—			27.0			—			27.0
Gains from commodity derivative activity, net		—		—			22.5			—			22.5
Total operating revenues		—		—			277.5			—			277.5
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			205.7			—			205.7
Operating and maintenance expense		—		—			20.6			—			20.6
Depreciation and amortization expense		—		—			18.7			—			18.7
General and administrative expense		—		—			8.2			—			8.2
Other income		—		—			(0.5	)		—			(0.5	)
Other income — affiliates		—		—			(3.0	)		—			(3.0	)
Total operating costs and expenses		—		—			249.7			—			249.7
Operating income		—		—			27.8			—			27.8
Interest expense, net		—		(7.3	)		—			—			(7.3	)
Earnings from consolidated subsidiaries		25.8		33.1			—			(58.9	)		—
Earnings from unconsolidated affiliates		—		—			6.4			—			6.4
Income before income taxes		25.8		25.8			34.2			(58.9	)		26.9
Income tax expense		—		—			(0.1	)		—			(0.1	)
Net income (loss)		25.8		25.8			34.1			(58.9	)		26.8
Net income attributable to noncontrolling interests		—		—			(1.0	)		—			(1.0	)
Net income (loss) attributable to partners	$	25.8	$	25.8		$	33.1		$	(58.9	)	$	25.8

(a) The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

	Condensed Consolidating Statements of Operations Six Months Ended June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	752.8		$	—		$	752.8
Transportation, processing and other		—		—			74.1			—			74.1
Losses from commodity derivative activity, net		—		—			(27.6	)		—			(27.6	)
Total operating revenues		—		—			799.3			—			799.3
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			649.3			—			649.3
Operating and maintenance expense		—		—			45.8			—			45.8
Depreciation and amortization expense		—		—			40.0			—			40.0
General and administrative expense		—		—			17.6			—			17.6
Other income		—		—			(0.2	)		—			(0.2	)
Total operating costs and expenses		—		—			752.5			—			752.5
Operating income		—		—			46.8			—			46.8
Interest expense, net		—		(16.4	)		—			—			(16.4	)
Earnings from consolidated subsidiaries		35.6		52.0			—			(87.6	)		—
Earnings from unconsolidated affiliates		—		—			18.6			—			18.6
Income before income taxes		35.6		35.6			65.4			(87.6	)		49.0
Income tax expense		—		—			(0.2	)		—			(0.2	)
Net income (loss)		35.6		35.6			65.2			(87.6	)		48.8
Net income attributable to noncontrolling interests		—		—			(13.2	)		—			(13.2	)
Net income (loss) attributable to partners	$	35.6	$	35.6		$	52.0		$	(87.6	)	$	35.6

	Condensed Consolidating Statements of Operations Six Months Ended June 30, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	598.4		$	—		$	598.4
Transportation, processing and other		—		—			54.3			—			54.3
Gains from commodity derivative activity, net		—		—			28.5			—			28.5
Total operating revenues		—		—			681.2			—			681.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			538.5			—			538.5
Operating and maintenance expense		—		—			39.6			—			39.6
Depreciation and amortization expense		—		—			36.5			—			36.5
General and administrative expense		—		—			16.8			—			16.8
Other income		—		—			(0.5	)		—			(0.5	)
Other income — affiliates		—		—			(3.0	)		—			(3.0	)
Total operating costs and expenses		—		—			627.9			—			627.9
Operating income		—		—			53.3			—			53.3
Interest expense, net		—		(14.4	)		(0.1	)		—			(14.5	)
Earnings from consolidated subsidiaries		58.1		72.5			—			(130.6	)		—
Earnings from unconsolidated affiliates		—		—			20.8			—			20.8
Income before income taxes		58.1		58.1			74.0			(130.6	)		59.6
Income tax expense		—		—			(0.4	)		—			(0.4	)
Net income (loss)		58.1		58.1			73.6			(130.6	)		59.2
Net income attributable to noncontrolling interests		—		—			(1.1	)		—			(1.1	)
Net income (loss) attributable to partners	$	58.1	$	58.1		$	72.5		$	(130.6	)	$	58.1

(a) The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

	Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2011
	Parent Guarantor			Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(76.0	)	$	(62.9	)	$	227.0		$	0.5		$	88.6
INVESTING ACTIVITIES:
Capital expenditures		—			—			(29.2	)		—			(29.2	)
Acquisitions, net of cash acquired		—			—			(151.4	)		—			(151.4	)
Investments in unconsolidated affiliates		—			—			(7.1	)		—			(7.1	)
Return of investment from unconsolidated affiliate		—			—			1.6			—			1.6
Proceeds from sale of assets		—			—			0.2			—			0.2
Net cash used in investing activities		—			—			(185.9	)		—			(185.9	)
FINANCING ACTIVITIES:
Proceeds from debt		—			716.0			—			—			716.0
Payments of debt		—			(653.0	)		—			—			(653.0	)
Payment of deferred financing costs		—			(0.1	)		—			—			(0.1	)
Proceeds from issuance of common units, net of offering costs		139.4			—			—			—			139.4
Excess purchase price over acquired assets		—			—			(35.7	)		—			(35.7	)
Distributions to unitholders and general partner		(63.4	)		—			—			—			(63.4	)
Distributions to noncontrolling interests		—			—			(15.8	)		—			(15.8	)
Contributions from noncontrolling interests		—			—			5.6			—			5.6
Net cash provided by (used in) financing activities		76.0			62.9			(45.9	)		—			93.0
Net change in cash and cash equivalents		—			—			(4.8	)		0.5			(4.3	)
Cash and cash equivalents, beginning of period		—			1.5			6.7			(1.5	)		6.7
Cash and cash equivalents, end of period	$	—		$	1.5		$	1.9		$	(1.0	)	$	2.4

	Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2010 (a)
	Parent Guarantor			Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	$	49.1		$	(12.0	)	$	53.5		$	(0.9	)	$	89.7
INVESTING ACTIVITIES:
Capital expenditures		—			—			(25.4	)		—			(25.4	)
Acquisitions, net of cash acquired		—			—			(22.0	)		—			(22.0	)
Investments in unconsolidated affiliates		—			—			(27.0	)		—			(27.0	)
Proceeds from sale of assets		—			—			1.7			—			1.7
Proceeds from sales of available-for-sale securities		—			10.1			—			—			10.1
Net cash provided by (used in) investing activities		—			10.1			(72.7	)		—			(62.6	)
FINANCING ACTIVITIES:
Proceeds from debt		—			210.6			—			—			210.6
Payments of debt		—			(208.6	)		—			—			(208.6	)
Distributions to unitholders and general partner		(49.1	)		—			—			—			(49.1	)
Distributions to noncontrolling interests		—			—			(8.2	)		—			(8.2	)
Contributions from noncontrolling interests		—			—			9.1			—			9.1
Net change in advances to predecessor from DCP Midstream LLC		—			—			25.3			—			25.3
Purchase of additional interest in a subsidiary		—			—			(3.5	)		—			(3.5	)
Net cash provided by (used in) financing activities		(49.1	)		2.0			22.7			—			(24.4	)
Net change in cash and cash equivalents		—			0.1			3.5			(0.9	)		2.7
Cash and cash equivalents, beginning of period		—			1.6			1.3			(0.8	)		2.1
Cash and cash equivalents, end of period	$	—		$	1.7		$	4.8		$	(1.7	)	$	4.8

(a) The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Agreements and Transactions with Affiliates (Schedule of Fees Incurred and Other Fees Paid) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Omnibus Agreement	$ 2.5	$ 2.4	$ 5.0	$ 4.9
Other fees - DCP Midstream, LLC	2.3	2.4	4.5	4.7
Total - DCP Midstream, LLC	(4.9)	(4.8)	(9.7)	(9.7)
DCP Midstream, LLC [Member]
Total - DCP Midstream, LLC	$ 4.8	$ 4.8	$ 9.5	$ 9.6

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Net Income Or Loss Per Limited Partner Unit (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net Income Or Loss Per Limited Partner Unit
Dilutive effect of unit based awards, equivalent units	75,560	0	55,105	0

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Agreements and Transactions with Affiliates

6 Months Ended

Jun. 30, 2011

Agreements and Transactions with Affiliates

Agreements and Transactions with Affiliates

4. Agreements and Transactions with Affiliates

DCP Midstream, LLC

Omnibus Agreement and Other General and Administrative Charges

We have entered into an omnibus agreement, as amended, or the Omnibus Agreement, with DCP Midstream, LLC. In January 2011, we extended the omnibus agreement through December 31, 2011 for an annual amount of $10.2 million.

Following is a summary of the fees we incurred under the Omnibus Agreement as well as other fees paid to DCP Midstream, LLC:

	Three Months Ended June  30,				Six Months Ended June  30,
	2011		2010		2011		2010
	(Millions)
Omnibus Agreement	$	2.5	$	2.4	$	5.0	$	4.9
Other fees — DCP Midstream, LLC		2.3		2.4		4.5		4.7
Total — DCP Midstream, LLC	$	4.8	$	4.8	$	9.5	$	9.6

Under the Omnibus Agreement, we are required to reimburse DCP Midstream, LLC for salaries of operating personnel and employee benefits as well as capital expenditures, maintenance and repair costs, taxes and other direct costs incurred by DCP Midstream, LLC on our behalf. We also pay DCP Midstream, LLC for certain costs incurred and centralized corporate functions performed by DCP Midstream, LLC on our behalf, including legal, accounting, cash management, insurance administration and claims processing, risk management, health, safety and environmental, information technology, human resources, credit, payroll, taxes and engineering. The Omnibus Agreement also addresses the following matters:

• DCP Midstream, LLC's obligation to indemnify us for certain liabilities and our obligation to indemnify DCP Midstream, LLC for certain liabilities; and

• DCP Midstream, LLC's obligation to continue to maintain its credit support, including without limitation guarantees and letters of credit, for our obligations related to commercial contracts with respect to its business or operations that were in effect at the closing of our initial public offering until the expiration of such contracts.

Any or all of the provisions of the Omnibus Agreement, other than the indemnification provisions, will be terminable by DCP Midstream, LLC at its option if the general partner is removed without cause and units held by the general partner and its affiliates are not voted in favor of that removal. The Omnibus Agreement will also terminate in the event of a change of control of us, the general partner (DCP Midstream GP, LP) or the General Partner (DCP Midstream GP, LLC).

East Texas incurs general and administrative expenses directly from DCP Midstream, LLC. East Texas incurred $1.9 million and $1.9 million for the three months ended June 30, 2011 and 2010, respectively, and $3.8 million and $3.9 million for the six months ended June 30, 2011 and 2010, respectively, for general and administrative expenses from DCP Midstream, LLC.

In addition to the Omnibus Agreement and amounts incurred by East Texas, we incurred other general and administrative fees with DCP Midstream, LLC of $0.4 million and $0.5 million for the three months ended June 30, 2011 and 2010, respectively, and $0.7 million and $0.8 million for the six months ended June 30, 2011 and 2010, respectively. These amounts include allocated expenses, including professional services, insurance and internal audit.

Other Agreements and Transactions with DCP Midstream, LLC

DCP Midstream, LLC was a significant customer during the three and six months ended June 30, 2011 and 2010.

We sell a portion of our residue gas, NGLs and condensate to, purchase natural gas and other petroleum products from, and provide gathering and transportation services for, DCP Midstream, LLC. We anticipate continuing to purchase from and sell commodities to DCP Midstream, LLC in the ordinary course of business. In addition, DCP Midstream, LLC conducts derivative activities on our behalf.

We have a contractual arrangement with DCP Midstream, LLC, through March 2022, in which we pay DCP Midstream, LLC a fee for processing services associated with the gas we gather on our Southern Oklahoma system, which is part of our Natural Gas Services segment. In addition, in February 2010, a contract was signed with DCP Midstream, LLC providing for adjustments to those fees based upon plant efficiencies related to our portion of volumes from the Southern Oklahoma system being processed at DCP Midstream, LLC's plant through March 2022. We generally report fees associated with these activities in the condensed consolidated statements of operations as purchases of natural gas, propane, NGLs and condensate from affiliates. In addition, as part of this arrangement, DCP Midstream, LLC pays us a fee for certain gathering services. We generally report revenues associated with these activities in the condensed consolidated statements of operations as transportation, processing and other to affiliates.

DCP Midstream, LLC owns certain assets and is party to certain contractual relationships around our Pelico system, included in our Northern Louisiana system, which is part of our Natural Gas Services segment, that are periodically used for the benefit of Pelico. DCP Midstream, LLC is able to source natural gas upstream of Pelico and deliver it to us and is able to take natural gas from the outlet of the Pelico system and market it downstream of Pelico. We purchase natural gas from DCP Midstream, LLC upstream of Pelico and transport it to Pelico under a firm transportation agreement with an affiliate. Our purchases from DCP Midstream, LLC are at DCP Midstream, LLC's actual acquisition cost plus any transportation service charges. Volumes that exceed our on-system demand are sold to DCP Midstream, LLC at an index-based price, less contractually agreed to marketing fees. Revenues associated with these activities are reported gross in our condensed consolidated statements of operations as sales of natural gas, propane, NGLs and condensate to affiliates.

In conjunction with our acquisition of a 33.33% interest in Southeast Texas from DCP Midstream, LLC for $150.0 million in our Natural Gas Services segment, we entered into a joint venture agreement. The terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interests in Southeast Texas. This transaction closed on January 1, 2011.

In conjunction with our acquisition of a 50.1% limited liability company interest in East Texas, which is part of our Natural Gas Services segment, we entered into agreements with DCP Midstream, LLC whereby DCP Midstream, LLC will reimburse East Texas for certain expenditures on East Texas capital projects. These reimbursements are for certain capital projects which have commenced within three years from the respective acquisition dates. DCP Midstream, LLC made capital contributions to East Texas for capital projects of $2.7 million and $5.3 million for the three months ended June 30, 2011 and 2010, respectively, and $5.6 million and $9.1 million for the six months ended June 30, 2011 and 2010, respectively.

On September 16, 2010, we entered into an agreement with DCP Midstream, LLC to sell certain surplus equipment at Collbran, part of our Natural Gas Services segment, with a net book value of $6.2 million for net proceeds of $3.6 million. The surplus equipment is the result of a consolidation of operations at our Anderson Gulch plant in the Piceance Basin. The net proceeds of $3.6 million were distributed 75% to us and 25% to the noncontrolling interest in Collbran, based upon proportionate ownership, during the year ended December 31, 2010. The sale was completed when title to the surplus equipment passed to DCP Midstream, LLC in March 2011. We have recognized a distribution of $2.6 million for the six months ended June 30, 2011 to DCP Midstream, LLC in our condensed consolidated statements of changes in equity representing the difference between the net book value and the proceeds received for the surplus equipment.

In June 2011, East Texas reached a $7.0 million settlement with the responsible third party, related to the first quarter 2009 fire that was caused by a third party underground pipeline rupture outside of our property, or the East Texas recovery settlement. We have allocated the settlement based upon relative ownership percentages at the time the losses were incurred, factoring in amounts previously reimbursed to us by DCP Midstream, LLC. Under the agreement, DCP Midstream, LLC will retain $1.2 million of the proceeds for reimbursement of amounts previously paid to us, and we recognized $1.6 million of the remaining $5.8 million in "net income". We have recorded a $1.2 million payable to DCP Midstream, LLC in "other current liabilities" in our condensed consolidated balance sheet and $5.8 million to our condensed consolidated statement of operations in "sales of natural gas, propane, NGLs and condensate", with $4.2 million representing DCP Midstream, LLC's portion in "net income attributable to noncontrolling interests", for the three and six months ended June 30, 2011. We expect to receive cash related to the settlement in the second half of 2011.

In our Natural Gas Services segment, we sell NGLs processed at certain of our plants, and sell condensate removed from the gas gathering systems that deliver to certain of our systems under contracts to a subsidiary of DCP Midstream, LLC equal to that subsidiary's net weighted-average sales price, adjusted for transportation, processing and other charges from the tailgate of the respective asset.

In our NGL Logistics segment, we also have a contractual arrangement with a subsidiary of DCP Midstream, LLC that provides that DCP Midstream, LLC will pay us to transport NGLs over our Seabreeze and Wilbreeze pipelines, pursuant to fee-based rates that will be applied to the volumes transported. DCP Midstream, LLC is the sole shipper on these pipelines under the transportation agreements. We generally report revenues associated with these activities in the condensed consolidated statements of operations as transportation, processing and other to affiliates.

In conjunction with our acquisition of the Wattenberg pipeline, which is part of our NGL Logistics segment, we signed a transportation agreement with DCP Midstream, LLC pursuant to fee-based rates that will be applied to the volumes transported, which was effective through December 31, 2010. Effective January 1, 2011, we entered into a 10-year dedication and transportation agreement with a subsidiary of DCP Midstream, LLC whereby certain NGL volumes produced at several of DCP Midstream, LLC's processing facilities are dedicated for transportation on the Wattenberg pipeline. We collect fee-based transportation revenues under our tariff. We generally report revenues associated with these activities in the condensed consolidated statements of operations as transportation, processing and other to affiliates.

In conjunction with our acquisition of our DJ Basin NGL Fractionators in our NGL Logistics segment, we pay a fee to DCP Midstream, LLC to operate our DJ Basin NGL Fractionators and receive fees for the processing of DCP Midstream, LLC's committed NGLs produced by them in Weld County at our DJ Basin NGL Fractionators under agreements that are effective through March 2018.

DCP Midstream, LLC has issued parental guarantees, totaling $95.0 million as of June 30, 2011, in favor of certain counterparties to our commodity derivative instruments to mitigate a portion of our collateral requirements with those counterparties. We pay DCP Midstream, LLC interest of 0.5% per annum on these outstanding guarantees.

DCP Midstream, LLC has issued parental guarantees for its 49.9% limited liability company interest in East Texas, totaling $6.0 million as of June 30, 2011, in favor of certain counterparties to processing and transportation agreements at East Texas. Concurrently, we issued similar guarantees for our 50.1% interest.

Spectra Energy

We have propane supply agreements with Spectra Energy, effective through April 2012, which provide us propane supply at our marine terminals, which are included in our Wholesale Propane Logistics segment, for up to approximately 185 million gallons of propane annually. Additionally, we have transportation agreements with Spectra Energy, effective through January 2012, which provide natural gas transportation to our Pelico system in our Natural Gas Services segment, for approximately 35 MMcf/d.

ConocoPhillips

We have multiple agreements with ConocoPhillips and its affiliates. The agreements include fee-based and percent-of-proceeds gathering and processing arrangements, and gas purchase and gas sales agreements. We anticipate continuing to purchase from and sell to ConocoPhillips and its affiliates in the ordinary course of business. In addition, we may be reimbursed by ConocoPhillips for certain capital projects where the work is performed by us. We received $0.2 million of capital reimbursements during the three and six months ended June 30, 2010 and did not receive any capital reimbursements during the three and six months ended June 30, 2011.

Summary of Transactions with Affiliates

The following table summarizes transactions with affiliates:

	Three Months Ended June  30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
DCP Midstream, LLC:
Sales of natural gas, propane, NGLs and condensate	$	158.9		$	131.9		$	290.0		$	265.5
Transportation, processing and other	$	6.3		$	2.7		$	9.5		$	6.5
Purchases of natural gas, propane and NGLs	$	35.5		$	23.7		$	98.5		$	86.5
Losses from commodity derivative activity, net	$	(0.6	)	$	(0.3	)	$	(1.9	)	$	(0.3	)
General and administrative expense	$	4.8		$	4.8		$	9.5		$	9.6
Interest expense	$	—		$	0.1		$	—		$	0.2
Spectra Energy:
Transportation, processing and other	$	—		$	0.2		$	—		$	0.2
Purchases of natural gas, propane and NGLs	$	46.5		$	2.3		$	131.7		$	76.4
Other income	$	—		$	3.0		$	—		$	3.0
ConocoPhillips:
Sales of natural gas, propane, NGLs and condensate	$	8.9		$	2.9		$	10.0		$	4.3
Transportation, processing and other	$	1.8		$	2.0		$	3.7		$	3.9
Purchases of natural gas, propane and NGLs	$	2.1		$	1.6		$	3.5		$	3.6
General and administrative expense	$	0.1		$	—		$	0.2		$	0.1
Unconsolidated affiliates:
Purchases of natural gas, propane and NGLs	$	—		$	—		$	3.1		$	2.4

We had balances with affiliates as follows:

	June 30, 2011			December 31, 2010
	(Millions)
DCP Midstream, LLC:
Accounts receivable	$	70.3		$	60.1
Accounts payable	$	26.4		$	27.0
Unrealized gains on derivative instruments — current	$	0.1		$	1.3
Unrealized losses on derivative instruments — current	$	(1.6	)	$	(1.8	)
Spectra Energy:
Accounts payable	$	2.3		$	8.7
ConocoPhillips:
Accounts receivable	$	3.9		$	1.6
Accounts payable	$	0.5		$	1.0
Unconsolidated affiliates:
Accounts payable	$	—		$	0.9

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Subsequent Events

6 Months Ended

Jun. 30, 2011

Subsequent Events

Subsequent Events

19. Subsequent Events

On July 26, 2011, the board of directors of the General Partner declared a quarterly distribution of $0.6325 per unit, payable on August 12, 2011 to unitholders of record on August 5, 2011.

On August 1, 2011, we reached an agreement with DCP Midstream, LLC for us to construct a 200 MMcf/d cryogenic natural gas processing plant in the Eagle Ford shale or, the Eagle Plant, which represents an approximate $120 million investment. In support of our construction of the Eagle Plant, we entered into a 15 year fee-based processing agreement with an affiliate of DCP Midstream, LLC, which provides us with a fixed demand charge for 150 MMcf/d along with a throughput fee on all volumes processed. The processing agreement commences with commercial operations of the new plant, which is expected to be online by the fourth quarter of 2012. In conjunction with the agreement, we also entered into a purchase and sale agreement with DCP Midstream, LLC to purchase certain tangible assets and land located in the Eagle Ford Shale for approximately $25.0 million.

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Acquisitions (Preliminary Purchase Price Allocation) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 30, 2010 Marysville [Member]
Aggregate consideration	$ 100.8
Cash	3.1
Accounts receivable	0.7
Inventory	4.6
Other current assets	0.7
Property, plant and equipment	57.1
Intangible assets	33.0
Goodwill	39.7
Other long-term assets	1.2
Other current liabilities	(4.3)
Long-term liabilities	(35.0)
Total preliminary purchase price allocation	$ 100.8	$ 100.8

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Business Segments (Tables)

6 Months Ended

Jun. 30, 2011

Business Segments

Segment Information

	Three Months Ended June 30, 2011
	Natural  Gas Services			Wholesale Propane Logistics			NGL Logistics			Other			Eliminations (f)		Total
	(Millions)
Total operating revenue	$	257.4		$	104.3		$	12.5		$	—		$	—	$	374.2
Total purchases		(176.3	)		(98.0	)		—			—			—		(274.3	)
Gross margin (a)	$	81.1		$	6.3		$	12.5		$	—		$	—	$	99.9
Operating and maintenance expense		(15.9	)		(4.3	)		(1.5	)		—			—		(21.7	)
Depreciation and amortization expense		(17.4	)		(0.7	)		(2.0	)		—			—		(20.1	)
General and administrative expense		—			—			—			(8.6	)		—		(8.6	)
Other income		—			—			0.1			—			—		0.1
Earnings from unconsolidated affiliates		10.0			—			—			—			—		10.0
Interest expense		—			—			—			(8.4	)		—		(8.4	)
Income tax expense (b)		—			—			—			—			—		—
Net income (loss)		57.8			1.3			9.1			(17.0	)		—		51.2
Net income attributable to noncontrolling interests		(9.7	)		—			—			—			—		(9.7	)
Net income (loss) attributable to partners	$	48.1		$	1.3		$	9.1		$	(17.0	)	$	—	$	41.5
Non-cash derivative mark-to-market (c)	$	22.3		$	(0.5	)	$	—		$	(0.8	)	$	—	$	21.0
Capital expenditures	$	12.6		$	0.9		$	2.0		$	—		$	—	$	15.5

	Three Months Ended June 30, 2010
	Natural Gas Services (e)			Wholesale Propane Logistics			NGL Logistics			Other			Total
	(Millions)
Total operating revenue	$	211.7		$	62.2		$	3.6		$	—		$	277.5
Total purchases		(141.5	)		(63.1	)		(1.1	)		—			(205.7	)
Gross margin (a)	$	70.2		$	(0.9	)	$	2.5		$	—		$	71.8
Operating and maintenance expense		(17.0	)		(2.6	)		(1.0	)		—			(20.6	)
Depreciation and amortization expense		(17.8	)		(0.3	)		(0.6	)		—			(18.7	)
General and administrative expense		—			—			—			(8.2	)		(8.2	)
Other income		0.5			3.0			—			—			3.5
Earnings from unconsolidated affiliates		6.1			—			0.3			—			6.4
Interest expense		—			—			—			(7.3	)		(7.3	)
Income tax expense (b)		—			—			—			(0.1	)		(0.1	)
Net income (loss)		42.0			(0.8	)		1.2			(15.6	)		26.8
Net income attributable to noncontrolling interests		(1.0	)		—			—			—			(1.0	)
Net income (loss) attributable to partners	$	41.0		$	(0.8	)	$	1.2		$	(15.6	)	$	25.8
Non-cash derivative mark-to-market (c)	$	22.3		$	—		$	—		$	0.2		$	22.5
Capital expenditures	$	11.2		$	—		$	2.0		$	—		$	13.2

	Six Months Ended June 30, 2011
	Natural  Gas Services			Wholesale Propane Logistics			NGL Logistics			Other			Eliminations (f)			Total
	(Millions)
Total operating revenue	$	421.9		$	352.1		$	27.5		$	—		$	(2.2	)	$	799.3
Total purchases		(322.8	)		(324.0	)		(4.7	)		—			2.2			(649.3	)
Gross margin (a)	$	99.1		$	28.1		$	22.8		$	—		$	—		$	150.0
Operating and maintenance expense		(32.4	)		(7.9	)		(5.5	)		—			—			(45.8	)
Depreciation and amortization expense		(34.9	)		(1.4	)		(3.7	)		—			—			(40.0	)
General and administrative expense		—			—			—			(17.6	)		—			(17.6	)
Other income		—			—			0.2			—			—			0.2
Earnings from unconsolidated affiliates		18.6			—			—			—			—			18.6
Interest expense		—			—			—			(16.4	)		—			(16.4	)
Income tax expense (b)		—			—			—			(0.2	)		—			(0.2	)
Net income (loss)		50.4			18.8			13.8			(34.2	)		—			48.8
Net income attributable to noncontrolling interests		(13.2	)		—			—			—			—			(13.2	)
Net income (loss) attributable to partners	$	37.2		$	18.8		$	13.8		$	(34.2	)	$	—		$	35.6
Non-cash derivative mark-to-market (c)	$	(11.1	)	$	(0.8	)	$	—		$	(1.0	)	$	—		$	(12.9	)
Capital expenditures	$	21.4		$	1.5		$	6.3		$	—		$	—		$	29.2
Acquisition expenditures	$	121.8		$	—		$	29.6		$	—		$	—		$	151.4

	Six Months Ended June 30, 2010
	Natural Gas Services (e)			Wholesale Propane Logistics			NGL Logistics			Other			Total
	(Millions)
Total operating revenue	$	429.8		$	243.0		$	8.4		$	—		$	681.2
Total purchases		(305.8	)		(230.2	)		(2.5	)		—			(538.5	)
Gross margin (a)	$	124.0		$	12.8		$	5.9		$	—		$	142.7
Operating and maintenance expense		(33.2	)		(5.2	)		(1.2	)		—			(39.6	)
Depreciation and amortization expense		(34.8	)		(0.6	)		(1.1	)		—			(36.5	)
General and administrative expense		—			—			—			(16.8	)		(16.8	)
Other income		0.5			3.0			—			—			3.5
Earnings from unconsolidated affiliates		20.0			—			0.8			—			20.8
Interest expense		—			—			—			(14.5	)		(14.5	)
Income tax expense (b)		—			—			—			(0.4	)		(0.4	)
Net income (loss)		76.5			10.0			4.4			(31.7	)		59.2
Net income attributable to noncontrolling interests		(1.1	)		—			—			—			(1.1	)
Net income (loss) attributable to partners	$	75.4		$	10.0		$	4.4		$	(31.7	)	$	58.1
Non-cash derivative mark-to-market (c)	$	30.7		$	(0.6	)	$	—		$	0.2		$	30.3
Capital expenditures	$	23.3		$	—		$	2.1		$	—		$	25.4
Acquisitions, net of cash acquired	$	—		$	—		$	22.0		$	—		$	22.0
Investments in unconsolidated affiliates	$	0.7		$	—		$	—		$	—		$	0.7

	June 30, 2011		December 31, 2010
	(Millions)
Segment long-term assets:
Natural Gas Services (e)	$	1,247.2	$	1,253.7
Wholesale Propane Logistics		102.3		101.7
NGL Logistics		252.5		221.7
Other (d)		4.7		4.1
Total long-term assets		1,606.7		1,581.2
Current assets		188.3		232.0
Total assets	$	1,795.0	$	1,813.2

(a) Gross margin consists of total operating revenues, including commodity derivative activity, less purchases of natural gas, propane, NGLs and condensate. Gross margin is viewed as a non-GAAP measure under the rules of the SEC, but is included as a supplemental disclosure because it is a primary performance measure used by management as it represents the results of product sales versus product purchases. As an indicator of our operating performance, gross margin should not be considered an alternative to, or more meaningful than, net income or cash flow as determined in accordance with GAAP. Our gross margin may not be comparable to a similarly titled measure of another company because other entities may not calculate gross margin in the same manner.

(b) Income tax expense relates primarily to the Texas margin tax and the Michigan business tax.

(c) Non-cash derivative mark-to-market is included in segment gross margin, along with cash settlements for our derivative contracts.

(d) Other long-term assets not allocable to segments consist of unrealized gains on derivative instruments, corporate leasehold improvements and other long-term assets.

(e) The segment information for the three and six months ended June 30, 2010 and as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

(f) Represents intersegment revenues consisting of sales of NGLs by Marysville in our NGL Logistics business to our Wholesale Propane business.

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Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2011

Supplemental Cash Flow Information

Supplemental Cash Flow Information

17. Supplemental Cash Flow Information

	Six Months Ended June 30,
	2011		2010
	(Millions)
Cash paid for interest:
Cash paid for interest, net of amounts capitalized	$	2.2	$	3.2
Cash paid for income taxes, net of income tax refunds	$	29.9	$	0.5
Non-cash investing and financing activities:
Property, plant and equipment acquired with accounts payable	$	3.0	$	3.2
Other non-cash additions of property, plant and equipment	$	0.1	$	0.2
Acquisition related contingent consideration	$	—	$	1.0
Non-cash change in parent advances	$	1.7	$	—
Non-cash distributions to DCP Midstream, LLC	$	2.6	$	—

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Debt

6 Months Ended

Jun. 30, 2011

Debt

Debt

9. Debt

Long-term debt was as follows:

	June 30, 2011			December 31, 2010
	(Millions)
Credit Facility
Revolving credit facility, weighted-average variable interest rate of 0.67% and 1.14%, respectively, and net effective interest rate of 4.31% and 4.28%, respectively, due June 21, 2012 (a)	$	461.0		$	398.0
Debt Securities
Issued September 30, 2010, interest at 3.25% payable semi-annually, due October 1, 2015		250.0			250.0
Unamortized discount		(0.2	)		(0.2	)
Total debt	$	710.8		$	647.8
Current maturities		(461.0	)		—
Total long-term debt		249.8			647.8

(a) $450.0 million of debt has been swapped to a fixed rate obligation with effective fixed rates ranging from 2.94% to 5.19%, for a net effective rate of 4.31% on the $461.0 million of outstanding debt under our revolving credit facility as of June 30, 2011.

Credit Agreement

We have an $850.0 million revolving credit facility that matures June 21, 2012, or the Credit Agreement.

As of June 30, 2011 and December 31, 2010, we had $1.1 million and $32.1 million, respectively, of letters of credit issued under the Credit Agreement. As of June 30, 2011, the unused capacity under the revolving credit facility was $387.9 million, of which approximately $367.0 million was available for general working capital purposes.

Our borrowing capacity is limited at June 30, 2011 by the Credit Agreement's financial covenant requirements. Except in the case of a default, amounts borrowed under our credit facility will not mature prior to the June 21, 2012 maturity date.

Under the Credit Agreement, indebtedness under the revolving credit facility bears interest at either: (1) the higher of Wells Fargo Bank's prime rate or the Federal Funds rate plus 0.50%; or (2) LIBOR plus an applicable margin, which ranges from 0.23% to 0.575% dependent upon our credit rating. The revolving credit facility incurs an annual facility fee of 0.07% to 0.175% depending on our credit rating. This fee is paid on drawn and undrawn portions of the revolving credit facility.

The Credit Agreement requires us to maintain a leverage ratio (the ratio of our consolidated indebtedness to our consolidated EBITDA, in each case as is defined by the Credit Agreement) of not more than 5.0 to 1.0, and on a temporary basis for not more than three consecutive quarters (including the quarter in which such acquisition is consummated) following the consummation of asset acquisitions in the midstream energy business of not more than 5.5 to 1.0.

Debt Securities

On September 30, 2010, we issued $250.0 million of 3.25% Senior Notes due October 1, 2015. We received proceeds of $247.7 million, which are net of underwriters' fees, related expenses and unamortized discounts of $1.5 million, $0.6 million and $0.2 million, respectively, which we used to repay funds borrowed under the revolver portion of our Credit Facility. Interest on the notes is paid semi-annually on April 1 and October 1 of each year, with the first payment made on April 1, 2011. The notes will mature on October 1, 2015, unless redeemed prior to maturity. The underwriters' fees and related expenses are deferred in other long-term assets in our condensed consolidated balance sheets and will be amortized over the term of the notes.

The notes are senior unsecured obligations, ranking equally in right of payment with other unsecured indebtedness, including indebtedness under our Credit Facility. We are not required to make mandatory redemption or sinking fund payments with respect to these notes. The securities are redeemable at a premium at our option.

The future maturities of long-term debt in the year indicated are as follows:

	Debt Maturities
	(Millions)
2012	$	—
2013		—
2014		—
2015		250.0
Thereafter		—
Unamortized discount		(0.2	)
Total	$	249.8

Other Agreements

As of June 30, 2011, we had a contingent letter of credit for up to $10.0 million, on which we pay a fee of 0.50% per annum. This facility reduces the amount of cash we may be required to post as collateral. As of June 30, 2011, we had no letters of credit issued on this facility. Any letters of credit issued on this facility will incur a fee of 1.75% per annum and will not reduce the available capacity under our credit facility.

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Condensed Consolidated Statements Of Changes in Equity (Parenthetical) (Common Unitholders [Member])	6 Months Ended
	Jun. 30, 2011
Common Unitholders [Member]
Issuance of units	3,596,636

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Debt (Tables)

6 Months Ended

Jun. 30, 2011

Debt

Debt

	June 30, 2011			December 31, 2010
	(Millions)
Credit Facility
Revolving credit facility, weighted-average variable interest rate of 0.67% and 1.14%, respectively, and net effective interest rate of 4.31% and 4.28%, respectively, due June 21, 2012 (a)	$	461.0		$	398.0
Debt Securities
Issued September 30, 2010, interest at 3.25% payable semi-annually, due October 1, 2015		250.0			250.0
Unamortized discount		(0.2	)		(0.2	)
Total debt	$	710.8		$	647.8
Current maturities		(461.0	)		—
Total long-term debt		249.8			647.8

(a) $450.0 million of debt has been swapped to a fixed rate obligation with effective fixed rates ranging from 2.94% to 5.19%, for a net effective rate of 4.31% on the $461.0 million of outstanding debt under our revolving credit facility as of June 30, 2011.

Future Maturities of Long-Term Debt

	Debt Maturities
	(Millions)
2012	$	—
2013		—
2014		—
2015		250.0
Thereafter		—
Unamortized discount		(0.2	)
Total	$	249.8

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Goodwill and Intangible Assets

6 Months Ended

Jun. 30, 2011

Goodwill and Intangible Assets

Goodwill and Intangible Assets

6. Goodwill and Intangible Assets

The change in the carrying amount of goodwill is as follows:

	June 30,		December 31,
	2011		2010
	(Millions)
Beginning of period	$	139.3	$	92.1
Acquisitions		7.6		47.2
End of period	$	146.9	$	139.3

The carrying value of goodwill as of June 30, 2011 and December 31, 2010 was $70.3 million and $62.8 million, respectively, for our Natural Gas Services segment, $36.9 million as of both periods for our Wholesale Propane Logistics segment, and $39.7 million as of both periods for our NGL logistics segment.

Goodwill increased in 2011 by $7.6 million primarily as a result of a purchase price adjustment related to a contingent payment in conjunction with our 2008 Michigan System acquisition.

Intangible assets consist of customer contracts, including commodity purchase, transportation and processing contracts, and related relationships. The gross carrying amount and accumulated amortization of these intangible assets are included in the accompanying consolidated balance sheets as intangible assets, net, and are as follows:

	June 30,			December 31,
	2011			2010
	(Millions)
Gross carrying amount	$	129.4		$	128.7
Accumulated amortization		(12.4	)		(9.4	)
Intangible assets, net	$	117.0		$	119.3

We recorded amortization expense of $1.5 million and $0.7 million for the three months ended June 30, 2011 and 2010, respectively, and $3.0 million and $1.5 million for the six months ended June 30, 2011 and 2010, respectively. As of June 30, 2011, the remaining amortization periods ranged from approximately 10 years to 24 years, with a weighted-average remaining period of approximately 20 years.

The weighted-average remaining amortization is 20 years for the $33.0 million of intangible assets acquired with our Marysville acquisition.

Estimated future amortization for these intangible assets is as follows:

Estimated Future Amortization
(Millions)
Remainder of 2011	$	3.1
2012		6.0
2013		6.0
2014		6.0
2015		6.0
Thereafter		89.9
Total	$	117.0

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Partnership Equity and Distributions

6 Months Ended

Jun. 30, 2011

Partnership Equity and Distributions

Partnership Equity and Distributions

11. Partnership Equity and Distributions

General — Our partnership agreement requires that, within 45 days after the end of each quarter, we distribute all of our Available Cash, as defined below, to unitholders of record on the applicable record date, as determined by our general partner.

In June 2011, we filed a shelf registration statement on Form S-3 with the SEC with a maximum aggregate offering amount of $150.0 million. The shelf registration statement will allow us to periodically register and issue partnership units which are intended to finance growth opportunities.

In March 2011, we issued 3,596,636 common limited partner units at $40.55 per unit. We received proceeds of $139.7 million, net of offering costs.

In February 2011, we issued 8,399 common limited partner units, from our long-term incentive plan, or LTIP, to employees as compensation for their service during 2010, 2009 and 2008.

In November 2010, we issued 2,875,000 common limited partner units at $34.96 per unit. We received proceeds of $96.2 million, net of offering costs.

In September 2010, we issued 5,200 common limited partner units, from our LTIP to non-employee directors as compensation for their service during 2010.

In August 2010, we issued 2,990,000 common limited partner units at $32.57 per unit. We received proceeds of $93.1 million, net of offering costs.

On May 26, 2010, we filed a universal shelf registration statement on Form S-3 with the SEC with a maximum aggregate offering amount of $1.5 billion, to replace an existing shelf registration statement. The universal shelf registration statement will allow us to register and issue additional partnership units and debt securities.

Definition of Available Cash — Available Cash, for any quarter, consists of all cash and cash equivalents on hand at the end of that quarter:

• less the amount of cash reserves established by the general partner to:

• provide for the proper conduct of our business;

• comply with applicable law, any of our debt instruments or other agreements; and

• provide funds for distributions to the unitholders and to our general partner for any one or more of the next four quarters;

• plus, if our general partner so determines, all or a portion of cash and cash equivalents on hand on the date of determination of Available Cash for the quarter.

General Partner Interest and Incentive Distribution Rights — The general partner is entitled to a percentage of all quarterly distributions equal to its general partner interest of approximately 1% and limited partner interest of 1% as of June 30, 2011. The general partner has the right, but not the obligation, to contribute a proportionate amount of capital to us to maintain its current general partner interest.

The incentive distribution rights held by the general partner entitle it to receive an increasing share of Available Cash when pre-defined distribution targets are achieved. Currently, our distribution to our general partner related to its incentive distribution rights is at the highest level. The general partner's incentive distribution rights were not reduced as a result of our common limited partner unit issuances, and will not be reduced if we issue additional units in the future and the general partner does not contribute a proportionate amount of capital to us to maintain its current general partner interest. Please read the Distributions of Available Cash after the Subordination Period sections below for more details about the distribution targets and their impact on the general partner's incentive distribution rights.

Distributions of Available Cash after the Subordination Period — Our partnership agreement, after adjustment for the general partner's relative ownership level, requires that we make distributions of Available Cash from operating surplus for any quarter after the subordination period, which ended in February 2009, in the following manner:

• first, to all unitholders and the general partner, in accordance with their pro rata interest, until each unitholder receives a total of $0.4025 per unit for that quarter;

• second, 13% to the general partner, plus the general partner's pro rata interest, and the remainder to all unitholders pro rata until each unitholder receives a total of $0.4375 per unit for that quarter;

• third, 23% to the general partner, plus the general partner's pro rata interest, and the remainder to all unitholders pro rata until each unitholder receives a total of $0.525 per unit for that quarter; and

• thereafter, 48% to the general partner, plus the general partner's pro rata interest, and the remainder to all unitholders.

The following table presents our cash distributions paid in 2011 and 2010:

Payment Date	Per Unit Distribution		Total Cash Distribution
			(Millions)
May 13, 2011	$	0.6250	$	33.4
February 14, 2011	$	0.6175	$	30.0
November 12, 2010	$	0.6100	$	27.4
August 13, 2010	$	0.6100	$	25.3
May 14, 2010	$	0.6000	$	24.6
February 12, 2010	$	0.6000	$	24.6

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Partnership Equity and Distributions (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2011 days	Mar. 31, 2011	Feb. 28, 2011	Dec. 31, 2010	Nov. 30, 2010	Sep. 30, 2010	Aug. 31, 2010	May 26, 2010
Deadline To Distribute Available Cash To Unitholders	45
Maximum aggregate offering price	$ 150.0							$ 1,500.0
Common unitholders, units issued	44,083,418	3,596,636	8,399	40,478,383	2,875,000	5,200	2,990,000
Common units per unit		$ 40.55			$ 34.96		$ 32.57
Limited Partners Capital Account Units Issued [Member]
Net offering costs		$ 139.7			$ 96.2		$ 93.1
Distribution Stage First [Member]
General Partner pro rata interest per unit	$ 0.4025
Distribution Stage Second [Member]
Pro rata interest	13.00%
General Partner pro rata interest per unit	$ 0.4375
Distribution Stage Third [Member]
Pro rata interest	23.00%
General Partner pro rata interest per unit	$ 0.525
Distribution Stage Thereafter [Member]
Pro rata interest	48.00%
General Partner [Member]
General partner ownership interest	1.00%
Limited partner ownership interest	1.00%

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Investments in Unconsolidated Affiliates

6 Months Ended

Jun. 30, 2011

Investments in Unconsolidated Affiliates

Equity Method Investments Disclosure

7. Investments in Unconsolidated Affiliates

The following table summarizes our investments in unconsolidated affiliates:

	Percentage of Ownership as of June 30, 2011 and December 31, 2010	Carrying Value as of
		June 30, 2011		December 31, 2010
		(Millions)
Discovery Producer Services LLC	40%	$	103.5	$	104.1
Southeast Texas	33%		114.8		112.6
Other	50%		0.2		0.2
Total investments in unconsolidated affiliates		$	218.5	$	216.9

There was a deficit between the carrying amount of the investment and the underlying equity of Discovery of $33.9 million and $35.1 million at June 30, 2011 and December 31, 2010, respectively, which is associated with, and is being accreted over, the life of the underlying long-lived assets of Discovery.

Earnings from investments in unconsolidated affiliates were as follows:

	Three Months Ended June  30,					Six Months Ended June  30,
	2011		2010 (a)			2011		2010 (a)
	(Millions)
Discovery Producer Services LLC	$	5.7	$	6.3		$	10.2	$	13.7
Southeast Texas		4.3		(0.2	)		8.4		6.3
Black Lake Pipe Line Company and other		—		0.3			—		0.8
Total earnings from unconsolidated affiliates	$	10.0	$	6.4		$	18.6	$	20.8

(a) As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

The following summarizes combined financial information of our investments in unconsolidated affiliates:

	Three Months Ended June  30,				Six Months Ended June  30,
	2011 (a)		2010 (b)		2011 (a)		2010 (b)
	(Millions)
Statements of operations:
Operating revenue	$	233.1	$	215.8	$	493.0	$	518.4
Operating expenses	$	210.9	$	201.6	$	451.0	$	466.3
Net income	$	22.1	$	14.2	$	41.7	$	52.2

(a) The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

(b) The combined financial information for the three and six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

	June 30, 2011 (a)			December 31, 2010 (a) (b)
	(Millions)
Balance sheets:
Current assets	$	112.6		$	153.0
Long-term assets		702.8			684.9
Current liabilities		(68.2	)		(121.4	)
Long-term liabilities		(30.3	)		(30.3	)
Net assets	$	716.9		$	686.2

(a) The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

(b) The combined financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2011 MMcf cf	Jul. 01, 2011
Quarterly distribution per unit	$ 0.6325
Business acquisition purchase price	$ 100.8
Eagle Ford Shale [Member]
Total plant capacity	200
Gas processing agreements capacity	150
Long-term Purchase Commitment, Time Period	15 year
Value of the plant	120
Business acquisition purchase price		$ 25.0

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Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2011

Goodwill and Intangible Assets

Changes in Carrying Amount of Goodwill

	June 30,		December 31,
	2011		2010
	(Millions)
Beginning of period	$	139.3	$	92.1
Acquisitions		7.6		47.2
End of period	$	146.9	$	139.3

Schedule Of Finite Lived Intangible Assets

	June 30,			December 31,
	2011			2010
	(Millions)
Gross carrying amount	$	129.4		$	128.7
Accumulated amortization		(12.4	)		(9.4	)
Intangible assets, net	$	117.0		$	119.3

Finite Lived Intangible Assets Future Amortization Expense

Estimated Future Amortization
(Millions)
Remainder of 2011	$	3.1
2012		6.0
2013		6.0
2014		6.0
2015		6.0
Thereafter		89.9
Total	$	117.0

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Property, Plant and Equipment

6 Months Ended

Jun. 30, 2011

Property, Plant and Equipment

Property, Plant and Equipment

5. Property, Plant and Equipment

A summary of property, plant and equipment by classification is as follows:

	Depreciable		June 30,			December 31,
	Life		2011			2010
			(Millions)
Gathering and transmission systems		15 — 30 Years	$	997.9		$	992.0
Processing, storage, and terminal facilities		20— 50 Years		542.9			513.2
Other		0— 30 Years		14.6			12.6
Construction work in progress				59.7			42.1
Property, plant and equipment				1,615.1			1,559.9
Accumulated depreciation				(499.8	)		(462.8	)
Property, plant and equipment, net			$	1,115.3		$	1,097.1

Interest capitalized on construction projects for the six months ended June 30, 2011 was $0.5 million and for the year ended December 31, 2010 was $0.2 million.

Depreciation expense was $18.6 million and $18.0 million for the three months ended June 30, 2011 and 2010, respectively, and $37.0 million and $35.0 million for the six months ended June 30, 2011 and 2010, respectively.

Asset Retirement Obligations — As of June 30, 2011, we had asset retirement obligations of $11.1 million included in other long-term liabilities in the consolidated balance sheet. As of December 31, 2010, we had asset retirement obligations of $10.8 million included in other long-term liabilities in the consolidated balance sheet. Accretion expense was $0.1 million and $0.1 million for the three months ended June 30, 2011 and 2010, respectively, and $0.3 million and $0.2 million for the six months ended June 30, 2011 and 2010, respectively.

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Goodwill and Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Dec. 31, 2009
Goodwill	$ 146.9		$ 146.9		$ 139.3	$ 92.1
Goodwill, purchase price adjustment	39.7		39.7
Amortization expense	1.5	0.7	3.0	1.5
Amortization periods, minimum			10
Amortization periods, maximum			24
Weighted-average remaining period			20
Intangible assets acquired	117.0		117.0		119.3
Natural Gas Services Segment [Member]
Goodwill	70.3		70.3		62.8
Wholesale Propane Logistics Segment [Member]
Goodwill	36.9		36.9		36.9
NGL Logistics Segment [Member]
Goodwill	39.7		39.7		39.7
Marysville Acquisition [Member]
Weighted-average remaining period			20
Intangible assets acquired	33.0		33.0
Michigan System [Member]
Goodwill, purchase price adjustment	$ 7.6		$ 7.6

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Condensed Consolidated Statements Of Cash Flows (USD $) In Millions	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
OPERATING ACTIVITIES:
Net income	$ 48.8		$ 59.2	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	40.0		36.5	[1]
Earnings from unconsolidated affiliates	(18.6)		(20.8)	[1],[2]
Distributions from unconsolidated affiliates	24.0		21.0
Other, net	(6.0)		1.1
Change in operating assets and liabilities, which provided (used) cash net of effects of acquisitions:
Accounts receivable	17.6		47.8
Inventories	21.7		14.6
Net unrealized losses (gains) on derivative instruments	12.9	[3]	(30.3)	[3]
Accounts payable	(29.9)		(42.5)
Accrued interest	0.1		0.1
Other current assets and liabilities	(19.2)		2.8
Other long-term assets and liabilities	(2.8)		0.2
Net cash provided by operating activities	88.6		89.7	[1]
INVESTING ACTIVITIES:
Capital expenditures	(29.2)		(25.4)	[1]
Acquisitions, net of cash acquired	(37.1)		(22.0)
Acquisition of unconsolidated affiliate	(114.3)
Investments in unconsolidated affiliates	(7.1)		(27.0)	[1]
Return of investment from unconsolidated affiliates	1.6
Proceeds from sale of assets	0.2		1.7	[1]
Proceeds from sales of available-for-sale securities			10.1	[1]
Net cash used in investing activities	(185.9)		(62.6)	[1]
FINANCING ACTIVITIES:
Proceeds from debt	716.0		210.6	[1]
Payments of debt	(653.0)		(208.6)	[1]
Payment of deferred financing costs	(0.1)
Proceeds from issuance of common units, net of offering costs	139.4
Excess purchase price over acquired assets	(35.7)
Net change in advances to predecessor from DCP Midstream, LLC			25.3	[1]
Distributions to unitholders and general partner	(63.4)		(49.1)	[1]
Distributions to noncontrolling interests	(15.8)		(8.2)	[1]
Contributions from noncontrolling interests	5.6		9.1	[1]
Purchase of additional interest in a subsidiary			(3.5)	[1]
Net cash provided by (used in) financing activities	93.0		(24.4)	[1]
Net change in cash and cash equivalents	(4.3)		2.7	[1]
Cash and cash equivalents, beginning of period	6.7	[4]	2.1	[1]
Cash and cash equivalents, end of period	$ 2.4		$ 4.8	[1]

[1] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

[3] Non-cash derivative mark-to-market is included in segment gross margin, along with cash settlements for our derivative contracts.

[4] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Supplementary Information - Condensed Consolidating Financial Information (Condensed Consolidating Statements of Operations) (Details) (USD $) In Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Sales of natural gas, propane, NGLs and condensate	$ 323.1	$ 228.0	[1]	$ 752.8		$ 598.4	[2]
Transportation, processing and other	38.5	27.0	[1]	74.1		54.3	[2]
Gains/Losses from commodity derivative activity, net	12.6	22.5	[1]	(27.6)		28.5	[2]
Total operating revenue	374.2	277.5	[1]	799.3		681.2	[2]
Purchases of natural gas, propane and NGLs	274.3	205.7	[1]	649.3		538.5	[2]
Operating and maintenance expense	21.7	20.6	[1]	(45.8)		39.6	[2]
Depreciation and amortization expense	20.1	18.7	[1]	40.0		36.5	[2]
General and administrative expense	8.6	8.2	[1]	(17.6)		16.8	[2]
Other income	(0.1)	(0.5)	[1]	(0.2)		(0.5)	[2]
Other income - affiliates		(3.0)	[1]			(3.0)	[2]
Total operating costs and expenses	324.6	249.7	[1]	752.5		627.9	[2]
Operating (loss) income	49.6	27.8	[1]	46.8		53.3	[2]
Interest expense	(8.4)	(7.3)	[1]	(16.4)		(14.5)	[2]
Earnings from unconsolidated affiliates	10.0	6.4	[1],[3]	18.6		20.8	[2],[3]
Income before income taxes	51.2	26.9	[1]	49.0		59.6	[2]
Income tax expense		(0.1)	[1],[4]	(0.2)	[4]	(0.4)	[2],[4]
Net income (loss)	51.2	26.8	[1]	48.8		59.2	[2]
Net income attributable to noncontrolling interests	(9.7)	(1.0)	[1]	(13.2)		(1.1)	[2]
Net income (loss) attributable to partners	41.5	25.8	[1]	35.6		58.1	[2]
DCP Midstream Partners, LP [Member]
Earnings from consolidated subsidiaries	41.5	25.8	[1]	35.6		58.1	[2]
Income before income taxes	41.5	25.8	[1]	35.6		58.1	[2]
Net income (loss)	41.5	25.8	[1]	35.6		58.1	[2]
Net income (loss) attributable to partners	41.5	25.8	[1]	35.6		58.1	[2]
Subsidiary Issuer [Member]
Interest expense	(8.4)	(7.3)	[1]	(16.4)		(14.4)	[2]
Earnings from consolidated subsidiaries	49.9	33.1	[1]	52.0		72.5	[2]
Income before income taxes	41.5	25.8	[1]	35.6		58.1	[2]
Net income (loss)	41.5	25.8	[1]	35.6		58.1	[2]
Net income (loss) attributable to partners	41.5	25.8	[1]	35.6		58.1	[2]
Non-Guarantor Subsidiaries [Member]
Sales of natural gas, propane, NGLs and condensate	323.1	228.0	[1]	752.8		598.4	[2]
Transportation, processing and other	38.5	27.0	[1]	74.1		54.3	[2]
Gains/Losses from commodity derivative activity, net	12.6	22.5	[1]	(27.6)		28.5	[2]
Total operating revenue	374.2	277.5	[1]	799.3		681.2	[2]
Purchases of natural gas, propane and NGLs	274.3	205.7	[1]	649.3		538.5	[2]
Operating and maintenance expense	21.7	20.6	[1]	(45.8)		39.6	[2]
Depreciation and amortization expense	20.1	18.7	[1]	40.0		36.5	[2]
General and administrative expense	8.6	8.2	[1]	(17.6)		16.8	[2]
Other income	(0.1)	(0.5)	[1]	(0.2)		(0.5)	[2]
Other income - affiliates		(3.0)	[1]			(3.0)	[2]
Total operating costs and expenses	324.6	249.7	[1]	752.5		627.9	[2]
Operating (loss) income	49.6	27.8	[1]	46.8		53.3	[2]
Interest expense						(0.1)	[2]
Earnings from unconsolidated affiliates	10.0	6.4	[1]	18.6		20.8	[2]
Income before income taxes	59.6	34.2	[1]	65.4		74.0	[2]
Income tax expense		(0.1)	[1]	(0.2)		(0.4)	[2]
Net income (loss)	59.6	34.1	[1]	65.2		73.6	[2]
Net income attributable to noncontrolling interests	(9.7)	(1.0)	[1]	(13.2)		(1.1)	[2]
Net income (loss) attributable to partners	49.9	33.1	[1]	52.0		72.5	[2]
Consolidating Adjustments [Member]
Earnings from consolidated subsidiaries	(91.4)	(58.9)	[1]	(87.6)		(130.6)	[2]
Income before income taxes	(91.4)	(58.9)	[1]	(87.6)		(130.6)	[2]
Net income (loss)	(91.4)	(58.9)	[1]	(87.6)		(130.6)	[2]
Net income (loss) attributable to partners	$ (91.4)	$ (58.9)	[1]	$ (87.6)		$ (130.6)	[2]

[1] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[3] As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

[4] Income tax expense relates primarily to the Texas margin tax and the Michigan business tax.

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Description of Business and Basis of Presentation

6 Months Ended

Jun. 30, 2011

Description of Business and Basis of Presentation

Description of Business and Basis of Presentation

1. Description of Business and Basis of Presentation

DCP Midstream Partners, LP, with its consolidated subsidiaries, or us, we or our, is engaged in the business of gathering, compressing, treating, processing, transporting, storing and selling natural gas; and producing, fractionating, transporting, storing and selling NGLs and condensate.

We are a Delaware limited partnership that was formed in August 2005. We completed our initial public offering on December 7, 2005. Our partnership includes: our Northern Louisiana system; our Southern Oklahoma system; our 40% limited liability company interest in Discovery Producer Services LLC, or Discovery; our Wyoming system; a 75% interest in Collbran Valley Gas Gathering, LLC, or Collbran or our Colorado system (of which 5% was acquired in February 2010); our 50.1% interest in our DCP East Texas Holdings, LLC, or our East Texas system; our Michigan system; our 33.33% interest in our DCP Southeast Texas Holdings, GP, or our Southeast Texas system acquired in January 2011; our wholesale propane logistics business (which includes Atlantic Energy acquired in July 2010); and our NGL logistics business (which includes Marysville Hydrocarbons Holdings, Inc, or Marysville, acquired in December 2010, the Wattenberg pipeline acquired in January 2010 and our 100% interest in the Black Lake Pipeline Company, or Black Lake, 55% of which was acquired in July 2010, comprised of: (1) a 5% interest acquired from DCP Midstream, LLC, in a transaction among entities under common control, and (2) an additional 50% interest acquired from an affiliate of BP PLC; and the DJ Basin NGL Fractionators acquired in March 2011).

Our operations and activities are managed by our general partner, DCP Midstream GP, LP, which in turn is managed by its general partner, DCP Midstream GP, LLC, which we refer to as the General Partner, and is wholly-owned by DCP Midstream, LLC. DCP Midstream, LLC and its subsidiaries and affiliates, collectively referred to as DCP Midstream, LLC, is owned 50% by Spectra Energy Corp, or Spectra Energy, and 50% by ConocoPhillips. DCP Midstream, LLC directs our business operations through its ownership and control of the General Partner. DCP Midstream, LLC and its affiliates' employees provide administrative support to us and operate most of our assets. DCP Midstream, LLC owns approximately 27% of us.

The condensed consolidated financial statements include the accounts of the Partnership and all majority-owned subsidiaries where we have the ability to exercise control and undivided interests in jointly owned assets. Investments in greater than 20% owned affiliates that are not variable interest entities and where we do not have the ability to exercise control, and investments in less than 20% owned affiliates where we have the ability to exercise significant influence, are accounted for using the equity method. Intercompany balances and transactions have been eliminated.

On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million, in a transaction among entities under common control. Transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method. Accordingly, our condensed consolidated financial statements have been adjusted to include the historical results of our equity interest in Southeast Texas for all periods presented. We refer to our 33.33% interest in Southeast Texas, prior to our acquisition from DCP Midstream, LLC in January 2011, as our "predecessor." We recognize transfers of net assets between entities under common control at DCP Midstream, LLC's basis in the net assets contributed. The amount of the purchase price in excess of DCP Midstream, LLC's basis in the net assets is recognized as a reduction to partners' equity. The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity.

The results of operations for acquisitions accounted for as business combinations have been included in the condensed consolidated financial statements since their respective acquisition dates and we have retrospectively adjusted the December 31, 2010 condensed consolidated balance sheet for changes in our preliminary purchase price allocation for our December 30, 2010 acquisition of Marysville.

The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP. Conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and notes. Although these estimates are based on management's best available knowledge of current and expected future events, actual results could differ from those estimates. All intercompany balances and transactions have been eliminated. Transactions between us and other DCP Midstream, LLC operations have been identified in the condensed consolidated financial statements as transactions between affiliates.

The accompanying unaudited condensed consolidated financial statements in this Quarterly Report on Form 10-Q have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission, or SEC. Accordingly, these condensed consolidated financial statements reflect all normal recurring adjustments that are, in the opinion of management, necessary to present fairly the financial position and results of operations for the respective interim periods. Certain information and notes normally included in our annual financial statements have been condensed or omitted from these interim financial statements pursuant to such rules and regulations. Results of operations for the three and six months ended June 30, 2011 are not necessarily indicative of the results that may be expected for the year ending December 31, 2011. These condensed consolidated financial statements and other information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and notes thereto included in our Current Report on Form 8-K filed on June 17, 2011.

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Supplementary Information - Condensed Consolidating Financial Information (Tables)

6 Months Ended

Jun. 30, 2011

Supplementary Information - Condensed Consolidating Financial Information

Condensed Consolidating Balance Sheets

	Condensed Consolidating Balance Sheets June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	1.5		$	1.9		$	(1.0	)	$	2.4
Accounts receivable		—		—			140.6			—			140.6
Inventories		—		—			42.4			—			42.4
Other		—		0.2			2.7			—			2.9
Total current assets		—		1.7			187.6			(1.0	)		188.3
Property, plant and equipment, net		—		—			1,115.3			—			1,115.3
Goodwill and intangible assets, net		—		—			263.9			—			263.9
Advances receivable — consolidated subsidiaries		409.3		582.7			—			(992.0	)		—
Investments in consolidated subsidiaries		190.8		339.7			—			(530.5	)		—
Investments in unconsolidated affiliates		—		—			218.5			—			218.5
Other long-term assets		—		1.8			7.2			—			9.0
Total assets	$	600.1	$	925.9		$	1,792.5		$	(1,523.5	)	$	1,795.0
LIABILITIES AND EQUITY
Accounts payable and other current liabilities	$	—	$	480.8		$	173.8		$	(1.0	)	$	653.6
Advances payable — consolidated subsidiaries		—		—			992.0			(992.0	)		—
Long-term debt		—		249.8			—			—			249.8
Other long-term liabilities		—		4.5			63.9			—			68.4
Total liabilities		—		735.1			1,229.7			(993.0	)		971.8
Commitments and contingent liabilities
Equity:
Partners' equity
Net equity		600.1		212.1			340.9			(530.5	)		622.6
Accumulated other comprehensive loss		—		(21.3	)		(1.2	)		—			(22.5	)
Total partners' equity		600.1		190.8			339.7			(530.5	)		600.1
Noncontrolling interests		—		—			223.1			—			223.1
Total equity		600.1		190.8			562.8			(530.5	)		823.2
Total liabilities and equity	$	600.1	$	925.9		$	1,792.5		$	(1,523.5	)	$	1,795.0

	Condensed Consolidating Balance Sheets December 31, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—	$	1.5		$	6.7		$	(1.5	)	$	6.7
Accounts receivable		—		—			151.0			—			151.0
Inventories		—		—			64.1			—			64.1
Other		—		—			10.2			—			10.2
Total current assets		—		1.5			232.0			(1.5	)		232.0
Property, plant and equipment, net		—		—			1,097.1			—			1,097.1
Goodwill and intangible assets, net		—		—			258.6			—			258.6
Advances receivable — consolidated subsidiaries		333.4		534.7			—			(868.1	)		—
Investments in consolidated subsidiaries		297.5		436.2			—			(733.7	)		—
Investments in unconsolidated affiliates		—		—			216.9			—			216.9
Other long-term assets		—		2.3			6.3			—			8.6
Total assets	$	630.9	$	974.7		$	1,810.9		$	(1,603.3	)	$	1,813.2
LIABILITIES AND EQUITY
Accounts payable and other current liabilities	$	0.2	$	19.5		$	193.0		$	(1.5	)	$	211.2
Advances payable — consolidated subsidiaries		—		—			868.1			(868.1	)		—
Long-term debt		—		647.8			—			—			647.8
Other long-term liabilities		—		9.9			93.5			—			103.4
Total liabilities		0.2		677.2			1,154.6			(869.6	)		962.4
Commitments and contingent liabilities
Equity:
Partners' equity
Predecessor equity		—		—			112.6			—			112.6
Net equity		630.7		324.9			323.9			(733.7	)		545.8
Accumulated other comprehensive loss		—		(27.4	)		(0.3	)		—			(27.7	)
Total partners' equity		630.7		297.5			436.2			(733.7	)		630.7
Noncontrolling interests		—		—			220.1			—			220.1
Total equity		630.7		297.5			656.3			(733.7	)		850.8
Total liabilities and equity	$	630.9	$	974.7		$	1,810.9		$	(1,603.3	)	$	1,813.2

(a) The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

Condensed Consolidating Statements of Operations

	Condensed Consolidating Statements of Operations Three Months Ended June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	323.1		$	—		$	323.1
Transportation, processing and other		—		—			38.5			—			38.5
Gains from commodity derivative activity, net		—		—			12.6			—			12.6
Total operating revenues		—		—			374.2			—			374.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			274.3			—			274.3
Operating and maintenance expense		—		—			21.7			—			21.7
Depreciation and amortization expense		—		—			20.1			—			20.1
General and administrative expense		—		—			8.6			—			8.6
Other income		—		—			(0.1	)		—			(0.1	)
Total operating costs and expenses		—		—			324.6			—			324.6
Operating income (loss)		—		—			49.6			—			49.6
Interest expense, net		—		(8.4	)		—			—			(8.4	)
Income from consolidated subsidiaries		41.5		49.9			—			(91.4	)		—
Earnings from unconsolidated affiliates		—		—			10.0			—			10.0
Income before income taxes		41.5		41.5			59.6			(91.4	)		51.2
Income tax expense		—		—			—			—			—
Net income (loss)		41.5		41.5			59.6			(91.4	)		51.2
Net income attributable to noncontrolling interests		—		—			(9.7	)		—			(9.7	)
Net income (loss) attributable to partners	$	41.5	$	41.5		$	49.9		$	(91.4	)	$	41.5

	Condensed Consolidating Statements of Operations Three Months Ended June 30, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	228.0		$	—		$	228.0
Transportation, processing and other		—		—			27.0			—			27.0
Gains from commodity derivative activity, net		—		—			22.5			—			22.5
Total operating revenues		—		—			277.5			—			277.5
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			205.7			—			205.7
Operating and maintenance expense		—		—			20.6			—			20.6
Depreciation and amortization expense		—		—			18.7			—			18.7
General and administrative expense		—		—			8.2			—			8.2
Other income		—		—			(0.5	)		—			(0.5	)
Other income — affiliates		—		—			(3.0	)		—			(3.0	)
Total operating costs and expenses		—		—			249.7			—			249.7
Operating income		—		—			27.8			—			27.8
Interest expense, net		—		(7.3	)		—			—			(7.3	)
Earnings from consolidated subsidiaries		25.8		33.1			—			(58.9	)		—
Earnings from unconsolidated affiliates		—		—			6.4			—			6.4
Income before income taxes		25.8		25.8			34.2			(58.9	)		26.9
Income tax expense		—		—			(0.1	)		—			(0.1	)
Net income (loss)		25.8		25.8			34.1			(58.9	)		26.8
Net income attributable to noncontrolling interests		—		—			(1.0	)		—			(1.0	)
Net income (loss) attributable to partners	$	25.8	$	25.8		$	33.1		$	(58.9	)	$	25.8

(a) The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

	Condensed Consolidating Statements of Operations Six Months Ended June 30, 2011
	Parent Guarantor		Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	752.8		$	—		$	752.8
Transportation, processing and other		—		—			74.1			—			74.1
Losses from commodity derivative activity, net		—		—			(27.6	)		—			(27.6	)
Total operating revenues		—		—			799.3			—			799.3
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			649.3			—			649.3
Operating and maintenance expense		—		—			45.8			—			45.8
Depreciation and amortization expense		—		—			40.0			—			40.0
General and administrative expense		—		—			17.6			—			17.6
Other income		—		—			(0.2	)		—			(0.2	)
Total operating costs and expenses		—		—			752.5			—			752.5
Operating income		—		—			46.8			—			46.8
Interest expense, net		—		(16.4	)		—			—			(16.4	)
Earnings from consolidated subsidiaries		35.6		52.0			—			(87.6	)		—
Earnings from unconsolidated affiliates		—		—			18.6			—			18.6
Income before income taxes		35.6		35.6			65.4			(87.6	)		49.0
Income tax expense		—		—			(0.2	)		—			(0.2	)
Net income (loss)		35.6		35.6			65.2			(87.6	)		48.8
Net income attributable to noncontrolling interests		—		—			(13.2	)		—			(13.2	)
Net income (loss) attributable to partners	$	35.6	$	35.6		$	52.0		$	(87.6	)	$	35.6

	Condensed Consolidating Statements of Operations Six Months Ended June 30, 2010 (a)
	Parent Guarantor		Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	—	$	—		$	598.4		$	—		$	598.4
Transportation, processing and other		—		—			54.3			—			54.3
Gains from commodity derivative activity, net		—		—			28.5			—			28.5
Total operating revenues		—		—			681.2			—			681.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		—		—			538.5			—			538.5
Operating and maintenance expense		—		—			39.6			—			39.6
Depreciation and amortization expense		—		—			36.5			—			36.5
General and administrative expense		—		—			16.8			—			16.8
Other income		—		—			(0.5	)		—			(0.5	)
Other income — affiliates		—		—			(3.0	)		—			(3.0	)
Total operating costs and expenses		—		—			627.9			—			627.9
Operating income		—		—			53.3			—			53.3
Interest expense, net		—		(14.4	)		(0.1	)		—			(14.5	)
Earnings from consolidated subsidiaries		58.1		72.5			—			(130.6	)		—
Earnings from unconsolidated affiliates		—		—			20.8			—			20.8
Income before income taxes		58.1		58.1			74.0			(130.6	)		59.6
Income tax expense		—		—			(0.4	)		—			(0.4	)
Net income (loss)		58.1		58.1			73.6			(130.6	)		59.2
Net income attributable to noncontrolling interests		—		—			(1.1	)		—			(1.1	)
Net income (loss) attributable to partners	$	58.1	$	58.1		$	72.5		$	(130.6	)	$	58.1

(a) The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

Condensed Consolidating Statements of Cash Flows

	Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2011
	Parent Guarantor			Subsidiary Issuer			Non-Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
OPERATING ACTIVITIES
Net cash (used in) provided by operating activities	$	(76.0	)	$	(62.9	)	$	227.0		$	0.5		$	88.6
INVESTING ACTIVITIES:
Capital expenditures		—			—			(29.2	)		—			(29.2	)
Acquisitions, net of cash acquired		—			—			(151.4	)		—			(151.4	)
Investments in unconsolidated affiliates		—			—			(7.1	)		—			(7.1	)
Return of investment from unconsolidated affiliate		—			—			1.6			—			1.6
Proceeds from sale of assets		—			—			0.2			—			0.2
Net cash used in investing activities		—			—			(185.9	)		—			(185.9	)
FINANCING ACTIVITIES:
Proceeds from debt		—			716.0			—			—			716.0
Payments of debt		—			(653.0	)		—			—			(653.0	)
Payment of deferred financing costs		—			(0.1	)		—			—			(0.1	)
Proceeds from issuance of common units, net of offering costs		139.4			—			—			—			139.4
Excess purchase price over acquired assets		—			—			(35.7	)		—			(35.7	)
Distributions to unitholders and general partner		(63.4	)		—			—			—			(63.4	)
Distributions to noncontrolling interests		—			—			(15.8	)		—			(15.8	)
Contributions from noncontrolling interests		—			—			5.6			—			5.6
Net cash provided by (used in) financing activities		76.0			62.9			(45.9	)		—			93.0
Net change in cash and cash equivalents		—			—			(4.8	)		0.5			(4.3	)
Cash and cash equivalents, beginning of period		—			1.5			6.7			(1.5	)		6.7
Cash and cash equivalents, end of period	$	—		$	1.5		$	1.9		$	(1.0	)	$	2.4

	Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2010 (a)
	Parent Guarantor			Subsidiary Issuer			Non- Guarantor Subsidiaries			Consolidating Adjustments			Consolidated
	(Millions)
OPERATING ACTIVITIES
Net cash provided by (used in) operating activities	$	49.1		$	(12.0	)	$	53.5		$	(0.9	)	$	89.7
INVESTING ACTIVITIES:
Capital expenditures		—			—			(25.4	)		—			(25.4	)
Acquisitions, net of cash acquired		—			—			(22.0	)		—			(22.0	)
Investments in unconsolidated affiliates		—			—			(27.0	)		—			(27.0	)
Proceeds from sale of assets		—			—			1.7			—			1.7
Proceeds from sales of available-for-sale securities		—			10.1			—			—			10.1
Net cash provided by (used in) investing activities		—			10.1			(72.7	)		—			(62.6	)
FINANCING ACTIVITIES:
Proceeds from debt		—			210.6			—			—			210.6
Payments of debt		—			(208.6	)		—			—			(208.6	)
Distributions to unitholders and general partner		(49.1	)		—			—			—			(49.1	)
Distributions to noncontrolling interests		—			—			(8.2	)		—			(8.2	)
Contributions from noncontrolling interests		—			—			9.1			—			9.1
Net change in advances to predecessor from DCP Midstream LLC		—			—			25.3			—			25.3
Purchase of additional interest in a subsidiary		—			—			(3.5	)		—			(3.5	)
Net cash provided by (used in) financing activities		(49.1	)		2.0			22.7			—			(24.4	)
Net change in cash and cash equivalents		—			0.1			3.5			(0.9	)		2.7
Cash and cash equivalents, beginning of period		—			1.6			1.3			(0.8	)		2.1
Cash and cash equivalents, end of period	$	—		$	1.7		$	4.8		$	(1.7	)	$	4.8

(a) The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2011

Property, Plant and Equipment

Classification of Property, Plant and Equipment

	Depreciable		June 30,			December 31,
	Life		2011			2010
			(Millions)
Gathering and transmission systems		15 — 30 Years	$	997.9		$	992.0
Processing, storage, and terminal facilities		20— 50 Years		542.9			513.2
Other		0— 30 Years		14.6			12.6
Construction work in progress				59.7			42.1
Property, plant and equipment				1,615.1			1,559.9
Accumulated depreciation				(499.8	)		(462.8	)
Property, plant and equipment, net			$	1,115.3		$	1,097.1

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Investments in Unconsolidated Affiliates (Earnings from Investments in Unconsolidated Affiliates) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended			3 Months Ended			6 Months Ended				6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011 Discovery [Member]	Jun. 30, 2010 Discovery [Member]		Jun. 30, 2011 Discovery [Member]	Jun. 30, 2010 Discovery [Member]		Dec. 31, 2010 Discovery [Member]	Jun. 30, 2011 Black Lake [Member]	Jul. 31, 2010 Black Lake [Member]	Mar. 31, 2010 Black Lake [Member]	Jun. 30, 2010 Black Lake [Member]		Jun. 30, 2010 Black Lake [Member]		Jun. 30, 2011 Southeast Texas [Member]	Jun. 30, 2010 Southeast Texas [Member]		Jun. 30, 2011 Southeast Texas [Member]	Jun. 30, 2010 Southeast Texas [Member]		Dec. 31, 2010 Southeast Texas [Member]	Jul. 31, 2010 BP PLC [Member]	Jul. 30, 2010 BP PLC [Member]	Jun. 30, 2011 DCP Midstream, LLC [Member]	Jul. 31, 2010 DCP Midstream, LLC [Member]	Jul. 27, 2010 DCP Midstream, LLC [Member]
Earnings from unconsolidated affiliates	$ 10.0	$ 6.4	[1],[2]	$ 18.6	$ 20.8	[1],[3]	$ 5.7	$ 6.3	[1]	$ 10.2	$ 13.7	[1]					$ 0.3	[1]	$ 0.8	[1]	$ 4.3	$ (0.2)	[1]	$ 8.4	$ 6.3	[1]
Previously acquired ownership interest															55.00%													50.00%	50.00%		5.00%	5.00%
Ownership interest percentage																														27.00%
Percentage of ownership							40.00%			40.00%			40.00%			45.00%					33.00%			33.00%			33.00%
Additional acquired ownership interest														100.00%

[1] As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

[2] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[3] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Investments in Unconsolidated Affiliates (Summary of Balance Sheet Information) (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Investments in Unconsolidated Affiliates
Current assets	$ 112.6	[1]	$ 153.0	[1],[2]
Long-term assets	702.8	[1]	684.9	[1],[2]
Current liabilities	(68.2)	[1]	(121.4)	[1],[2]
Long-term liabilities	(30.3)	[1]	(30.3)	[1],[2]
Net assets	$ 716.9	[1]	$ 686.2	[1],[2]

[1] The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

[2] The combined financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Property, Plant and Equipment (Classification of Property, Plant and Equipment) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Property, plant and equipment	$ 1,615.1	$ 1,559.9
Accumulated depreciation	(499.8)	(462.8)
Property, plant and equipment, net	1,115.3	1,097.1	[1]
Gathering and Transmission Systems [Member]
Property, plant and equipment	997.9	992.0
Depreciable life, minimum	15
Depreciable life, maximum	30
Processing, Storage, and Terminal Facilities [Member]
Property, plant and equipment	542.9	513.2
Depreciable life, minimum	20
Depreciable life, maximum	50
Other Equipment [Member]
Property, plant and equipment, other	14.6	12.6
Depreciable life, minimum	0
Depreciable life, maximum	30
Construction Work in Progress [Member]
Property, plant and equipment	59.7	42.1
DCP Midstream Partners, LP [Member]
Property, plant and equipment, net			[1]

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Debt (Narrative) (Details) (USD $)	6 Months Ended							9 Months Ended			6 Months Ended		12 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Dec. 31, 2010		Jun. 30, 2011 Minimum [Member] Revolving Credit Facility [Member]	Jun. 30, 2011 Maximum [Member] Revolving Credit Facility [Member]	Sep. 30, 2010 Senior Notes 3.25% [Member]	Jun. 30, 2011 Senior Notes 3.25% [Member]	Dec. 31, 2010 Senior Notes 3.25% [Member]	Jun. 30, 2011 Contingent [Member]	Jun. 30, 2011 Contingent [Member] Revolving Credit Facility [Member]	Dec. 31, 2010 Contingent [Member] Revolving Credit Facility [Member]	Jun. 30, 2011 Midstream Energy Business [Member] Revolving Credit Facility [Member]	Jun. 30, 2011 Revolving Credit Facility [Member]	Dec. 31, 2010 Revolving Credit Facility [Member]
Revolving credit facility															$ 850,000,000
Net effective interest rate	4.31%														4.31%	4.28%
Long-term debt	249,800,000			647,800,000	[1]										461,000,000
Letters of credit outstanding amount	10,000,000
Letters of credit issued	0										0	1,100,000	32,100,000
Unused capacity under the revolving credit facility															387,900,000
Unused revolving credit facility available for general working capital purpose															367,000,000
Leverage ratio lower range														1.0	1.0
Leverage ratio higher range														5.5	5.0
Senior notes Issued								250,000,000
Proceeds from debt	716,000,000	210,600,000	[2]					247,700,000
Underwriters' fees								1,500,000
Related Expenses								600,000
Unamortized discount	$ 200,000							$ 200,000	$ 200,000	$ 200,000
Line of credit facility interest rate description	(1) the higher of Wells Fargo Bank's prime rate or the Federal Funds rate plus 0.50%; or (2) LIBOR plus an applicable margin, which ranges from 0.23% to 0.575% dependent upon our credit rating.
Fee per annum						0.07%	0.175%
Net fee on letters of credit issued	1.75%										0.50%

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Recent Accounting Pronouncements

6 Months Ended

Jun. 30, 2011

Recent Accounting Pronouncements

Recent Accounting Pronouncements

2. Recent Accounting Pronouncements

Financial Accounting Standards Board, or FASB, Accounting Standards Update, or ASU, 2011-04 "Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs", or ASU 2011-04 — In May 2011, the FASB issued ASU 2011-04 which amends Accounting Standards Codification, or ASC, Topic 820 "Fair Value Measurements and Disclosures" to change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements, clarify the FASB's intent about the application of existing fair value measurement requirements, and change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. The provisions of ASU 2011-04 are effective for us for interim and annual periods beginning after December 15, 2011 and we are currently assessing the impact of adoption on our consolidated results of operations, cash flows and financial position.

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Income Taxes (Narrative) (Details) (Marysville [Member], USD $) In Millions	0 Months Ended
	Apr. 18, 2011	Jun. 30, 2011	Jan. 04, 2011	Dec. 31, 2010
Marysville [Member]
Income Taxes Paid	$ 29.3
Taxes Payable, Current	$ 5.7	$ 5.7	$ 35.0	$ 35.0

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Acquisitions (Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended			6 Months Ended						3 Months Ended			6 Months Ended						6 Months Ended			3 Months Ended		6 Months Ended					1 Months Ended			0 Months Ended	3 Months Ended	6 Months Ended
	Mar. 24, 2011	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011	Jun. 30, 2010		Jun. 15, 2011	Dec. 31, 2010		Jun. 30, 2011 DCP Midstream Partners, LP [Member]	Jun. 30, 2010 DCP Midstream Partners, LP [Member]		Jun. 30, 2011 DCP Midstream Partners, LP [Member]	Jun. 30, 2010 DCP Midstream Partners, LP [Member]		Dec. 31, 2010 DCP Midstream Partners, LP [Member]		Mar. 24, 2011 Weld County Fractionators [Member]	Jun. 30, 2011 Black Lake [Member]	Jul. 31, 2010 Black Lake [Member]	Mar. 31, 2010 Black Lake [Member]	Jun. 30, 2010 Southeast Texas [Member]		Jun. 30, 2011 Southeast Texas [Member]	Jun. 30, 2010 Southeast Texas [Member]		Jul. 31, 2010 DCP Midstream, LLC [Member]	Jul. 27, 2010 DCP Midstream, LLC [Member]	Dec. 30, 2010 Dart Energy Corporation [Member]	Dec. 30, 2010 Prospect Street Energy [Member]	Dec. 30, 2010 EE Group [Member]	Apr. 18, 2011 Marysville [Member]	Jun. 30, 2011 Marysville [Member]	Jun. 30, 2011 Marysville [Member]	Jan. 04, 2011 Marysville [Member]	Dec. 31, 2010 Marysville [Member]	Dec. 30, 2010 Marysville [Member]
Facilities Acquired	2
Business acquisition purchase price, assets acquired																			$ 30.0
Purchase price adjustment																			0.4
Business acquisition purchase price		100.8			100.8																				150.0													100.8
Previously acquired ownership interest																					55.00%				33.33%			5.00%	5.00%
Business acquisition cash paid																									150.0													94.8
Net working capital and other adjustments																																						6.0
Escrow deposit									19.5																													21.2
Escrow release								1.7
Historical carrying value of net assets acquired																									114.3
Excess purchase price over acquired assets					35.7																				35.7
Additional percentage of ownership interest																						45.00%			33.33%
Additional acquired ownership interest																				100.00%										90.00%	5.00%	100.00%
Fair value of contingent consideration		100.8			100.8
Noncontrolling interests		223.1			223.1				220.1	[1]								[1]
Estimated deferred tax liabilities																																	5.7	5.7	5.7	35.0	35.0
Estimated federal tax payment																																	29.3
Operating revenue		374.2	277.5	[2]	799.3	681.2	[3]																	[4]										5.3	15.9
Net income (loss)		$ 51.2	$ 26.8	[2]	$ 48.8	$ 59.2	[3]				$ 41.5	$ 25.8	[2]	$ 35.6	$ 58.1	[3]							$ (0.2)	[4]		$ 6.3	[4],[5]							$ 4.2	$ 7.7

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[3] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[4] The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

[5] The results of our 33.33% interest in Southeast Texas for the six months ended June 30, 2010 includes the impact of Hurricane Ike business interruption insurance recoveries.

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Description of Business and Basis of Presentation (Policy)

6 Months Ended

Jun. 30, 2011

Description of Business and Basis of Presentation

Significant Accounting Policy

The condensed consolidated financial statements include the accounts of the Partnership and all majority-owned subsidiaries where we have the ability to exercise control and undivided interests in jointly owned assets. Investments in greater than 20% owned affiliates that are not variable interest entities and where we do not have the ability to exercise control, and investments in less than 20% owned affiliates where we have the ability to exercise significant influence, are accounted for using the equity method. Intercompany balances and transactions have been eliminated.

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Debt (Future Maturities of Long-Term Debt) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Debt
2012
2013
2014
2015	250.0
Thereafter
Unamortized discount	(0.2)
Total long-term debt	$ 249.8	$ 647.8	[1]

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Business Segments (Narrative) (Details)					6 Months Ended
	Jun. 30, 2011 Discovery [Member]	Jun. 30, 2011 Collbran [Member]	Jun. 30, 2011 East Texas System [Member]	Jan. 31, 2011 South East Texas [Member]	Jun. 30, 2011 Wholesale Propane Logistics [Member]
Percentage of ownership	40.00%			33.33%
Ownership interest percentage		75.00%	50.10%
Number of owned and operated rail terminals					6
Number of owned marine import terminals					1
Number of lease marine terminals					1
Number of pipeline and several open access pipeline terminals					1

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Fair Value Measurement (Financial Instruments Carried at Fair Value) (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Current Assets [Member] | Level 1 [Member] | Commodity Derivatives [Member]
Derivative Assets		[1]		[1]
Current Assets [Member] | Level 2 [Member] | Commodity Derivatives [Member]
Derivative Assets	0.7	[1]	1.6	[1]
Current Assets [Member] | Level 3 [Member] | Commodity Derivatives [Member]
Derivative Assets	0.6	[1]	0.3	[1]
Current Assets [Member] | Commodity Derivatives [Member]
Derivative Assets	1.3	[1]	1.9	[1]
Long-Term Assets [Member] | Level 1 [Member] | Commodity Derivatives [Member]
Derivative Assets		[2]		[2]
Long-Term Assets [Member] | Level 2 [Member] | Commodity Derivatives [Member]
Derivative Assets	1.4	[2]	1.1	[2]
Long-Term Assets [Member] | Level 3 [Member] | Commodity Derivatives [Member]
Derivative Assets	0.3	[2]	0.3	[2]
Long-Term Assets [Member] | Commodity Derivatives [Member]
Derivative Assets	1.7	[2]	1.4	[2]
Current Liabilities [Member] | Level 1 [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		[3]		[3]
Current Liabilities [Member] | Level 1 [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value		[3]		[3]
Current Liabilities [Member] | Level 2 [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(28.6)	[3]	(25.9)	[3]
Current Liabilities [Member] | Level 2 [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value	(17.2)	[3]	(17.0)	[3]
Current Liabilities [Member] | Level 3 [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(1.2)	[3]	(0.1)	[3]
Current Liabilities [Member] | Level 3 [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value				[3]
Current Liabilities [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(29.8)	[3]	(26.0)	[3]
Current Liabilities [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value	(17.2)	[3]	(17.0)	[3]
Long-Term Liabilities [Member] | Level 1 [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		[4]		[4]
Long-Term Liabilities [Member] | Level 1 [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value		[4]		[4]
Long-Term Liabilities [Member] | Level 2 [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(47.8)	[4]	(39.9)	[4]
Long-Term Liabilities [Member] | Level 2 [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value	(4.5)	[4]	(9.9)	[4]
Long-Term Liabilities [Member] | Level 3 [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(0.3)	[4]	(0.5)	[4]
Long-Term Liabilities [Member] | Level 3 [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value				[4]
Long-Term Liabilities [Member] | Commodity Derivatives [Member]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(48.1)	[4]	(40.4)	[4]
Long-Term Liabilities [Member] | Interest Rate Derivatives [Member]
Interest Rate Derivative Liabilities, at Fair Value	$ (4.5)	[4]	$ (9.9)	[4]

[1] Included in current unrealized gains on derivative instruments in our condensed consolidated balance sheets.

[2] Included in long-term unrealized gains on derivative instruments in our condensed consolidated balance sheets.

[3] Included in current unrealized losses on derivative instruments in our condensed consolidated balance sheets.

[4] Included in long-term unrealized losses on derivative instruments in our condensed consolidated balance sheets.

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Investments in Unconsolidated Affiliates (Tables)

6 Months Ended

Jun. 30, 2011

Investments in Unconsolidated Affiliates

Investments in Unconsolidated Affiliates

	Percentage of Ownership as of June 30, 2011 and December 31, 2010	Carrying Value as of
		June 30, 2011		December 31, 2010
		(Millions)
Discovery Producer Services LLC	40%	$	103.5	$	104.1
Southeast Texas	33%		114.8		112.6
Other	50%		0.2		0.2
Total investments in unconsolidated affiliates		$	218.5	$	216.9

Earnings from Investments in Unconsolidated Affiliates

	Three Months Ended June  30,					Six Months Ended June  30,
	2011		2010 (a)			2011		2010 (a)
	(Millions)
Discovery Producer Services LLC	$	5.7	$	6.3		$	10.2	$	13.7
Southeast Texas		4.3		(0.2	)		8.4		6.3
Black Lake Pipe Line Company and other		—		0.3			—		0.8
Total earnings from unconsolidated affiliates	$	10.0	$	6.4		$	18.6	$	20.8

(a) As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

Equity Method Investment Summarized Financial Information

	Three Months Ended June  30,				Six Months Ended June  30,
	2011 (a)		2010 (b)		2011 (a)		2010 (b)
	(Millions)
Statements of operations:
Operating revenue	$	233.1	$	215.8	$	493.0	$	518.4
Operating expenses	$	210.9	$	201.6	$	451.0	$	466.3
Net income	$	22.1	$	14.2	$	41.7	$	52.2

(a) The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

(b) The combined financial information for the three and six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

	June 30, 2011 (a)			December 31, 2010 (a) (b)
	(Millions)
Balance sheets:
Current assets	$	112.6		$	153.0
Long-term assets		702.8			684.9
Current liabilities		(68.2	)		(121.4	)
Long-term liabilities		(30.3	)		(30.3	)
Net assets	$	716.9		$	686.2

(a) The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

(b) The combined financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Description of Business and Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified														6 Months Ended						1 Months Ended
	Jun. 30, 2011	Jun. 30, 2011 Investment In Greater Than 20% [Member]	Jun. 30, 2011 Investment In Less Than 20% [Member]	Jun. 30, 2011 Southeast Texas [Member]	Jun. 30, 2011 Discovery [Member]	Jun. 30, 2011 East Texas System [Member]	Jul. 31, 2010 BP PLC [Member]	Jul. 30, 2010 BP PLC [Member]	Jun. 30, 2011 Spectra Energy Corp [Member]	Jun. 30, 2011 ConocoPhillips [Member]	Jun. 30, 2011 DCP Midstream, LLC [Member]	Jul. 31, 2010 DCP Midstream, LLC [Member]	Jul. 27, 2010 DCP Midstream, LLC [Member]	Jun. 30, 2011 Black Lake [Member]	Jul. 31, 2010 Black Lake [Member]	Mar. 31, 2010 Black Lake [Member]	Jun. 30, 2011 Collbran [Member]	Dec. 31, 2010 Collbran [Member]	Feb. 28, 2010 Collbran [Member]	Dec. 30, 2010 EE Group [Member]
Additional percentage of ownership interest		20.00%	20.00%	33.33%	40.00%											45.00%
Previously acquired ownership interest				33.33%			50.00%	50.00%				5.00%	5.00%		55.00%				5.00%
Ownership interest percentage						50.10%			50.00%	50.00%	27.00%						75.00%	75.00%
Additional acquired ownership interest														100.00%						100.00%
Subsidiary of limited liability company limited partnership additional ownership interest	$ 100.8			$ 150.0

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Agreements and Transactions with Affiliates (Tables)

6 Months Ended

Jun. 30, 2011

Agreements and Transactions with Affiliates

Schedule of Fees Incurred and Other Fees Paid

	Three Months Ended June  30,				Six Months Ended June  30,
	2011		2010		2011		2010
	(Millions)
Omnibus Agreement	$	2.5	$	2.4	$	5.0	$	4.9
Other fees — DCP Midstream, LLC		2.3		2.4		4.5		4.7
Total — DCP Midstream, LLC	$	4.8	$	4.8	$	9.5	$	9.6

Transactions with Affiliates

	Three Months Ended June  30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
DCP Midstream, LLC:
Sales of natural gas, propane, NGLs and condensate	$	158.9		$	131.9		$	290.0		$	265.5
Transportation, processing and other	$	6.3		$	2.7		$	9.5		$	6.5
Purchases of natural gas, propane and NGLs	$	35.5		$	23.7		$	98.5		$	86.5
Losses from commodity derivative activity, net	$	(0.6	)	$	(0.3	)	$	(1.9	)	$	(0.3	)
General and administrative expense	$	4.8		$	4.8		$	9.5		$	9.6
Interest expense	$	—		$	0.1		$	—		$	0.2
Spectra Energy:
Transportation, processing and other	$	—		$	0.2		$	—		$	0.2
Purchases of natural gas, propane and NGLs	$	46.5		$	2.3		$	131.7		$	76.4
Other income	$	—		$	3.0		$	—		$	3.0
ConocoPhillips:
Sales of natural gas, propane, NGLs and condensate	$	8.9		$	2.9		$	10.0		$	4.3
Transportation, processing and other	$	1.8		$	2.0		$	3.7		$	3.9
Purchases of natural gas, propane and NGLs	$	2.1		$	1.6		$	3.5		$	3.6
General and administrative expense	$	0.1		$	—		$	0.2		$	0.1
Unconsolidated affiliates:
Purchases of natural gas, propane and NGLs	$	—		$	—		$	3.1		$	2.4

Balances with Affiliates

	June 30, 2011			December 31, 2010
	(Millions)
DCP Midstream, LLC:
Accounts receivable	$	70.3		$	60.1
Accounts payable	$	26.4		$	27.0
Unrealized gains on derivative instruments — current	$	0.1		$	1.3
Unrealized losses on derivative instruments — current	$	(1.6	)	$	(1.8	)
Spectra Energy:
Accounts payable	$	2.3		$	8.7
ConocoPhillips:
Accounts receivable	$	3.9		$	1.6
Accounts payable	$	0.5		$	1.0
Unconsolidated affiliates:
Accounts payable	$	—		$	0.9

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Risk Management and Hedging Activities

6 Months Ended

Jun. 30, 2011

Risk Management and Hedging Activities

Risk Management and Hedging Activities

10. Risk Management and Hedging Activities

Our day to day operations expose us to a variety of risks including but not limited to changes in the prices of commodities that we buy or sell, changes in interest rates, and the creditworthiness of each of our counterparties. We manage certain of these exposures with both physical and financial transactions. We have established a comprehensive risk management policy, or Risk Management Policy, and a risk management committee, or the Risk Management Committee, to monitor and manage market risks associated with commodity prices and counterparty credit. The Risk Management Committee is responsible for the overall management of credit risk and commodity price risk, including monitoring exposure limits. The following briefly describes each of the risks that we manage.

Commodity Price Risk

We are exposed to the impact of market fluctuations in the prices of natural gas, NGLs and condensate as a result of our gathering, processing, sales and storage activities. For gathering and processing and storage services, we may receive fees or commodities as payment for these services, depending on the contract type. We enter into derivative financial instruments to mitigate a portion of the risk of weakening natural gas, NGL and condensate prices associated with our gathering, processing and sales activities, thereby stabilizing our cash flows. We have mitigated a portion of our expected commodity price risk associated with our gathering, processing and sales activities through 2016 with commodity derivative instruments. Given the limited liquidity and tenor of the NGL derivatives market, we have primarily utilized crude oil swaps to mitigate a portion of our commodity price exposure for NGLs. For the nearer tenor where there is greater liquidity in the NGL derivatives market, we have periodically also utilized NGL derivatives. Historically, prices of NGLs have been generally related to the price of crude oil, with some exceptions, notably in late 2008 to early 2009, when NGL pricing was at a greater discount to crude oil pricing. When the relationship of NGL prices to crude oil prices is at a discount to historical ranges, we experience additional exposure as a result of the relationship. When our crude oil swaps become short-term in nature, we have periodically converted certain crude oil derivatives to NGL derivatives by entering into offsetting crude oil swaps while adding NGL swaps. Our crude oil and NGL transactions are primarily accomplished through the use of forward contracts that effectively exchange our floating price risk for a fixed price. We also utilize crude oil costless collars that minimize our floating price risk by establishing a fixed price floor and a fixed price ceiling. However, the type of instrument that we use to mitigate a portion of our risk may vary depending upon our risk management objective. These transactions are not designated as hedging instruments for accounting purposes and the change in fair value is reflected within our condensed consolidated statements of operations as a gain or a loss on commodity derivative activity.

With respect to our Pelico system, we may enter into financial derivatives to lock in transportation margins across the system, or to lock in margins around our leased storage facility to maximize value. This objective may be achieved through the use of physical purchases or sales of gas that are accounted for under accrual accounting. While the physical purchase or sale of gas transactions are accounted for under accrual accounting and any inventory is stated at lower of cost or market, the swaps are not designated as hedging instruments for accounting purposes and any change in fair value of these instruments is reflected within our condensed consolidated statements of operations.

Our Wholesale Propane Logistics segment is generally designed to establish stable margins by entering into supply arrangements that specify prices based on established floating price indices and by entering into sales agreements that provide for floating prices that are tied to our variable supply costs plus a margin. To the extent possible, we match the pricing of our supply portfolio to our sales portfolio in order to lock in value and reduce our overall commodity price risk. However, to the extent that we carry propane inventories or our sales and supply arrangements are not aligned, we are exposed to market variables and commodity price risk. We manage the commodity price risk of our supply portfolio and sales portfolio with both physical and financial transactions. While the majority of our sales and purchases in this segment are index-based, occasionally, we may enter into fixed price sales agreements in the event that a retail propane distributor desires to purchase propane from us on a fixed price basis. In such cases, we may manage this risk with derivatives that allow us to swap our fixed price risk to market index prices that are matched to our market index supply costs. In addition, we may on occasion use financial derivatives to manage the value of our propane inventories. These transactions are not designated as hedging instruments for accounting purposes and the change in value is reflected in the current period within our condensed consolidated statements of operations as a gain or loss on commodity derivative activity.

Our portfolio of commodity derivative activity is primarily accounted for using the mark-to-market method of accounting, whereby changes in fair value are recorded directly to the condensed consolidated statements of operations; however, depending upon our risk profile and objectives, in certain limited cases, we may execute transactions that qualify for the hedge method of accounting.

Commodity Cash Flow Hedges — Effective July 1, 2007, we elected to discontinue using the hedge method of accounting for derivatives that manage our commodity price risk. Prior to July 1, 2007, we used commodity swaps to mitigate a portion of the risk of market fluctuations in the price of NGLs, natural gas and condensate. Given our election to discontinue using the hedge method of accounting, the remaining net losses deferred in accumulated other comprehensive income, or AOCI, relative to cash flow hedges are reclassified to sales of natural gas, propane, NGLs and condensate, through December 2011, as the underlying transactions impact earnings.

On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million and account for our interest as an equity method investment. Southeast Texas commenced an expansion project to build an additional storage cavern. In order for storage facilities to remain operational, a minimum level of base gas must be maintained in each storage cavern. Upon completion of the expansion project, Southeast Texas will be required to purchase a significant amount of base gas to bring the storage cavern to operation. To mitigate the risk associated with this forecasted purchase of natural gas, Southeast Texas executed derivative financial instruments which have been designated as cash flow hedges. Any effective changes in fair value of these derivative instruments will be deferred in AOCI until the underlying purchase of inventory occurs. While the cash paid or received upon settlement of these hedges will economically offset the cash required to purchase the base gas, any deferred gain or loss at the time of the purchase will remain in AOCI until such time that the cavern is emptied and the base gas is sold. We recognize our proportionate share of the Southeast Texas base gas commodity derivative activity in AOCI, with corresponding adjustments to our investment in Southeast Texas.

Interest Rate Risk

We mitigate a portion of our interest rate risk with interest rate swaps that reduce our exposure to market rate fluctuations by converting variable interest rates to fixed interest rates. These interest rate swap agreements convert the interest rate associated with the indebtedness outstanding under our revolving credit facility to a fixed rate obligation, thereby reducing the exposure to market rate fluctuations.

At June 30, 2011, we had interest rate swap agreements totaling $450.0 million, of which we have designated $425.0 million as cash flow hedges and account for the remaining $25.0 million under the mark-to-market method of accounting. As we generally expect to have variable rate debt levels equal to or exceeding our swap positions during their term, the entire $450.0 million of these arrangements generally mitigate our interest rate risk through June 2012, with $150.0 million extending from June 2012 through June 2014. Based on our current operations we believe our interest rate swap agreements adequately mitigate our interest rate risk associated with our variable rate debt.

We have designated $425.0 million of our interest rate swap agreements as cash flow hedges, and effectiveness is determined by matching the principal balance and terms with that of the specified obligation. The effective portions of changes in fair value are recognized in AOCI in the condensed consolidated balance sheets and are reclassified into earnings as the hedged transactions impact earnings. The effect that these swaps have on our condensed consolidated financial statements, as well as the effect that is expected over the upcoming 12 months is summarized in the charts below. However, due to the volatility of the interest rate markets, the corresponding value in AOCI is subject to change prior to its reclassification into earnings. Ineffective portions of changes in fair value are recognized in earnings.

As of June 30, 2011, $275.0 million of the agreements reprice prospectively approximately every 90 days and the remaining $175.0 million of the agreements reprice prospectively approximately every 30 days. Under the terms of the interest rate swap agreements, we pay fixed rates ranging from 2.94% to 5.19%, and receive interest payments based on the three-month and one-month LIBOR. The differences to be paid or received under the interest rate swap agreements are recognized as an adjustment to interest expense.

Contingent Credit Features

Each of the above risks is managed through the execution of individual contracts with a variety of counterparties. Certain of our derivative contracts may contain credit-risk related contingent provisions that may require us to take certain actions in certain circumstances.

We have International Swap Dealers Association, or ISDA, contracts which are standardized master legal arrangements that establish key terms and conditions which govern certain derivative transactions. These ISDA contracts contain standard credit-risk related contingent provisions. Some of the provisions we are subject to are outlined below.

• If we were to have an effective event of default under our Credit Agreement that occurs and is continuing, our ISDA counterparties may have the right to request early termination and net settlement of any outstanding derivative liability positions.

• In the event that we or DCP Midstream, LLC were to be downgraded below investment grade by at least one of the major credit rating agencies, certain of our ISDA counterparties have the right to reduce our collateral threshold to zero, potentially requiring us to fully collateralize any commodity contracts in a net liability position.

• Additionally, in some cases, our ISDA contracts contain cross-default provisions that could constitute a credit-risk related contingent feature. These provisions apply if we default in making timely payments under those agreements and the amount of the default is above certain predefined thresholds, which are significantly high and are generally consistent with the terms of our Credit Agreement. As of June 30, 2011, we are not a party to any agreements that would be subject to these provisions other than our credit agreement.

Our commodity derivative contracts that are not governed by ISDA contracts do not have any credit-risk related contingent features.

Depending upon the movement of commodity prices and interest rates, each of our individual contracts with counterparties to our commodity derivative instruments or to our interest rate swap instruments are in either a net asset or net liability position. As of June 30, 2011, we had $76.1 million of individual commodity derivative contracts that contain credit-risk related contingent features that were in a net liability position, and have not posted any cash collateral relative to such positions. If a credit-risk related event were to occur and we were required to net settle our position with an individual counterparty, our ISDA contracts permit us to net all outstanding contracts with that counterparty, whether in a net asset or net liability position, as well as any cash collateral already posted. As of June 30, 2011, if a credit-risk related event were to occur we may be required to post additional collateral. Additionally, although our commodity derivative contracts that contain credit-risk related contingent features were in a net liability position as of June 30, 2011, if a credit-risk related event were to occur, the net liability position would be partially offset by contracts in a net asset position reducing our net liability to $73.5 million.

As of June 30, 2011, our interest rate swaps were in a net liability position of approximately $21.7 million, of which, the entire amount is subject to credit-risk related contingent features. If we were to have a default of any of our covenants to our Credit Agreement, that occurs and is continuing, the counterparties to our swap instruments have the right to request that we net settle the instrument in the form of cash.

Collateral

As of June 30, 2011, we had a contingent letter of credit facility for up to $10.0 million, on which we have no letters of credit issued. DCP Midstream, LLC had issued and outstanding parental guarantees totaling $95.0 million in favor of certain counterparties to our commodity derivative instruments. This contingent letter of credit facility and the parental guarantees reduce the amount of cash we may be required to post as collateral. As of June 30, 2011, we had no cash collateral posted with counterparties to our commodity derivative instruments.

Summarized Derivative Information

The following summarizes the balance within AOCI relative to our commodity and interest rate cash flow hedges:

	June 30, 2011			December 31, 2010
	(Millions)
Commodity cash flow hedges:
Net deferred losses in AOCI	$	(1.2	)	$	(0.3	)
Interest rate cash flow hedges:
Net deferred losses in AOCI		(21.3	)		(27.4	)
Total AOCI	$	(22.5	)	$	(27.7	)

The fair value of our derivative instruments that are designated as hedging instruments, those that are marked-to-market each period, as well as the location of each within our condensed consolidated balance sheets, by major category, is summarized as follows:

		00000000		00000000	00000000		00000000			00000000
Balance Sheet Line Item	June 30, 2011		December 31, 2010		Balance Sheet Line Item	June 30, 2011			December 31, 2010
	(Millions)					(Millions)
Derivative Assets Designated as Hedging Instruments:					Derivative Liabilities Designated as Hedging Instruments:
Interest rate derivatives:					Interest rate derivatives:
Unrealized gains on derivative instruments – current	$	—	$	—	Unrealized losses on derivative instruments – current	$	(16.3	)	$	(12.2	)
Unrealized gains on derivative instruments – long term		—		—	Unrealized losses on derivative instruments – long term		(4.5	)		(5.4	)
	$	—	$	—		$	(20.8	)	$	(17.6	)
Derivative Assets Not Designated as Hedging Instruments:					Derivative Liabilities Not Designated as Hedging Instruments:
Commodity derivatives:					Commodity derivatives:
Unrealized gains on derivative instruments – current	$	1.3	$	1.9	Unrealized losses on derivative instruments – current	$	(29.8	)	$	(26.0	)
Unrealized gains on derivative instruments – long term		1.7		1.4	Unrealized losses on derivative instruments – long term		(48.1	)		(40.4	)
	$	3.0	$	3.3		$	(77.9	)	$	(66.4	)
Interest rate derivatives:					Interest rate derivatives:
Unrealized gains on derivative instruments – current	$	—	$	—	Unrealized losses on derivative instruments – current	$	(0.9	)	$	(4.8	)
Unrealized gains on derivative instruments – long term		—		—	Unrealized losses on derivative instruments – long term		—			(4.5	)
	$	—	$	—		$	(0.9	)	$	(9.3	)

The following table summarizes the impact on our condensed consolidated balance sheets and condensed consolidated statements of operations of our derivative instruments that are accounted for using the cash flow hedge method of accounting.

	(Loss) Recognized in AOCI on Derivatives — Effective  Portion						Loss Reclassified From AOCI to Earnings — Effective Portion						Gain (Loss) Recognized in Income on Derivatives — Ineffective Portion and Amount Excluded From Effectiveness Testing
	Three Months Ended June 30,
	2011			2010			2011			2010			2011		2010
	(Millions)						(Millions)						(Millions)
Interest rate derivatives	$	(3.3	)	$	(5.8	)	$	(5.1	)	$	(5.6	) (a)	$	—	$	—	(a)(c)
Commodity derivatives	$	(0.1	)	$	—		$	—		$	—	(b)	$	—	$	—	(b)(c)

(a) Included in interest expense in our condensed consolidated statements of operations.

(b) Included in sales of natural gas, propane, NGLs and condensate in our condensed consolidated statements of operations.

(c) For the three months ended June 30, 2011 and 2010, no derivative gains or losses were reclassified from AOCI to current period earnings as a result of the discontinuance of cash flow hedges related to certain forecasted transactions that are not probable of occurring.

	(Loss) Recognized in AOCI on Derivatives — Effective  Portion						Loss Reclassified From AOCI to Earnings —Effective Portion						Gain (Loss) Recognized in Income on Derivatives — Ineffective Portion and Amount Excluded From Effectiveness Testing					Deferred Losses in AOCI Expected to be Reclassified into Earnings
	Six Months Ended June 30,																	Over the Next
	2011			2010			2011			2010			2011		2010			12 Months
	(Millions)						(Millions)						(Millions)					(Millions)
Interest rate derivatives	$	(4.2	)	$	(13.4	)	$	(10.3	)	$	(11.2	) (a)	$	—	$	—	(a)(c)	$	(19.0	)
Commodity derivatives	$	(0.1	)	$	—		$	(0.1	)	$	(0.4	) (b)	$	—	$	—	(b)(c)	$	(0.1	)

(a) Included in interest expense in our condensed consolidated statements of operations.

(b) Included in sales of natural gas, propane, NGLs and condensate in our condensed consolidated statements of operations.

(c) For the six months ended June 30, 2011 and 2010, no derivative gains or losses were reclassified from AOCI to current period earnings as a result of the discontinuance of cash flow hedges related to certain forecasted transactions that are not probable of occurring.

Changes in value of derivative instruments, for which the hedge method of accounting has not been elected from one period to the next, are recorded in the condensed consolidated statements of operations. The following summarizes these amounts and the location within the condensed consolidated statements of operations that such amounts are reflected:

Commodity Derivatives: Statements of Operations Line Item	Three Months Ended June 30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
Third party:
Realized	$	(8.9	)	$	—		$	(14.9	)	$	(2.1	)
Unrealized		22.1			22.8			(10.8	)		30.9
Gains (losses) from commodity derivative activity, net	$	13.2		$	22.8		$	(25.7	)	$	28.8
Affiliates:
Realized	$	(0.4	)	$	0.2		$	(1.0	)	$	0.1
Unrealized		(0.2	)		(0.5	)		(0.9	)		(0.4	)
Losses from commodity derivative activity, net — affiliates	$	(0.6	)	$	(0.3	)	$	(1.9	)	$	(0.3	)
Interest Rate Derivatives: Statements of Operations Line Item	Three Months Ended June 30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
Third party:
Realized losses	$	(1.3	)	$	—		$	(2.3	)	$	—
Unrealized gains		1.2			—			2.8			—
Interest expense	$	(0.1	)	$	—		$	0.5		$	—

We do not have any derivative financial instruments that qualify as a hedge of a net investment.

The following tables represent, by commodity type, our net long or short positions that are expected to partially or entirely settle in each respective year. To the extent that we have long dated derivative positions that span multiple calendar years, the contract will appear in more than one line item in the tables below.

	June 30, 2011
	Crude Oil			Natural Gas			Natural Gas Liquids
Year of Expiration	Net Long (Short) Position (Bbls)			Net Long (Short) Position (MMBtu)			Net Long (Short) Position (Bbls)
2011		(178,281	)		(382,600	)		(633,195	)
2012		(1,021,587	)		(366,000	)		—
2013		(941,998	)		(365,000	)		—
2014		(547,500	)		(365,000	)		—
2015		(365,000	)		—			—
2016		(183,000	)		—			—

	June 30, 2010
	Crude Oil			Natural Gas			Natural Gas Liquids
Year of Expiration	Net Long (Short) Position (Bbls)			Net Long (Short) Position (MMBtu)			Net Long (Short) Position (Bbls)
2010		(490,360	)		(1,110,100	)		—
2011		(949,000	)		(985,500	)		—
2012		(777,750	)		(988,200	)		—
2013		(748,250	)		(584,000	)		—
2014		(456,250	)		—			—
2015		(182,500	)		—			—

We periodically enter into interest rate swap agreements to mitigate a portion of our floating rate interest exposure. As of June 30, 2011, we have swaps with notional values between $25.0 million and $80.0 million, which, in aggregate, exchange $450.0 million of our floating rate obligation to a fixed rate obligation through June 2012, with $150.0 million extending from June 2012 through June 2014.

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Investments in Unconsolidated Affiliates (Narrative) (Details) (Discovery [Member], USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Discovery [Member]
Deficit between the carrying amount of the investment and the underlying equity	$ (33.9)	$ (35.1)

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Supplementary Information - Condensed Consolidation Financial Information (Narrative) (Details) (Subsidiary Issuer [Member])	6 Months Ended
	Jun. 30, 2011
Subsidiary Issuer [Member]
Limited liability interest	100.00%

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Partnership Equity and Distributions (Cash Distribution) (Details) (USD $) In Millions, except Per Share data	6 Months Ended
	Jun. 30, 2011
Per Unit Distribution	$ 0.6325
May 13, 2011 [Member]
Per Unit Distribution	$ 0.6250
Total Cash Distribution	$ 33.4
February 14, 2011 [Member]
Per Unit Distribution	$ 0.6175
Total Cash Distribution	30.0
November 12, 2010 [Member]
Per Unit Distribution	$ 0.6100
Total Cash Distribution	27.4
August 13, 2010 [Member]
Per Unit Distribution	$ 0.6100
Total Cash Distribution	25.3
May 14, 2010 [Member]
Per Unit Distribution	$ 0.6000
Total Cash Distribution	24.6
February 12, 2010 [Member]
Per Unit Distribution	$ 0.6000
Total Cash Distribution	$ 24.6

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Fair Value Measurement (Narrative) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Senior Notes 3.25% [Member]	Dec. 31, 2010 Senior Notes 3.25% [Member]	Jun. 30, 2011 Level 1 [Member]	Jun. 30, 2011 Level 1 [Member]	Jun. 30, 2011 Level 2 [Member]	Jun. 30, 2011 Level 2 [Member]	Jun. 30, 2010 Collbran [Member] Level 3 [Member]	Feb. 28, 2010 Collbran [Member]
Additional acquired ownership interest									5.00%	5.00%
Business acquisition contingent consideration fair value									$ 0.5
Carrying value of outstanding balances	461.0	398.0
Fair value of outstanding balances	455.3	388.9
Senior notes percentage			3.25%
Senior notes carrying values			250.0	250.0
Senior notes fair value			251.1	247.0
Transfer into and out of Levels 1 and 2					$ 0	$ 0	$ 0	$ 0

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Acquisitions

6 Months Ended

Jun. 30, 2011

Acquisitions

Acquisitions

3. Acquisitions

On March 24, 2011, we acquired two NGL fractionation facilities in Weld County, Colorado, located in the Denver-Julesburg, or DJ, Basin, from a third party in a transaction accounted for as an asset acquisition. We paid a purchase price of $30.0 million, financed initially at closing with borrowings under the Partnership's revolving credit facility, and received a post-closing purchase price adjustment of $0.4 million. The NGL fractionation facilities, or the DJ Basin NGL Fractionators, are located on DCP Midstream, LLC's processing plant sites and are operated by DCP Midstream, LLC. Subsequent to our acquisition, DCP Midstream, LLC will continue to operate and supply certain committed NGLs produced by them in Weld County to our DJ Basin NGL Fractionators under the existing agreements that are effective through March 2018. The results of the assets are included in our NGL Logistics segment prospectively, from the date of acquisition.

On January 1, 2011, we acquired a 33.33% interest in Southeast Texas for $150.0 million, in a transaction among entities under common control, financed initially at closing with proceeds from our November 2010 public equity offering and borrowings under the Partnership's revolving credit facility. DCP Midstream, LLC's historical carrying value of the net assets acquired in the acquisition was $114.3 million; accordingly we have recorded the $35.7 million excess purchase price over acquired assets as a decrease in common unitholders equity. The results of our 33.33% interest in Southeast Texas are included in our Natural Gas Services segment for all periods presented.

On December 30, 2010, we acquired all of the interests in Marysville. The acquisition involved three separate transactions with a number of parties. We acquired a 90% interest in Marysville from Dart Energy Corporation, a 5% interest in Marysville from Prospect Street Energy, LLC and 100% of EE Group, LLC, which owned the remaining 5% interest in Marysville. We paid a purchase price of $94.8 million plus $6.0 million for net working capital and other adjustments for an aggregate purchase price of $100.8 million, subject to customary purchase price adjustments, for our 100% interest. The cash purchase was financed initially at closing with borrowings under the Partnership's revolving credit facility. $21.2 million of the purchase price has been deposited in an indemnity escrow to satisfy certain tax liabilities and provide for breaches of representations and warranties of the sellers. $19.5 million remains in the escrow account after $1.7 million was released on June 15, 2011. The results of the Marysville acquisition are included in our NGL Logistics segment prospectively, from the date of acquisition.

On January 4, 2011, we merged two wholly-owned subsidiaries of Marysville and converted the combined entity's organizational structure from a corporation to a limited liability company. This conversion to a limited liability company triggered tax liabilities, resulting from built-in tax gains recognized in the transaction, to become currently payable. Accordingly, $35.0 million of estimated deferred tax liabilities associated with this transaction and recorded at December 31, 2010, became currently payable as of January 4, 2011. These tax liabilities are unrelated to the tax liabilities of Marysville for which an indemnity escrow has been established. These tax liabilities may be greater or less than the $35.0 million we initially recorded in our balance sheet, depending on the final accounting for the Marysville business combination. On April 18, 2011, we made an estimated federal tax payment of $29.3 million related to our $35 million tax liability that resulted from our acquisition of Marysville. The remaining $5.7 million estimated tax payable is included in other current liabilities in our condensed consolidated balance sheet as of June 30, 2011.

We have updated our accounting for the Marysville business combination for the fair value of assets acquired and liabilities assumed including intangible assets and property, plant and equipment and goodwill. The purchase price allocation is preliminary and is based on initial estimates of fair values at the date of the acquisition. We are currently evaluating the preliminary purchase price allocation, which will be adjusted as additional information relative to the fair value of assets and liabilities becomes available. This allocation may change in subsequent financial statements pending the final estimates of fair value and the final outcome of our estimated tax liabilities. The preliminary purchase price allocation as of June 30, 2011 is as follows:

	June 30,
	2011
	(Millions)
Aggregate consideration	$	100.8
Cash		3.1
Accounts receivable		0.7
Inventory		4.6
Other current assets		0.7
Property, plant and equipment		57.1
Intangible assets		33.0
Goodwill		39.7
Other long-term assets		1.2
Other current liabilities		(4.3	)
Long-term liabilities		(35.0	)
Total preliminary purchase price allocation	$	100.8

Combined Financial Information

The results of our 33.33% interest in Southeast Texas are included in the condensed consolidated statements of operations for the three and six months ended June 30, 2011 and 2010. The following table presents the previously reported condensed consolidated statements of operations for the three and six months ended June 30, 2010, adjusted for the acquisition of a 33.33% interest in Southeast Texas from DCP Midstream, LLC

Three Months Ended June 30, 2010

	DCP Midstream Partners, LP (As previously reported)			Southeast Texas (a)			Combined DCP Midstream Partners, LP (As currently reported)
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	228.0		$	—		$	228.0
Transportation, processing and other		27.0			—			27.0
Gains from commodity derivative activity, net		22.5			—			22.5
Total operating revenues		277.5			—			277.5
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		205.7			—			205.7
Operating and maintenance expense		20.6			—			20.6
Depreciation and amortization expense		18.7			—			18.7
General and administrative expense and other		8.2			—			8.2
Other income		(3.5	)		—			(3.5	)
Total operating costs and expenses		249.7			—			249.7
Operating income		27.8			—			27.8
Interest expense, net		(7.3	)		—			(7.3	)
Earnings from unconsolidated affiliates		6.6			(0.2	)		6.4
Income before income taxes		27.1			(0.2	)		26.9
Income tax expense		(0.1	)		—			(0.1	)
Net income		27.0			(0.2	)		26.8
Net income attributable to noncontrolling interests		(1.0	)		—			(1.0	)
Net income attributable to partners	$	26.0		$	(0.2	)	$	25.8

(a) The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

Six Months Ended June 30, 2010

	DCP Midstream Partners, LP (As previously reported)			Southeast Texas (a)(b)		Combined DCP Midstream Partners, LP (As currently reported)
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	598.4		$	—	$	598.4
Transportation, processing and other		54.3			—		54.3
Gains from commodity derivative activity, net		28.5			—		28.5
Total operating revenues		681.2			—		681.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		538.5			—		538.5
Operating and maintenance expense		39.6			—		39.6
Depreciation and amortization expense		36.5			—		36.5
General and administrative expense and other		16.8			—		16.8
Other income		(3.5	)		—		(3.5	)
Total operating costs and expenses		627.9			—		627.9
Operating income		53.3			—		53.3
Interest expense, net		(14.5	)		—		(14.5	)
Earnings from unconsolidated affiliates		14.5			6.3		20.8
Income before income taxes		53.3			6.3		59.6
Income tax expense		(0.4	)		—		(0.4	)
Net income		52.9			6.3		59.2
Net income attributable to noncontrolling interests		(1.1	)		—		(1.1	)
Net income attributable to partners	$	51.8		$	6.3	$	58.1

(a) The results of our 33.33% interest in Southeast Texas for the six months ended June 30, 2010 includes the impact of Hurricane Ike business interruption insurance recoveries.

(b) The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

:The results of operations for acquisitions accounted for as a business combination are included in the DCP Midstream Partners, LP results subsequent to the date of acquisition. Accordingly, for the three and six months ended June 30, 2011 total operating revenues of $5.3 million and $15.9 million, respectively, and net income attributable to the Partnership of $4.2 million and $7.7 million, respectively, associated with Marysville, are included in the condensed consolidated statement of operations. Pro forma information is presented for comparative periods prior to the date of acquisition, however, comparative periods in the condensed consolidated financial statements are not adjusted to include the results of the acquisition.

The following table presents unaudited pro forma information for the condensed consolidated statement of operations for the three and six months ended June 30, 2010, as if the acquisition of Marysville had occurred at the beginning of the period presented.

	Three Months Ended June 30, 2010								Six Months Ended June 30, 2010
	DCP Midstream Partners, LP			Acquisition of Marysville		DCP Midstream Partners, LP Pro Forma			DCP Midstream Partners, LP			Acquisition of Marysville		DCP Midstream Partners, LP Pro Forma
	(Millions, except per unit amounts)
Total operating revenues	$	277.5		$	6.2	$	283.7		$	681.2		$	14.8	$	696.0
Net income attributable to partners	$	25.8		$	2.3		28.1		$	58.1		$	6.3	$	64.4
Less:
Net loss (income) attributable to predecessor operations		0.2			—		0.2			(6.3	)		—		(6.3	)
General partner unitholders interest in net income		(4.2	)		—		(4.2	)		(8.0	)		—		(8.0	)
Net income allocable to limited partners	$	21.8		$	2.3	$	24.1		$	43.8		$	6.3	$	50.1
Net income per limited partner unit — basic and diluted	$	0.63		$	0.07	$	0.70		$	1.27		$	0.18	$	1.45

The pro forma information is not intended to reflect actual results that would have occurred if the acquired business had been combined during the period presented, nor is it intended to be indicative of the results of operations that may be achieved by us in the future.

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Income Taxes

6 Months Ended

Jun. 30, 2011

Income Taxes

Income Taxes

13. Income Taxes

We are structured as a master limited partnership, which is a pass-through entity for federal income tax purposes. On December 30, 2010, we acquired all of the interests in Marysville Hydrocarbons Holdings, LLC, an entity that owns a taxable C-Corporation consolidated return group. We estimated $35.0 million of deferred tax liabilities resulting from built-in tax gains recognized in the transaction and recorded this in our preliminary purchase price allocation as of December 31, 2010.

On January 4, 2011, we merged two wholly-owned subsidiaries of Marysville Hydrocarbons Holding, LLC and converted the combined entity's organizational structure from a corporation to a limited liability company. This conversion to a limited liability company triggered the deferred tax liabilities resulting from built-in tax gains to become currently payable. Accordingly, the estimated $35.0 million of deferred tax liabilities at December 31, 2010 became currently payable on January 4, 2011. On April 18, 2011, we made an estimated federal tax payment of $29.3 million related to our $35.0 million tax liability that resulted from our acquisition of Marysville. The remaining $5.7 million estimated tax payable is included in other current liabilities in our condensed consolidated balance sheet as of June 30, 2011.

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Debt (Debt) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2011		Dec. 31, 2010		Sep. 30, 2010
Debt outstanding under credit facility agreement	$ 461.0		$ 398.0
Unamortized discount	(0.2)
Total debt	710.8		647.8
Current maturities	(461.0)
Total long-term debt	249.8		647.8	[1]
Debt instrument, issuance date	September 30, 2010
Debt swapped to a fixed rate obligation	450.0
Net effective interest rate	4.31%
Revolving Credit Facility [Member]
Debt outstanding under credit facility agreement	461.0	[2]	398.0	[2]
Total long-term debt	461.0
Weighted-average variable interest rate	0.67%		1.14%
Net effective interest rate	4.31%		4.28%
Interest Rate Swap [Member]
Effective fixed rates higher range	5.19%
Effective fixed rates lower range	2.94%
Debt swapped to a fixed rate obligation	450.0
Credit Facility [Member]
Debt instrument due date	June 21, 2012
Senior Notes 3.25% [Member]
Notes Payable, Noncurrent	250.0		250.0
Unamortized discount	$ (0.2)		$ (0.2)		$ (0.2)
Interest payable semi-annually	3.25%
Debt instrument due date	October 1, 2015

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] $450.0 million of debt has been swapped to a fixed rate obligation with effective fixed rates ranging from 2.94% to 5.19%, for a net effective rate of 4.31% on the $461.0 million of outstanding debt under our revolving credit facility as of June 30, 2011.

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Fair Value Measurement (Condensed Consolidated Balance Sheets for Derivative Financial Instruments) (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Current Assets [Member]
Beginning balance	$ 0.2	[1]	$ 1.5		$ 0.3	[2]	$ 0.4
Net realized and unrealized (losses) gains included in earnings	0.5	[1]			0.5		1.0
Transfers into Level 3		[1],[3]		[3]		[2],[3]		[3]
Transfers out of Level 3		[1],[3]		[3]		[2],[3]		[3]
Settlements	(0.1)	[1]			(0.2)	[2]
Purchases, Issuances and Settlements net			(0.7)				(0.6)
Ending balance	0.6	[1],[2]	0.8		0.6	[1],[2]	0.8
Net unrealized gains (losses) still held included in earnings	0.5	[1],[4]	(0.1)	[4]	0.5	[2],[4]	0.7	[4]
Long-Term Assets [Member]
Beginning balance	0.2	[1]	1.2		0.3	[2]	0.2
Net realized and unrealized (losses) gains included in earnings	0.1	[1]	0.6				1.6
Transfers into Level 3		[1],[3]		[3]		[2],[3]		[3]
Transfers out of Level 3		[1],[3]		[3]		[2],[3]		[3]
Settlements		[1]				[2]
Purchases, Issuances and Settlements net
Ending balance	0.3	[1],[2]	1.8		0.3	[1],[2]	1.8
Net unrealized gains (losses) still held included in earnings	0.1	[1],[4]	0.7	[4]		[2],[4]	1.6	[4]
Current Liabilities [Member]
Beginning balance	(2.3)	[1]	(0.3)		(0.1)	[2]	(0.8)
Transfers into Level 3				[3]
Transfers out of Level 3				[3]
Ending balance			(0.1)				(0.1)
Net unrealized gains (losses) still held included in earnings	(0.2)	[1],[4]		[4]	(1.2)	[2],[4]		[4]
Beginning Balance	(1.2)	[1]			(1.2)	[2]	(0.1)
Net realized and unrealized (losses) gains included in earnings	(1.5)	[1]	0.2		(1.2)
Transfers into level 3 (liability)		[1],[3]				[2],[3]		[3]
Transfers out of level 3 (liability)	1.3	[1],[3]				[2],[3]		[3]
Purchases, Issuances and Settlements net (liability)	1.3	[1]			0.1	[2]	0.7
Ending Balance	(1.2)	[1]			(1.2)	[2]	(0.1)
Long-Term Liabilities [Member]
Beginning balance	(2.4)	[1]	(0.4)		(0.5)	[2]	(0.4)
Transfers into Level 3				[3]
Transfers out of Level 3				[3]
Ending balance			(0.2)				(0.2)
Net unrealized gains (losses) still held included in earnings	0.3	[1],[4]	0.1	[4]	0.1	[2],[4]	0.1	[4]
Beginning Balance	(0.3)	[1]			(0.3)	[2]	(0.2)
Net realized and unrealized (losses) gains included in earnings	0.6	[1]	0.2		(1.2)		0.2
Transfers into level 3 (liability)		[1],[3]				[2],[3]		[3]
Transfers out of level 3 (liability)	1.5	[1],[3]			1.4	[2],[3]		[3]
Purchases, Issuances and Settlements net (liability)		[1]				[2]
Ending Balance	$ (0.3)	[1]			$ (0.3)	[2]	$ (0.2)

[1] There were no purchases, issuances and sales for the three months ended June 30, 2011.

[2] There were no purchases, issuances and sales for the six months ended June 30, 2011.

[3] Amounts transferred in and amounts transferred out are reflected at fair value as of the end of the period.

[4] Represents the amount of total gains or losses for the period, included in gains or losses from commodity derivative activity, net, attributable to change in unrealized gains or losses relating to assets and liabilities classified as Level 3 that are still held as of June 30, 2011 and 2010.

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Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2011

Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Six Months Ended June 30,
	2011		2010
	(Millions)
Cash paid for interest:
Cash paid for interest, net of amounts capitalized	$	2.2	$	3.2
Cash paid for income taxes, net of income tax refunds	$	29.9	$	0.5
Non-cash investing and financing activities:
Property, plant and equipment acquired with accounts payable	$	3.0	$	3.2
Other non-cash additions of property, plant and equipment	$	0.1	$	0.2
Acquisition related contingent consideration	$	—	$	1.0
Non-cash change in parent advances	$	1.7	$	—
Non-cash distributions to DCP Midstream, LLC	$	2.6	$	—

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Risk Management and Hedging Activities (Schedule of Cash Flow Hedge Method of Accounting) (Details) (USD $) In Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011	Jun. 30, 2010
Interest Rate Swap [Member]
(Loss) Recognized in AOCI on Derivatives - Effective Portion	$ (3.3)	$ (5.8)		$ (4.2)	$ (13.4)
Loss Reclassified From AOCI to Earnings-Effective Portion	(5.1)	(5.6)	[1]	(10.3)	(11.2)	[1]
Gain (Loss) Recognized in Income on Derivatives-Ineffective Portion and Amount Excluded From Effectiveness Testing			[1],[2]			[1],[2]
Defferred Losses in AOCI Expected to be Reclassified into Earnings Over the Next 12 Months				(19.0)
Commodity Contract [Member]
(Loss) Recognized in AOCI on Derivatives - Effective Portion	(0.1)			(0.1)
Loss Reclassified From AOCI to Earnings-Effective Portion			[3]	(0.1)	(0.4)	[3]
Gain (Loss) Recognized in Income on Derivatives-Ineffective Portion and Amount Excluded From Effectiveness Testing			[2],[3]			[2],[3]
Defferred Losses in AOCI Expected to be Reclassified into Earnings Over the Next 12 Months				$ (0.1)

[1] Included in interest expense in our condensed consolidated statements of operations.

[2] For the three months ended June 30, 2011 and 2010, no derivative gains or losses were reclassified from AOCI to current period earnings as a result of the discontinuance of cash flow hedges related to certain forecasted transactions that are not probable of occurring.

[3] Included in sales of natural gas, propane, NGLs and condensate in our condensed consolidated statements of operations.

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Acquisitions (Tables)

6 Months Ended

Jun. 30, 2011

Acquisitions

Preliminary Purchase Price Allocation

	June 30,
	2011
	(Millions)
Aggregate consideration	$	100.8
Cash		3.1
Accounts receivable		0.7
Inventory		4.6
Other current assets		0.7
Property, plant and equipment		57.1
Intangible assets		33.0
Goodwill		39.7
Other long-term assets		1.2
Other current liabilities		(4.3	)
Long-term liabilities		(35.0	)
Total preliminary purchase price allocation	$	100.8

Disclosure of Operations

Three Months Ended June 30, 2010

	DCP Midstream Partners, LP (As previously reported)			Southeast Texas (a)			Combined DCP Midstream Partners, LP (As currently reported)
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	228.0		$	—		$	228.0
Transportation, processing and other		27.0			—			27.0
Gains from commodity derivative activity, net		22.5			—			22.5
Total operating revenues		277.5			—			277.5
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		205.7			—			205.7
Operating and maintenance expense		20.6			—			20.6
Depreciation and amortization expense		18.7			—			18.7
General and administrative expense and other		8.2			—			8.2
Other income		(3.5	)		—			(3.5	)
Total operating costs and expenses		249.7			—			249.7
Operating income		27.8			—			27.8
Interest expense, net		(7.3	)		—			(7.3	)
Earnings from unconsolidated affiliates		6.6			(0.2	)		6.4
Income before income taxes		27.1			(0.2	)		26.9
Income tax expense		(0.1	)		—			(0.1	)
Net income		27.0			(0.2	)		26.8
Net income attributable to noncontrolling interests		(1.0	)		—			(1.0	)
Net income attributable to partners	$	26.0		$	(0.2	)	$	25.8

(a) The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

Six Months Ended June 30, 2010

	DCP Midstream Partners, LP (As previously reported)			Southeast Texas (a)(b)		Combined DCP Midstream Partners, LP (As currently reported)
	(Millions)
Operating revenues:
Sales of natural gas, propane, NGLs and condensate	$	598.4		$	—	$	598.4
Transportation, processing and other		54.3			—		54.3
Gains from commodity derivative activity, net		28.5			—		28.5
Total operating revenues		681.2			—		681.2
Operating costs and expenses:
Purchases of natural gas, propane and NGLs		538.5			—		538.5
Operating and maintenance expense		39.6			—		39.6
Depreciation and amortization expense		36.5			—		36.5
General and administrative expense and other		16.8			—		16.8
Other income		(3.5	)		—		(3.5	)
Total operating costs and expenses		627.9			—		627.9
Operating income		53.3			—		53.3
Interest expense, net		(14.5	)		—		(14.5	)
Earnings from unconsolidated affiliates		14.5			6.3		20.8
Income before income taxes		53.3			6.3		59.6
Income tax expense		(0.4	)		—		(0.4	)
Net income		52.9			6.3		59.2
Net income attributable to noncontrolling interests		(1.1	)		—		(1.1	)
Net income attributable to partners	$	51.8		$	6.3	$	58.1

(a) The results of our 33.33% interest in Southeast Texas for the six months ended June 30, 2010 includes the impact of Hurricane Ike business interruption insurance recoveries.

(b) The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

Unaudited Pro Forma Information

	Three Months Ended June 30, 2010								Six Months Ended June 30, 2010
	DCP Midstream Partners, LP			Acquisition of Marysville		DCP Midstream Partners, LP Pro Forma			DCP Midstream Partners, LP			Acquisition of Marysville		DCP Midstream Partners, LP Pro Forma
	(Millions, except per unit amounts)
Total operating revenues	$	277.5		$	6.2	$	283.7		$	681.2		$	14.8	$	696.0
Net income attributable to partners	$	25.8		$	2.3		28.1		$	58.1		$	6.3	$	64.4
Less:
Net loss (income) attributable to predecessor operations		0.2			—		0.2			(6.3	)		—		(6.3	)
General partner unitholders interest in net income		(4.2	)		—		(4.2	)		(8.0	)		—		(8.0	)
Net income allocable to limited partners	$	21.8		$	2.3	$	24.1		$	43.8		$	6.3	$	50.1
Net income per limited partner unit — basic and diluted	$	0.63		$	0.07	$	0.70		$	1.27		$	0.18	$	1.45

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Condensed Consolidated Statements Of Comprehensive Income (USD $) In Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Comprehensive Income
Net income	$ 51.2	$ 26.8	[1]	$ 48.8	$ 59.2	[2]
Other comprehensive income (loss):
Reclassification of cash flow hedge losses into earnings	5.1	5.6		10.4	11.6
Net unrealized losses on cash flow hedges	(3.4)	(5.8)		(4.3)	(13.4)
Total other comprehensive income (loss)	1.7	(0.2)		6.1	(1.8)
Total comprehensive income (loss)	52.9	26.6		54.9	57.4
Total comprehensive income attributable to noncontrolling interests	(9.7)	(1.0)		(13.2)	(1.1)
Total comprehensive income attributable to partners	$ 43.2	$ 25.6		$ 41.7	$ 56.3

[1] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Net Income Or Loss Per Limited Partner Unit

6 Months Ended

Jun. 30, 2011

Net Income Or Loss Per Limited Partner Unit

Net Income Or Loss Per Limited Partner Unit

14. Net Income or Loss per Limited Partner Unit

Basic net income per limited partner unit is computed based on the weighted average number of units outstanding during the period. Diluted net income per limited partner unit is computed based on the weighted average number of units plus the effect of dilutive potential units outstanding during the period using the two-class method. Dilutive potential units include outstanding performance units, phantom units and restricted units. The dilutive effect of unit-based awards was 75,560 equivalent units and 55,105 equivalent units during the three and six month periods ended June 30, 2011, respectively. There were no dilutive unit-based awards in the three and six month periods ended June 30, 2010.

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Acquisitions (Disclosure of operations) (Details) (USD $) In Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Sales of natural gas, propane, NGLs and condensate	$ 323.1	$ 228.0	[1]	$ 752.8		$ 598.4	[2]
Transportation, processing and other	38.5	27.0	[1]	74.1		54.3	[2]
Gains from commodity derivative activity, net		22.5				28.5
Total operating revenues	374.2	277.5	[1]	799.3		681.2	[2]
Purchases of natural gas, propane and NGLs	274.3	205.7	[1]	649.3		538.5	[2]
Operating and maintenance expense	21.7	20.6		45.8		39.6
Depreciation and amortization expense	20.1	18.7	[1]	40.0		36.5	[2]
General and administrative expense and other	8.6	8.2		17.6		16.8
Other income		(3.5)				(3.5)
Total operating costs and expenses	324.6	249.7	[1]	752.5		627.9	[2]
Operating income	49.6	27.8	[1]	46.8		53.3	[2]
Interest expense	(8.4)	(7.3)	[1]	(16.4)		(14.5)	[2]
Earnings from unconsolidated affiliates	10.0	6.4	[1],[3]	18.6		20.8	[2],[3]
Income before income taxes	51.2	26.9	[1]	49.0		59.6	[2]
Income tax expense		(0.1)	[1],[4]	(0.2)	[4]	(0.4)	[2],[4]
Net income	51.2	26.8	[1]	48.8		59.2	[2]
Net income attributable to noncontrolling interests	(9.7)	(1.0)	[1]	(13.2)		(1.1)	[2]
Net income attributable to partners	41.5	25.8	[1]	35.6		58.1	[2]
DCP Midstream Partners, LP [Member] | Scenario, Previously Reported [Member]
Sales of natural gas, propane, NGLs and condensate		228.0				598.4
Transportation, processing and other		27.0				54.3
Gains from commodity derivative activity, net		22.5				28.5
Total operating revenues		277.5				681.2
Purchases of natural gas, propane and NGLs		205.7				538.5
Operating and maintenance expense		20.6				39.6
Depreciation and amortization expense		18.7				36.5
General and administrative expense and other		8.2				16.8
Other income		(3.5)				(3.5)
Total operating costs and expenses		249.7				627.9
Operating income		27.8				53.3
Interest expense		(7.3)				(14.5)
Earnings from unconsolidated affiliates		6.6				14.5
Income before income taxes		27.1				53.3
Income tax expense		(0.1)				(0.4)
Net income		27.0				52.9
Net income attributable to noncontrolling interests		(1.0)				(1.1)
Net income attributable to partners		26.0				51.8
DCP Midstream Partners, LP [Member]
Income before income taxes	41.5	25.8	[1]	35.6		58.1	[2]
Net income	41.5	25.8	[1]	35.6		58.1	[2]
Net income attributable to partners	41.5	25.8	[1]	35.6		58.1	[2]
Southeast Texas [Member]
Sales of natural gas, propane, NGLs and condensate			[5]
Transportation, processing and other			[5]
Gains from commodity derivative activity, net			[5]
Total operating revenues			[5]
Purchases of natural gas, propane and NGLs			[5]
Operating and maintenance expense			[5]
Depreciation and amortization expense			[5]
General and administrative expense and other			[5]
Other income			[5]
Total operating costs and expenses			[5]
Operating income			[5]
Interest expense			[5]
Earnings from unconsolidated affiliates		(0.2)	[5]			6.3	[5],[6]
Income before income taxes		(0.2)	[5]			6.3	[5],[6]
Income tax expense			[5]
Net income		(0.2)	[5]			6.3	[5],[6]
Net income attributable to noncontrolling interests			[5]
Net income attributable to partners		$ (0.2)	[5]			$ 6.3	[5],[6]

[1] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[3] As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

[4] Income tax expense relates primarily to the Texas margin tax and the Michigan business tax.

[5] The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

[6] The results of our 33.33% interest in Southeast Texas for the six months ended June 30, 2010 includes the impact of Hurricane Ike business interruption insurance recoveries.

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Business Segments

6 Months Ended

Jun. 30, 2011

Business Segments

Business Segments

16. Business Segments

Our operations are located in the United States and are organized into three reporting segments: (1) Natural Gas Services; (2) Wholesale Propane Logistics; and (3) NGL Logistics.

Natural Gas Services — Our Natural Gas Services segment provides services that include gathering, compressing, treating, processing, fractionating, transporting and storing natural gas. The segment consists of our Northern Louisiana system, our Southern Oklahoma system, our Wyoming system, our Michigan system, our 33.33% interest in the Southeast Texas system, our 50.1% interest in the East Texas system, our 75% interest in the Colorado system, and our 40% limited liability company interest in Discovery.

Wholesale Propane Logistics — Our Wholesale Propane Logistics segment provides services that include the receipt of propane by pipeline, rail or ship to our terminals that deliver the product to retail distributors. The segment consists of six owned rail terminals, one owned marine import terminal, one leased marine terminal, one pipeline terminal and access to several open-access pipeline terminals.

NGL Logistics — Our NGL Logistics segment provides services that include transportation, storage and fractionation of NGLs. The segment consists of the Seabreeze and Wilbreeze intrastate NGL pipelines, the Wattenberg and Black Lake interstate NGL pipelines, the NGL storage facility in Michigan and the DJ Basin NGL Fractionators in Colorado.

These segments are monitored separately by management for performance against our internal forecast and are consistent with internal financial reporting. These segments have been identified based on the differing products and services, regulatory environment and the expertise required for these operations. Gross margin is a performance measure utilized by management to monitor the business of each segment.

The following tables set forth our segment information:

	Three Months Ended June 30, 2011
	Natural  Gas Services			Wholesale Propane Logistics			NGL Logistics			Other			Eliminations (f)		Total
	(Millions)
Total operating revenue	$	257.4		$	104.2		$	12.6		$	—		$	—	$	374.2
Total purchases		(176.3	)		(98.0	)		—			—			—		(274.3	)
Gross margin (a)	$	81.1		$	6.2		$	12.6		$	—		$	—	$	99.9
Operating and maintenance expense		(15.7	)		(4.2	)		(1.8	)		—			—		(21.7	)
Depreciation and amortization expense		(17.4	)		(0.7	)		(2.0	)		—			—		(20.1	)
General and administrative expense		—			—			—			(8.6	)		—		(8.6	)
Other income		—			—			0.1			—			—		0.1
Earnings from unconsolidated affiliates		10.0			—			—			—			—		10.0
Interest expense		—			—			—			(8.4	)		—		(8.4	)
Income tax expense (b)		—			—			—			—			—		—
Net income (loss)		58.0			1.3			8.9			(17.0	)		—		51.2
Net income attributable to noncontrolling interests		(9.7	)		—			—			—			—		(9.7	)
Net income (loss) attributable to partners	$	48.3		$	1.3		$	8.9		$	(17.0	)	$	—	$	41.5
Non-cash derivative mark-to-market (c)	$	22.3		$	(0.5	)	$	—		$	(0.8	)	$	—	$	21.0
Capital expenditures	$	12.6		$	0.9		$	2.0		$	—		$	—	$	15.5

	Three Months Ended June 30, 2010
	Natural Gas Services (e)			Wholesale Propane Logistics			NGL Logistics			Other			Total
	(Millions)
Total operating revenue	$	211.7		$	62.2		$	3.6		$	—		$	277.5
Total purchases		(141.5	)		(63.1	)		(1.1	)		—			(205.7	)
Gross margin (a)	$	70.2		$	(0.9	)	$	2.5		$	—		$	71.8
Operating and maintenance expense		(17.0	)		(2.6	)		(1.0	)		—			(20.6	)
Depreciation and amortization expense		(17.8	)		(0.3	)		(0.6	)		—			(18.7	)
General and administrative expense		—			—			—			(8.2	)		(8.2	)
Other income		0.5			3.0			—			—			3.5
Earnings from unconsolidated affiliates		6.1			—			0.3			—			6.4
Interest expense		—			—			—			(7.3	)		(7.3	)
Income tax expense (b)		—			—			—			(0.1	)		(0.1	)
Net income (loss)		42.0			(0.8	)		1.2			(15.6	)		26.8
Net income attributable to noncontrolling interests		(1.0	)		—			—			—			(1.0	)
Net income (loss) attributable to partners	$	41.0		$	(0.8	)	$	1.2		$	(15.6	)	$	25.8
Non-cash derivative mark-to-market (c)	$	22.3		$	—		$	—		$	0.2		$	22.5
Capital expenditures	$	11.2		$	—		$	2.0		$	—		$	13.2

	Six Months Ended June 30, 2011
	Natural  Gas Services			Wholesale Propane Logistics			NGL Logistics			Other			Eliminations (f)			Total
	(Millions)
Total operating revenue	$	421.9		$	352.0		$	27.6		$	—		$	(2.2	)	$	799.3
Total purchases		(322.8	)		(324.0	)		(4.7	)		—			2.2			(649.3	)
Gross margin (a)	$	99.1		$	28.0		$	22.9		$	—		$	—		$	150.0
Operating and maintenance expense		(32.2	)		(7.8	)		(5.8	)		—			—			(45.8	)
Depreciation and amortization expense		(34.9	)		(1.4	)		(3.7	)		—			—			(40.0	)
General and administrative expense		—			—			—			(17.6	)		—			(17.6	)
Other income		—			—			0.2			—			—			0.2
Earnings from unconsolidated affiliates		18.6			—			—			—			—			18.6
Interest expense		—			—			—			(16.4	)		—			(16.4	)
Income tax expense (b)		—			—			—			(0.2	)		—			(0.2	)
Net income (loss)		50.6			18.8			13.6			(34.2	)		—			48.8
Net income attributable to noncontrolling interests		(13.2	)		—			—			—			—			(13.2	)
Net income (loss) attributable to partners	$	37.4		$	18.8		$	13.6		$	(34.2	)	$	—		$	35.6
Non-cash derivative mark-to-market (c)	$	(11.1	)	$	(0.8	)	$	—		$	(1.0	)	$	—		$	(12.9	)
Capital expenditures	$	21.4		$	1.5		$	6.3		$	—		$	—		$	29.2
Acquisition expenditures	$	121.8		$	—		$	29.6		$	—		$	—		$	151.4

	Six Months Ended June 30, 2010
	Natural Gas Services (e)			Wholesale Propane Logistics			NGL Logistics			Other			Total
	(Millions)
Total operating revenue	$	429.8		$	243.0		$	8.4		$	—		$	681.2
Total purchases		(305.8	)		(230.2	)		(2.5	)		—			(538.5	)
Gross margin (a)	$	124.0		$	12.8		$	5.9		$	—		$	142.7
Operating and maintenance expense		(33.2	)		(5.2	)		(1.2	)		—			(39.6	)
Depreciation and amortization expense		(34.8	)		(0.6	)		(1.1	)		—			(36.5	)
General and administrative expense		—			—			—			(16.8	)		(16.8	)
Other income		0.5			3.0			—			—			3.5
Earnings from unconsolidated affiliates		20.0			—			0.8			—			20.8
Interest expense		—			—			—			(14.5	)		(14.5	)
Income tax expense (b)		—			—			—			(0.4	)		(0.4	)
Net income (loss)		76.5			10.0			4.4			(31.7	)		59.2
Net income attributable to noncontrolling interests		(1.1	)		—			—			—			(1.1	)
Net income (loss) attributable to partners	$	75.4		$	10.0		$	4.4		$	(31.7	)	$	58.1
Non-cash derivative mark-to-market (c)	$	30.7		$	(0.6	)	$	—		$	0.2		$	30.3
Capital expenditures	$	23.3		$	—		$	2.1		$	—		$	25.4
Acquisitions, net of cash acquired	$	—		$	—		$	22.0		$	—		$	22.0
Investments in unconsolidated affiliates	$	0.7		$	—		$	—		$	—		$	0.7

	June 30, 2011		December 31, 2010
	(Millions)
Segment long-term assets:
Natural Gas Services (e)	$	1,247.2	$	1,253.7
Wholesale Propane Logistics		102.3		101.7
NGL Logistics		252.5		221.7
Other (d)		4.7		4.1
Total long-term assets		1,606.7		1,581.2
Current assets		188.3		232.0
Total assets	$	1,795.0	$	1,813.2

(a) Gross margin consists of total operating revenues, including commodity derivative activity, less purchases of natural gas, propane, NGLs and condensate. Gross margin is viewed as a non-GAAP measure under the rules of the SEC, but is included as a supplemental disclosure because it is a primary performance measure used by management as it represents the results of product sales versus product purchases. As an indicator of our operating performance, gross margin should not be considered an alternative to, or more meaningful than, net income or cash flow as determined in accordance with GAAP. Our gross margin may not be comparable to a similarly titled measure of another company because other entities may not calculate gross margin in the same manner.

(b) Income tax expense relates primarily to the Texas margin tax and the Michigan business tax.

(c) Non-cash derivative mark-to-market is included in segment gross margin, along with cash settlements for our derivative contracts.

(d) Other long-term assets not allocable to segments consist of unrealized gains on derivative instruments, corporate leasehold improvements and other long-term assets.

(e) The segment information for the three and six months ended June 30, 2010 and as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

(f) Represents intersegment revenues consisting of sales of NGLs by Marysville in our NGL Logistics business to our Wholesale Propane business.

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Risk Management and Hedging Activities (Schedule of Net Long of Short Positions Expected to be Realized) (Details)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Crude Oil [Member]
2010		(490,360)
2011	(178,281)	(949,000)
2012	(1,021,587)	(777,750)
2013	(941,998)	(748,250)
2014	(547,500)	(456,250)
2015	(365,000)	(182,500)
2016	(183,000)
Natural Gas [Member]
2010		(1,110,100)
2011	(382,600)	(985,500)
2012	(366,000)	(988,200)
2013	(365,000)	(584,000)
2014	(365,000)
Natural Gas Liquids [Member]
2011	(633,195)

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Risk Management and Hedging Activities (Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Total AOCI	$ (22.5)	$ (27.7)	[1]
Cash Flow Hedge [Member]
Total AOCI	(22.5)	(27.7)
Cash Flow Hedge [Member] | Interest Rate Contract [Member]
Net deferred losses in AOCI	(21.3)	(27.4)
Cash Flow Hedge [Member] | Commodity Contract [Member]
Net deferred losses in AOCI	$ (1.2)	$ (0.3)

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Condensed Consolidated Statements Of Changes in Equity (USD $) In Millions	Predecessor [Member]	Predecessor [Member]	Successor [Member] Common Unitholders [Member]	Successor [Member] General Partner [Member]	Successor [Member] Noncontrolling Interests [Member]	Successor [Member]	Predecessor [Member]	Common Unitholders [Member]	General Partner [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2009							$ 70.8	$ 415.5	$ (5.9)	$ (31.9)	$ 227.7	$ 676.2
Net change in parent advances							25.3					25.3
Purchase of additional interest in a subsidiary								1.0			(5.5)	(4.5)
Distributions to unitholders and general partner								(41.5)	(7.6)			(49.1)	[1]
Distributions to noncontrolling interests											(8.2)	(8.2)	[1]
Contributions from noncontrolling interests											9.1	9.1	[1]
Comprehensive income (loss):
Net income attributable to predecessor operations	6.3	6.3
Net income			44.1	7.7	1.1	52.9						59.2	[1]
Reclassification of cash flow hedge losses into earnings										11.6		11.6
Net unrealized losses on cash flow hedges										(13.4)		(13.4)
Total comprehensive income (loss)							6.3	44.1	7.7	(1.8)	1.1	57.4
Balance at Jun. 30, 2010							102.4	419.1	(5.8)	(33.7)	224.2	706.2
Balance at Dec. 31, 2010							112.6	552.2	(6.4)	(27.7)	220.1	850.8	[2]
Net change in parent advances							1.7					1.7
Acquisition of Southeast Texas							(114.3)					(114.3)
Excess purchase price over acquired assets								(34.8)		(0.9)		(35.7)
Issuance of 3,596,636 common units								139.7				139.7
Equity-based compensation								2.3				2.3
Distributions to DCP Midstream, LLC								(2.6)				(2.6)
Distributions to unitholders and general partner								(52.5)	(10.9)			(63.4)
Distributions to noncontrolling interests											(15.8)	(15.8)
Contributions from noncontrolling interests											5.6	5.6
Comprehensive income (loss):
Net income								23.9	11.7		13.2	48.8
Reclassification of cash flow hedge losses into earnings										10.4		10.4
Net unrealized losses on cash flow hedges										(4.3)		(4.3)
Total comprehensive income (loss)								23.9	11.7	6.1	13.2	54.9
Balance at Jun. 30, 2011								$ 628.2	$ (5.6)	$ (22.5)	$ 223.1	$ 823.2

[1] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Fair Value Measurement

6 Months Ended

Jun. 30, 2011

Fair Value Measurement

Fair Value Measurement

8. Fair Value Measurement

Determination of Fair Value

Below is a general description of our valuation methodologies for derivative financial assets and liabilities which are measured at fair value. Fair values are generally based upon quoted market prices, where available. If listed market prices or quotes are not available, we determine fair value based upon a market quote, adjusted by other market-based or independently sourced market data such as historical commodity volatilities, crude oil future yield curves, and/or counterparty specific considerations. These adjustments result in a fair value for each asset or liability under an "exit price" methodology, in line with how we believe a marketplace participant would value that asset or liability. These adjustments may include amounts to reflect counterparty credit quality, the effect of our own creditworthiness, the time value of money and/or the liquidity of the market.

• Counterparty credit valuation adjustments are necessary when the market price of an instrument is not indicative of the fair value as a result of the credit quality of the counterparty. Generally, market quotes assume that all counterparties have near zero, or low, default rates and have equal credit quality. Therefore, an adjustment may be necessary to reflect the credit quality of a specific counterparty to determine the fair value of the instrument. We record counterparty credit valuation adjustments on all derivatives that are in a net asset position as of the measurement date in accordance with our established counterparty credit policy, which takes into account any collateral margin that a counterparty may have posted with us as well as any letters of credit that they have provided.

• Entity valuation adjustments are necessary to reflect the effect of our own credit quality on the fair value of our net liability position with each counterparty. This adjustment takes into account any credit enhancements, such as collateral margin we may have posted with a counterparty, as well as any letters of credit that we have provided. The methodology to determine this adjustment is consistent with how we evaluate counterparty credit risk, taking into account our own credit rating, current credit spreads, as well as any change in such spreads since the last measurement date.

• Liquidity valuation adjustments are necessary when we are not able to observe a recent market price for financial instruments that trade in less active markets for the fair value to reflect the cost of exiting the position. Exchange traded contracts are valued at market value without making any additional valuation adjustments and, therefore, no liquidity reserve is applied. For contracts other than exchange traded instruments, we mark our positions to the midpoint of the bid/ask spread, and record a liquidity reserve based upon our total net position. We believe that such practice results in the most reliable fair value measurement as viewed by a market participant.

We manage our derivative instruments on a portfolio basis and the valuation adjustments described above are calculated on this basis. We believe that the portfolio level approach represents the highest and best use for these assets as there are benefits inherent in naturally offsetting positions within the portfolio at any given time, and this approach is consistent with how a market participant would view and value the assets and liabilities. Although we take a portfolio approach to managing these assets/liabilities, in order to reflect the fair value of any one individual contract within the portfolio, we allocate all valuation adjustments down to the contract level, to the extent deemed necessary, based upon either the notional contract volume, or the contract value, whichever is more applicable.

The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While we believe that our valuation methods are appropriate and consistent with other market participants, we recognize that the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. We review our fair value policies on a regular basis taking into consideration changes in the marketplace and, if necessary, will adjust our policies accordingly. See Note 10 Risk Management and Hedging Activities.

Valuation Hierarchy

Our fair value measurements are grouped into a three-level valuation hierarchy. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows.

• Level 1 — inputs are unadjusted quoted prices for identical assets or liabilities in active markets.

• Level 2 — inputs include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.

• Level 3 — inputs are unobservable and considered significant to the fair value measurement.

A financial instrument's categorization within the hierarchy is based upon the input that requires the highest degree of judgment in the determination of the instrument's fair value. Following is a description of the valuation methodologies used as well as the general classification of such instruments pursuant to the hierarchy.

Commodity Derivative Assets and Liabilities

We enter into a variety of derivative financial instruments, which may include over the counter, or OTC, instruments, such as natural gas, crude oil or NGL contracts.

Within our Natural Gas Services segment we typically use OTC derivative contracts in order to mitigate a portion of our exposure to natural gas, NGL and condensate price changes. We also may enter into natural gas derivatives to lock in margin around our storage and transportation assets. These instruments are generally classified as Level 2. Depending upon market conditions and our strategy, we may enter into OTC derivative positions with a significant time horizon to maturity, and market prices for these OTC derivatives may only be readily observable for a portion of the duration of the instrument. In order to calculate the fair value of these instruments, readily observable market information is utilized to the extent that it is available; however, in the event that readily observable market data is not available, we may interpolate or extrapolate based upon observable data. In instances where we utilize an interpolated or extrapolated value, and it is considered significant to the valuation of the contract as a whole, we would classify the instrument within Level 3.

Within our Wholesale Propane Logistics segment, we may enter into a variety of financial instruments to either secure sales or purchase prices, or capture a variety of market opportunities. Since financial instruments for NGLs tend to be counterparty and location specific, we primarily use the OTC derivative instrument markets, which are not as active and liquid as exchange traded instruments. Market quotes for such contracts may only be available for short dated positions (up to six months), and an active market itself may not exist beyond such time horizon. Contracts entered into with a relatively short time horizon for which prices are readily observable in the OTC market are generally classified within Level 2. Contracts with a longer time horizon, for which we internally generate a forward curve to value such instruments, are generally classified within Level 3. The internally generated curve may utilize a variety of assumptions including, but not limited to, historical and future expected relationship of NGL prices to crude oil prices, the knowledge of expected supply sources coming on line, expected weather trends within certain regions of the United States, and the future expected demand for NGLs.

Each instrument is assigned to a level within the hierarchy at the end of each financial quarter depending upon the extent to which the valuation inputs are observable. Generally, an instrument will move toward a level within the hierarchy that requires a lower degree of judgment as the time to maturity approaches, and as the markets in which the asset trades will likely become more liquid and prices more readily available in the market, thus reducing the need to rely upon our internally developed assumptions. However, the level of a given instrument may change, in either direction, depending upon market conditions and the availability of market observable data.

Interest Rate Derivative Assets and Liabilities

We use interest rate swap agreements as part of our overall capital strategy. These instruments effectively exchange a portion of our floating rate debt for fixed rate debt. The swaps are generally priced based upon a London Interbank Offered Rate, or LIBOR, instrument with similar duration, adjusted by the credit spread between our company and the LIBOR instrument. Given that a portion of the swap value is derived from the credit spread, which may be observed by comparing similar assets in the market, these instruments are classified within Level 2. Default risk on either side of the swap transaction is also considered in the valuation. We record counterparty credit and entity valuation adjustments in the valuation of our interest rate swaps; however, these reserves are not considered to be a significant input to the overall valuation.

Nonfinancial Assets and Liabilities

We utilize fair value on a non-recurring basis to perform impairment tests as required on our property, plant and equipment, goodwill and intangible assets. Assets and liabilities acquired in business combinations are recorded at their fair value as of the date of acquisition. The inputs used to determine such fair value are primarily based upon internally developed cash flow models and would generally be classified within Level 3, in the event that we were required to measure and record such assets at fair value within our condensed consolidated financial statements. Additionally, we use fair value to determine the inception value of our asset retirement obligations. The inputs used to determine such fair value are primarily based upon costs incurred historically for similar work, as well as estimates from independent third parties for costs that would be incurred to restore leased property to the contractually stipulated condition, and would generally be classified within Level 3.

We utilize fair value on a recurring basis to measure our contingent consideration that is a result of certain acquisitions. The inputs used to determine such fair value are primarily based upon internally developed cash flow models and are classified within Level 3.

The following table presents the financial instruments carried at fair value as of June 30, 2011 and December 31, 2010, by consolidated balance sheet caption and by valuation hierarchy as described above:

	June 30, 2011											December 31, 2010
	Level 1		Level 2			Level 3			Total Carrying Value			Level 1		Level 2			Level 3			Total Carrying Value
	(Millions)
Current assets:
Commodity derivatives (a)	$	—	$	0.7		$	0.6		$	1.3		$	—	$	1.6		$	0.3		$	1.9
Long-term assets:
Commodity derivatives (b)	$	—	$	1.4		$	0.3		$	1.7		$	—	$	1.1		$	0.3		$	1.4
Current liabilities (c):
Commodity derivatives	$	—	$	(28.6	)	$	(1.2	)	$	(29.8	)	$	—	$	(25.9	)	$	(0.1	)	$	(26.0	)
Interest rate derivatives	$	—	$	(17.2	)	$	—		$	(17.2	)	$	—	$	(17.0	)	$	—		$	(17.0	)
Long-term liabilities (d):
Commodity derivatives	$	—	$	(47.8	)	$	(0.3	)	$	(48.1	)	$	—	$	(39.9	)	$	(0.5	)	$	(40.4	)
Interest rate derivatives	$	—	$	(4.5	)	$	—		$	(4.5	)	$	—	$	(9.9	)	$	—		$	(9.9	)

(a) Included in current unrealized gains on derivative instruments in our condensed consolidated balance sheets.

(b) Included in long-term unrealized gains on derivative instruments in our condensed consolidated balance sheets.

(c) Included in current unrealized losses on derivative instruments in our condensed consolidated balance sheets.

(d) Included in long-term unrealized losses on derivative instruments in our condensed consolidated balance sheets.

Changes in Level 3 Fair Value Measurements

The tables below illustrate a rollforward of the amounts included in our condensed consolidated balance sheets for derivative financial instruments that we have classified within Level 3. The determination to classify a financial instrument within Level 3 is based upon the significance of the unobservable factors used in determining the overall fair value of the instrument. Since financial instruments classified as Level 3 typically include a combination of observable components (that is, components that are actively quoted and can be validated to external sources) and unobservable components, the gains and losses in the table below may include changes in fair value due in part to observable market factors, or changes to our assumptions on the unobservable components. Depending upon the information readily observable in the market, and/or the use of unobservable inputs, which are significant to the overall valuation, the classification of any individual financial instrument may differ from one measurement date to the next. In the event that there is a movement to/from the classification of an instrument as Level 3, we have reflected such items in the table below within the "Transfers into Level 3" and "Transfers out of Level 3" captions.

We manage our overall risk at the portfolio level, and in the execution of our strategy, we may use a combination of financial instruments, which may be classified within any level. Since Level 1 and Level 2 risk management instruments are not included in the rollforward below, the gains or losses in the table do not reflect the effect of our total risk management activities.

	Commodity Derivative Instruments
	Current Assets			Long-Term Assets		Current Liabilities			Long-Term Liabilities
	(Millions)
Three months ended June 30, 2011 (a):
Beginning balance	$	0.2		$	0.2	$	(2.3	)	$	(2.4	)
Net realized and unrealized gains (losses) included in earnings		0.5			0.1		(1.5	)		0.6
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		1.3			1.5
Settlements		(0.1	)		—		1.3			—
Ending balance	$	0.6		$	0.3	$	(1.2	)	$	(0.3	)
Net unrealized losses still held included in earnings (c)	$	0.5		$	0.1	$	(0.2	)	$	0.3
Three months ended June 30, 2010:
Beginning balance	$	1.5		$	1.2	$	(0.3	)	$	(0.4	)
Net realized and unrealized gains included in earnings		—			0.6		0.2			0.2
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			—
Purchases, Issuances and Settlements, net		(0.7	)		—		—			—
Ending balance	$	0.8		$	1.8	$	(0.1	)	$	(0.2	)
Net unrealized gains still held included in earnings (c)	$	(0.1	)	$	0.7	$	—		$	0.1

(a)    There were no purchases, issuances and sales for the three months ended June 30, 2011.

(b)    Amounts transferred in and amounts transferred out are reflected at fair value as of the end of the period.

(c)    Represents the amount of total gains or losses for the period, included in gains or losses from commodity derivative activity, net, attributable to change in unrealized gains or losses relating to assets and liabilities classified as Level 3 that are still held as of June 30, 2011 and 2010.

	Commodity Derivative Instruments
	Current Assets			Long-Term Assets		Current Liabilities			Long-Term Liabilities
	(Millions)
Six months ended June 30, 2011 (a):
Beginning balance	$	0.3		$	0.3	$	(0.1	)	$	(0.5	)
Net realized and unrealized gains (losses) included in earnings		0.5			—		(1.2	)		(1.2	)
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			1.4
Settlements		(0.2	)		—		0.1			—
Ending balance	$	0.6		$	0.3	$	(1.2	)	$	(0.3	)
Net unrealized gains still held included in earnings (c)	$	0.5		$	—	$	(1.2	)	$	0.1
Six months ended June 30, 2010:
Beginning balance	$	0.4		$	0.2	$	(0.8	)	$	(0.4	)
Net realized and unrealized gains included in earnings		1.0			1.6		—			0.2
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			—
Purchases, Issuances and Settlements, net		(0.6	)		—		0.7			—
Ending balance	$	0.8		$	1.8	$	(0.1	)	$	(0.2	)
Net unrealized losses still held included in earnings (c)	$	0.7		$	1.6	$	—		$	0.1

(a) There were no purchases, issuances and sales for the six months ended June 30, 2011.

(b) Amounts transferred in and amounts transferred out are reflected at fair value as of the end of the period.

(c) Represents the amount of total gains or losses for the period, included in gains or losses from commodity derivative activity, net, attributable to change in unrealized gains or losses relating to assets and liabilities classified as Level 3 that are still held as of June 30, 2011 and 2010.

During the six months ended June 30, 2010, we recognized the fair value of our contingent consideration, which is classified as Level 3, in relation to our acquisition of an additional 5% interest in Collbran, from Delta Petroleum Corporation of approximately $0.5 million, which we recorded to other current liabilities in our condensed consolidated balance sheet.

During the three and six months ended June 30, 2011, we had no significant transfers into and out of Levels 1 and 2. To qualify as a transfer, the asset or liability must have existed in the previous reporting period and moved into a different level during the current period.

Estimated Fair Value of Financial Instruments

We have determined fair value amounts using available market information and appropriate valuation methodologies. However, considerable judgment is required in interpreting market data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts that we could realize in a current market exchange. The use of different market assumptions and/or estimation methods may have a material effect on the estimated fair value amounts.

The fair value of accounts receivable and accounts payable are not materially different from their carrying amounts because of the short-term nature of these instruments or the stated rates approximating market rates. Unrealized gains and unrealized losses on derivative instruments are carried at fair value. The carrying and fair values of outstanding balances under our Credit Agreement are $461.0 million, and $455.3 million, respectively, as of June 30, 2011, and $398.0 million and $388.9 million, respectively, as of December 31, 2010. The carrying and fair values of our 3.25% Senior Notes are $250.0 million and $251.1 million, respectively, as of June 30, 2011 and $250.0 million and $247.0 million, respectively, as of December 31, 2010. We determine the fair value of our credit facility borrowings based upon the discounted present value of expected future cash flows, taking into account the difference between the contractual borrowing spread and the spread for similar credit facilities available in the marketplace. We determine the fair value of our fixed rate debt based on quotes obtained from bond dealers.

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Goodwill and Intangible Assets (Estimated Future Amortization of Intangible Assets) (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011
Goodwill and Intangible Assets
Remainder of 2011	$ 3.1
2012	6.0
2013	6.0
2014	6.0
2015	6.0
Thereafter	89.9
Total	$ 117.0

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Investments in Unconsolidated Affiliates (Summary of Income Statement Information) (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Investments in Unconsolidated Affiliates
Operating revenue	$ 233.1	[1]	$ 215.8	[2]	$ 493.0	[1]	$ 518.4	[2]
Operating expenses	210.9	[1]	201.6	[2]	451.0	[1]	466.3	[2]
Net income	$ 22.1	[1]	$ 14.2	[2]	$ 41.7	[1]	$ 52.2	[2]

[1] The combined financial information excludes the results of Black Lake, since we began accounting for Black Lake as a consolidated subsidiary effective July 30, 2010.

[2] The combined financial information for the three and six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Risk Management and Hedging Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Unrealized losses on derivative instruments - current	$ (47.0)	$ (43.0)
Unrealized losses on derivative instruments - long-term	(52.6)	(50.3)
Commodity Contract [Member] | Nondesignated [Member]
Unrealized gains on derivative instruments - current	1.3	1.9
Unrealized gains on derivative instruments - long-term	1.7	1.4
Derivative assets not designated as hedging instruments, fair value, total	3.0	3.3
Unrealized losses on derivative instruments - current	(29.8)	(26.0)
Unrealized losses on derivative instruments - long-term	(48.1)	(40.4)
Derivative liabilities, fair value, total	(77.9)	(66.4)
Nondesignated [Member] | Interest Rate Swap [Member]
Unrealized gains on derivative instruments - current
Unrealized gains on derivative instruments - long-term
Derivative assets not designated as hedging instruments, fair value, total
Unrealized losses on derivative instruments - current	(0.9)	(4.8)
Unrealized losses on derivative instruments - long-term		(4.5)
Derivative liabilities, fair value, total	(0.9)	(9.3)
Designated As Hedging Instrument [Member] | Interest Rate Swap [Member]
Unrealized gains on derivative instruments - current
Unrealized gains on derivative instruments - long-term
Derivative assets, fair value, total
Unrealized losses on derivative instruments - current	(16.3)	(12.2)
Unrealized losses on derivative instruments - long-term	(4.5)	(5.4)
Derivative liabilities, fair value, total	$ (20.8)	$ (17.6)

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Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value Measurement

Financial Instruments Carried at Fair Value

	June 30, 2011											December 31, 2010
	Level 1		Level 2			Level 3			Total Carrying Value			Level 1		Level 2			Level 3			Total Carrying Value
	(Millions)
Current assets:
Commodity derivatives (a)	$	—	$	0.7		$	0.6		$	1.3		$	—	$	1.6		$	0.3		$	1.9
Long-term assets:
Commodity derivatives (b)	$	—	$	1.4		$	0.3		$	1.7		$	—	$	1.1		$	0.3		$	1.4
Current liabilities (c):
Commodity derivatives	$	—	$	(28.6	)	$	(1.2	)	$	(29.8	)	$	—	$	(25.9	)	$	(0.1	)	$	(26.0	)
Interest rate derivatives	$	—	$	(17.2	)	$	—		$	(17.2	)	$	—	$	(17.0	)	$	—		$	(17.0	)
Long-term liabilities (d):
Commodity derivatives	$	—	$	(47.8	)	$	(0.3	)	$	(48.1	)	$	—	$	(39.9	)	$	(0.5	)	$	(40.4	)
Interest rate derivatives	$	—	$	(4.5	)	$	—		$	(4.5	)	$	—	$	(9.9	)	$	—		$	(9.9	)

(a) Included in current unrealized gains on derivative instruments in our condensed consolidated balance sheets.

(b) Included in long-term unrealized gains on derivative instruments in our condensed consolidated balance sheets.

(c) Included in current unrealized losses on derivative instruments in our condensed consolidated balance sheets.

(d) Included in long-term unrealized losses on derivative instruments in our condensed consolidated balance sheets.

Condensed Consolidated Balance Sheets for Derivative Financial Instruments

	Commodity Derivative Instruments
	Current Assets			Long-Term Assets		Current Liabilities			Long-Term Liabilities
	(Millions)
Three months ended June 30, 2011 (a):
Beginning balance	$	0.2		$	0.2	$	(2.3	)	$	(2.4	)
Net realized and unrealized gains (losses) included in earnings		0.5			0.1		(1.5	)		0.6
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		1.3			1.5
Settlements		(0.1	)		—		1.3			—
Ending balance	$	0.6		$	0.3	$	(1.2	)	$	(0.3	)
Net unrealized losses still held included in earnings (c)	$	0.5		$	0.1	$	(0.2	)	$	0.3
Three months ended June 30, 2010:
Beginning balance	$	1.5		$	1.2	$	(0.3	)	$	(0.4	)
Net realized and unrealized gains included in earnings		—			0.6		0.2			0.2
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			—
Purchases, Issuances and Settlements, net		(0.7	)		—		—			—
Ending balance	$	0.8		$	1.8	$	(0.1	)	$	(0.2	)
Net unrealized gains still held included in earnings (c)	$	(0.1	)	$	0.7	$	—		$	0.1

(a)    There were no purchases, issuances and sales for the three months ended June 30, 2011.

(b)    Amounts transferred in and amounts transferred out are reflected at fair value as of the end of the period.

(c)    Represents the amount of total gains or losses for the period, included in gains or losses from commodity derivative activity, net, attributable to change in unrealized gains or losses relating to assets and liabilities classified as Level 3 that are still held as of June 30, 2011 and 2010.

	Commodity Derivative Instruments
	Current Assets			Long-Term Assets		Current Liabilities			Long-Term Liabilities
	(Millions)
Six months ended June 30, 2011 (a):
Beginning balance	$	0.3		$	0.3	$	(0.1	)	$	(0.5	)
Net realized and unrealized gains (losses) included in earnings		0.5			—		(1.2	)		(1.2	)
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			1.4
Settlements		(0.2	)		—		0.1			—
Ending balance	$	0.6		$	0.3	$	(1.2	)	$	(0.3	)
Net unrealized gains still held included in earnings (c)	$	0.5		$	—	$	(1.2	)	$	0.1
Six months ended June 30, 2010:
Beginning balance	$	0.4		$	0.2	$	(0.8	)	$	(0.4	)
Net realized and unrealized gains included in earnings		1.0			1.6		—			0.2
Transfers into Level 3 (b)		—			—		—			—
Transfers out of Level 3 (b)		—			—		—			—
Purchases, Issuances and Settlements, net		(0.6	)		—		0.7			—
Ending balance	$	0.8		$	1.8	$	(0.1	)	$	(0.2	)
Net unrealized losses still held included in earnings (c)	$	0.7		$	1.6	$	—		$	0.1

(a) There were no purchases, issuances and sales for the six months ended June 30, 2011.

(b) Amounts transferred in and amounts transferred out are reflected at fair value as of the end of the period.

(c) Represents the amount of total gains or losses for the period, included in gains or losses from commodity derivative activity, net, attributable to change in unrealized gains or losses relating to assets and liabilities classified as Level 3 that are still held as of June 30, 2011 and 2010.

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Equity-Based Compensation

6 Months Ended

Jun. 30, 2011

Equity-Based Compensation

Equity-Based Compensation

12. Equity-Based Compensation

On November 28, 2005, the board of directors of our General Partner adopted a long-term incentive plan, or LTIP, for employees, consultants and directors of our General Partner and its affiliates who perform services for us. The LTIP provides for the grant of limited partner units, or LPUs, phantom units, unit options and substitute awards, and, with respect to unit options and phantom units, the grant of dividend equivalent rights, or DERs. Subject to adjustment for certain events, an aggregate of 850,000 LPUs may be delivered pursuant to awards under the LTIP. Awards that are canceled or forfeited, or are withheld to satisfy the General Partner's tax withholding obligations, are available for delivery pursuant to other awards. The LTIP is administered by the compensation committee of the General Partner's board of directors. All awards are subject to cliff vesting, with the exception of the Phantom Units issued to directors in conjunction with our initial public offering, which are subject to graded vesting provisions.

Prior to February 18, 2011, substantially all equity-based awards were accounted for as liability awards. Effective February 18, 2011, the Modification Date, we have the intent and ability to settle certain awards within our control in units and therefore modified the accounting for these awards. We now classify them as equity awards based on their re-measured fair value. The fair value was determined based on the closing price of our common units on the Modification Date. Such modification resulted in a reclassification of $1.9 million from share-based compensation liability to additional paid-in capital on the Modification Date. Compensation expense on unvested equity awards as of the Modification Date will be recognized ratably over each remaining vesting period.

We will continue to account for other awards, which are subject to settlement in cash as liability awards. Compensation expense on these awards is recognized ratably over each vesting period, and will be re-measured each reporting period for all awards outstanding until the units are vested. The fair value of all liability awards is determined based on the closing price of our common units at each measurement date.

The reclassification of the affected awards does not impact our accounting for dividend equivalent rights as these instruments will continue to be settled in cash and therefore retain their share-based compensation liability classification.

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Condensed Consolidated Balance Sheets (USD $) In Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 2.4	$ 6.7	[1]
Accounts receivable:
Trade, net of allowance for doubtful accounts of $0.3 and $0.5 million, respectively	66.4	89.3
Affiliates	74.2	61.7
Inventories	42.4	64.1	[1]
Unrealized gains on derivative instruments	1.3	1.9
Assets held for sale		6.2
Other	1.6	2.1
Total current assets	188.3	232.0	[1]
Property, plant and equipment, net	1,115.3	1,097.1	[1]
Goodwill	146.9	139.3
Intangible assets, net	117.0	119.3
Investments in unconsolidated affiliates	218.5	216.9
Unrealized gains on derivative instruments	1.7	1.4
Other long-term assets	7.3	7.2
Total assets	1,795.0	1,813.2	[1]
LIABILITIES AND EQUITY
Trade	78.4	99.1
Affiliates	29.2	37.6
Unrealized losses on derivative instruments	47.0	43.0
Revolving credit facility	461.0
Other	38.0	31.5
Total current liabilities	653.6	211.2
Long-term debt	249.8	647.8	[1]
Unrealized losses on derivative instruments	52.6	50.3
Other long-term liabilities	15.8	53.1
Total liabilities	971.8	962.4	[1]
Commitments and contingent liabilities			[1]
Equity:
Predecessor equity		112.6	[1]
Common unitholders (44,083,418 and 40,478,383 units issued and outstanding, respectively)	628.2	552.2
General partner	(5.6)	(6.4)
Accumulated other comprehensive loss	(22.5)	(27.7)	[1]
Total partners' equity	600.1	630.7	[1]
Noncontrolling interests	223.1	220.1	[1]
Total equity	823.2	850.8	[1]
Total liabilities and equity	$ 1,795.0	$ 1,813.2	[1]

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Risk Management and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2011

Risk Management and Hedging Activities

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)

	June 30, 2011			December 31, 2010
	(Millions)
Commodity cash flow hedges:
Net deferred losses in AOCI	$	(1.2	)	$	(0.3	)
Interest rate cash flow hedges:
Net deferred losses in AOCI		(21.3	)		(27.4	)
Total AOCI	$	(22.5	)	$	(27.7	)

Schedule of Designated and Non-Designated Derivative Instruments in Statement Of Financial Position, Fair Value

		00000000		00000000	00000000		00000000			00000000
Balance Sheet Line Item	June 30, 2011		December 31, 2010		Balance Sheet Line Item	June 30, 2011			December 31, 2010
	(Millions)					(Millions)
Derivative Assets Designated as Hedging Instruments:					Derivative Liabilities Designated as Hedging Instruments:
Interest rate derivatives:					Interest rate derivatives:
Unrealized gains on derivative instruments – current	$	—	$	—	Unrealized losses on derivative instruments – current	$	(16.3	)	$	(12.2	)
Unrealized gains on derivative instruments – long term		—		—	Unrealized losses on derivative instruments – long term		(4.5	)		(5.4	)
	$	—	$	—		$	(20.8	)	$	(17.6	)
Derivative Assets Not Designated as Hedging Instruments:					Derivative Liabilities Not Designated as Hedging Instruments:
Commodity derivatives:					Commodity derivatives:
Unrealized gains on derivative instruments – current	$	1.3	$	1.9	Unrealized losses on derivative instruments – current	$	(29.8	)	$	(26.0	)
Unrealized gains on derivative instruments – long term		1.7		1.4	Unrealized losses on derivative instruments – long term		(48.1	)		(40.4	)
	$	3.0	$	3.3		$	(77.9	)	$	(66.4	)
Interest rate derivatives:					Interest rate derivatives:
Unrealized gains on derivative instruments – current	$	—	$	—	Unrealized losses on derivative instruments – current	$	(0.9	)	$	(4.8	)
Unrealized gains on derivative instruments – long term		—		—	Unrealized losses on derivative instruments – long term		—			(4.5	)
	$	—	$	—		$	(0.9	)	$	(9.3	)

Schedule of Derivatives Accounted for as Cash Flow Hedges

	(Loss) Recognized in AOCI on Derivatives — Effective  Portion						Loss Reclassified From AOCI to Earnings — Effective Portion						Gain (Loss) Recognized in Income on Derivatives — Ineffective Portion and Amount Excluded From Effectiveness Testing
	Three Months Ended June 30,
	2011			2010			2011			2010			2011		2010
	(Millions)						(Millions)						(Millions)
Interest rate derivatives	$	(3.3	)	$	(5.8	)	$	(5.1	)	$	(5.6	) (a)	$	—	$	—	(a)(c)
Commodity derivatives	$	(0.1	)	$	—		$	—		$	—	(b)	$	—	$	—	(b)(c)

(a) Included in interest expense in our condensed consolidated statements of operations.

(b) Included in sales of natural gas, propane, NGLs and condensate in our condensed consolidated statements of operations.

(c) For the three months ended June 30, 2011 and 2010, no derivative gains or losses were reclassified from AOCI to current period earnings as a result of the discontinuance of cash flow hedges related to certain forecasted transactions that are not probable of occurring.

	(Loss) Recognized in AOCI on Derivatives — Effective  Portion						Loss Reclassified From AOCI to Earnings —Effective Portion						Gain (Loss) Recognized in Income on Derivatives — Ineffective Portion and Amount Excluded From Effectiveness Testing					Deferred Losses in AOCI Expected to be Reclassified into Earnings
	Six Months Ended June 30,																	Over the Next
	2011			2010			2011			2010			2011		2010			12 Months
	(Millions)						(Millions)						(Millions)					(Millions)
Interest rate derivatives	$	(4.2	)	$	(13.4	)	$	(10.3	)	$	(11.2	) (a)	$	—	$	—	(a)(c)	$	(19.0	)
Commodity derivatives	$	(0.1	)	$	—		$	(0.1	)	$	(0.4	) (b)	$	—	$	—	(b)(c)	$	(0.1	)

(a) Included in interest expense in our condensed consolidated statements of operations.

(b) Included in sales of natural gas, propane, NGLs and condensate in our condensed consolidated statements of operations.

(c) For the six months ended June 30, 2011 and 2010, no derivative gains or losses were reclassified from AOCI to current period earnings as a result of the discontinuance of cash flow hedges related to certain forecasted transactions that are not probable of occurring.

Schedule of Changes in Derivative Instruments Not Designated as Hedging Instruments

Commodity Derivatives: Statements of Operations Line Item	Three Months Ended June 30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
Third party:
Realized	$	(8.9	)	$	—		$	(14.9	)	$	(2.1	)
Unrealized		22.1			22.8			(10.8	)		30.9
Gains (losses) from commodity derivative activity, net	$	13.2		$	22.8		$	(25.7	)	$	28.8
Affiliates:
Realized	$	(0.4	)	$	0.2		$	(1.0	)	$	0.1
Unrealized		(0.2	)		(0.5	)		(0.9	)		(0.4	)
Losses from commodity derivative activity, net — affiliates	$	(0.6	)	$	(0.3	)	$	(1.9	)	$	(0.3	)
Interest Rate Derivatives: Statements of Operations Line Item	Three Months Ended June 30,						Six Months Ended June  30,
	2011			2010			2011			2010
	(Millions)
Third party:
Realized losses	$	(1.3	)	$	—		$	(2.3	)	$	—
Unrealized gains		1.2			—			2.8			—
Interest expense	$	(0.1	)	$	—		$	0.5		$	—

Schedule of Net Long or Short Positions Expected to be Realized

	June 30, 2011
	Crude Oil			Natural Gas			Natural Gas Liquids
Year of Expiration	Net Long (Short) Position (Bbls)			Net Long (Short) Position (MMBtu)			Net Long (Short) Position (Bbls)
2011		(178,281	)		(382,600	)		(633,195	)
2012		(1,021,587	)		(366,000	)		—
2013		(941,998	)		(365,000	)		—
2014		(547,500	)		(365,000	)		—
2015		(365,000	)		—			—
2016		(183,000	)		—			—

	June 30, 2010
	Crude Oil			Natural Gas			Natural Gas Liquids
Year of Expiration	Net Long (Short) Position (Bbls)			Net Long (Short) Position (MMBtu)			Net Long (Short) Position (Bbls)
2010		(490,360	)		(1,110,100	)		—
2011		(949,000	)		(985,500	)		—
2012		(777,750	)		(988,200	)		—
2013		(748,250	)		(584,000	)		—
2014		(456,250	)		—			—
2015		(182,500	)		—			—

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Business Segments (Segment Information) (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010		Dec. 31, 2010
Total operating revenue	$ 374.2		$ 277.5	[1]	$ 799.3		$ 681.2	[2]
Purchases of natural gas, propane and NGLs	(274.3)		(205.7)	[1]	(649.3)		(538.5)	[2]
Gross margin	99.9	[3]	71.8	[3]	150.0	[3]	142.7	[3]
Operating and maintenance expense	(21.7)		(20.6)		(45.8)		(39.6)
Depreciation and amortization expense	(20.1)		(18.7)	[1]	(40.0)		(36.5)	[2]
General and administrative expense	(8.6)		(8.2)		(17.6)		(16.8)
Other income	0.1		3.5		0.2		3.5
Earnings from unconsolidated affiliates	10.0		6.4	[1],[4]	18.6		20.8	[2],[4]
Interest expense	(8.4)		(7.3)	[1]	(16.4)		(14.5)	[2]
Income tax expense			(0.1)	[1],[5]	(0.2)	[5]	(0.4)	[2],[5]
Net income (loss)	51.2		26.8	[1]	48.8		59.2	[2]
Net income attributable to noncontrolling interests	(9.7)		(1.0)	[1]	(13.2)		(1.1)	[2]
Net income (loss) attributable to partners	41.5		25.8	[1]	35.6		58.1	[2]
Non-cash derivative mark-to-market	(21.0)	[6]	(22.5)	[6]	(12.9)	[6]	30.3	[6]
Capital expenditures	15.5		13.2		29.2		25.4	[2]
Acquisitions, net of cash acquired					151.4		22.0	[2]
Investments in unconsolidated affiliate							0.7
Long-term assets	1,606.7				1,606.7				1,581.2
Current assets	188.3				188.3				232.0	[7]
Total assets	1,795.0				1,795.0				1,813.2	[7]
Natural Gas Services [Member]
Total operating revenue	257.4		211.7		421.9		429.8
Purchases of natural gas, propane and NGLs	(176.3)		(141.5)		(322.8)		(305.8)
Gross margin	81.1	[3]	70.2	[3]	99.1	[3]	124.0	[3]
Operating and maintenance expense	(15.7)		(17.0)		(32.2)		(33.2)
Depreciation and amortization expense	(17.4)		(17.8)		(34.9)		(34.8)
Other income			0.5				0.5
Earnings from unconsolidated affiliates	10.0		6.1		18.6		20.0
Income tax expense				[5]				[5]
Net income (loss)	58.0		42.0		50.6		76.5
Net income attributable to noncontrolling interests	(9.7)		(1.0)		(13.2)		(1.1)
Net income (loss) attributable to partners	48.3		41.0		37.4		75.4
Non-cash derivative mark-to-market	(22.3)	[6]	22.3	[6]	(11.1)	[6]	30.7	[6]
Capital expenditures	12.6		11.2		21.4		23.3
Acquisitions, net of cash acquired					121.8
Investments in unconsolidated affiliate							0.7
Long-term assets	1,247.2	[8]			1,247.2	[8]			1,253.7	[8]
Wholesale Propane Logistics [Member]
Total operating revenue	104.2		62.2		352.0		243.0
Purchases of natural gas, propane and NGLs	(98.0)		(63.1)		(324.0)		(230.2)
Gross margin	6.2	[3]	(0.9)	[3]	28.0	[3]	12.8	[3]
Operating and maintenance expense	(4.2)		(2.6)		(7.8)		(5.2)
Depreciation and amortization expense	(0.7)		(0.3)		(1.4)		(0.6)
Other income			3.0				3.0
Income tax expense				[5]				[5]
Net income (loss)	1.3		(0.8)		18.8		10.0
Net income (loss) attributable to partners	1.3		(0.8)		18.8		10.0
Non-cash derivative mark-to-market	0.5	[6]		[6]	(0.8)	[6]	(0.6)	[6]
Capital expenditures	0.9				1.5
Long-term assets	102.3				102.3				101.7
NGL Logistics [Member]
Total operating revenue	12.6		3.6		27.6		8.4
Purchases of natural gas, propane and NGLs			(1.1)		(4.7)		(2.5)
Gross margin	12.6	[3]	2.5	[3]	22.9	[3]	5.9	[3]
Operating and maintenance expense	(1.8)		(1.0)		(5.8)		(1.2)
Depreciation and amortization expense	(2.0)		(0.6)		(3.7)		(1.1)
Other income	0.1				0.2
Earnings from unconsolidated affiliates			0.3				0.8
Income tax expense				[5]				[5]
Net income (loss)	8.9		1.2		13.6		4.4
Net income (loss) attributable to partners	8.9		1.2		13.6		4.4
Non-cash derivative mark-to-market				[6]				[6]
Capital expenditures	2.0		2.0		6.3		2.1
Acquisitions, net of cash acquired					29.6		22.0
Long-term assets	252.5				252.5				221.7
Other [Member]
Gross margin				[3]				[3]
General and administrative expense	(8.6)		(8.2)		(17.6)		(16.8)
Interest expense	(8.4)		(7.3)		(16.4)		(14.5)
Income tax expense			(0.1)	[5]	(0.2)	[5]	(0.4)	[5]
Net income (loss)	(17.0)		(15.6)		(34.2)		(31.7)
Net income (loss) attributable to partners	(17.0)		(15.6)		(34.2)		(31.7)
Non-cash derivative mark-to-market	0.8	[6]	0.2	[6]	(1.0)	[6]	0.2	[6]
Long-term assets	4.7	[9]			4.7	[9]			4.1	[9]
Eliminations [Member]
Total operating revenue		[10]			(2.2)	[10]
Purchases of natural gas, propane and NGLs		[10]			2.2	[10]
Gross margin		[10],[3]				[10],[3]
Operating and maintenance expense		[10]				[10]
Depreciation and amortization expense		[10]				[10]
General and administrative expense		[10]				[10]
Other income		[10]				[10]
Earnings from unconsolidated affiliates		[10]				[10]
Interest expense		[10]				[10]
Income tax expense		[10],[5]				[10],[5]
Net income (loss)		[10]				[10]
Net income attributable to noncontrolling interests		[10]				[10]
Net income (loss) attributable to partners		[10]				[10]
Non-cash derivative mark-to-market		[10],[6]				[10],[6]
Capital expenditures		[10]				[10]
Acquisitions, net of cash acquired						[10]

[1] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[3] Gross margin consists of total operating revenues, including commodity derivative activity, less purchases of natural gas, propane, NGLs and condensate. Gross margin is viewed as a non-GAAP measure under the rules of the SEC, but is included as a supplemental disclosure because it is a primary performance measure used by management as it represents the results of product sales versus product purchases. As an indicator of our operating performance, gross margin should not be considered an alternative to, or more meaningful than, net income or cash flow as determined in accordance with GAAP. Our gross margin may not be comparable to a similarly titled measure of another company because other entities may not calculate gross margin in the same manner.

[4] As of March 31, 2010, we owned a 45% interest in Black Lake. On July 27, 2010, we acquired an additional 5% interest in Black Lake from DCP Midstream, LLC in a transaction among entities under common control, and on July 30, 2010, we acquired an additional 50% interest in Black Lake from an affiliate of BP PLC, bringing our ownership interest in Black Lake to 100%. Prior to our acquisition of an additional 50% interest in Black Lake, we accounted for Black Lake under the equity method of accounting. Subsequent to this transaction, we account for Black Lake as a consolidated subsidiary.

[5] Income tax expense relates primarily to the Texas margin tax and the Michigan business tax.

[6] Non-cash derivative mark-to-market is included in segment gross margin, along with cash settlements for our derivative contracts.

[7] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[8] The segment information for the three and six months ended June 30, 2010 and as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[9] Other long-term assets not allocable to segments consist of unrealized gains on derivative instruments, corporate leasehold improvements and other long-term assets.

[10] Represents intersegment revenues consisting of sales of NGLs by Marysville in our NGL Logistics business to our Wholesale Propane business.

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Equity-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data	Feb. 18, 2011	Nov. 28, 2005
Equity-Based Compensation
Limited partner units		850,000
Reclassification of share-based compensation liability to additional paid-in capital	$ 1.9

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Agreements and Transactions with Affiliates (Balances with Affiliates) (Details) (USD $) In Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Accounts receivable	$ 74.2	$ 61.7
Accounts payable	29.2	37.6
Unconsolidated Affiliates [Member]
Accounts payable		0.9
DCP Midstream, LLC [Member]
Accounts receivable	70.3	60.1
Accounts payable	26.4	27.0
Unrealized gains on derivative instruments - current	0.1	1.3
Unrealized losses on derivative instruments - current	(1.6)	(1.8)
Spectra Energy [Member]
Accounts payable	2.3	8.7
ConocoPhillips [Member]
Accounts receivable	3.9	1.6
Accounts payable	$ 0.5	$ 1.0

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Investments in Unconsolidated Affiliates (Investments in Unconsolidated Affiliates) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Investments in unconsolidated affiliates	$ 218.5	$ 216.9	[1]
Discovery [Member]
Investments in unconsolidated affiliates	103.5	104.1
Additional percentage of ownership interest	40.00%	40.00%
Southeast Texas [Member]
Investments in unconsolidated affiliates	114.8	112.6
Additional percentage of ownership interest	33.00%	33.00%
Others [Member]
Investments in unconsolidated affiliates	$ 0.2	$ 0.2
Additional percentage of ownership interest	50.00%	50.00%

[1] The financial information as of December 31, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

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Risk Management and Hedging Activities (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 100,800,000	$ 100,800,000
Interest rate swap agreements designated as cash flow hedging instruments	425,000,000	425,000,000
Reduce in net liability due to offset of contract	73,500,000	73,500,000
Derivative net liability position	76,100,000	76,100,000
Letters of credit outstanding amount	10,000,000	10,000,000
Letters of credit issued		0
Outstanding parental guarantees	95,000,000	95,000,000
Notional Amount of Interest Rate Derivatives	450,000,000	450,000,000
Gains or losses on discontinuation of interest rate cash flow hedge	0
No cash posted with counterparties to commodity derivative instruments	0	0
Interest Rate Swap [Member]
Mark to market interest rate swaps	25,000,000	25,000,000
Interest rate swap agreements designated as cash flow hedging instruments	425,000,000	425,000,000
Interest rate swap agreements re-price every ninety days	275,000,000	275,000,000
Interest rate swap agreements re-price every thirty days	175,000,000	175,000,000
Effective fixed rates lower range	2.94%	2.94%
Effective fixed rates higher range	5.19%	5.19%
Notional Amount of Interest Rate Derivatives	450,000,000	450,000,000
Fixed rate obligation		150,000,000
Interest Rate Swap [Member]
Effective fixed rates lower range	2.94%	2.94%
Effective fixed rates higher range	5.19%	5.19%
Derivative net liability position	21,700,000	21,700,000
Minimum [Member]
Derivative, Notional Amount	25,000,000	25,000,000
Maximum [Member]
Derivative, Notional Amount	80,000,000	80,000,000
Southeast Texas [Member]
Percentage of ownership	33.33%	33.33%
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 150,000,000	$ 150,000,000

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Acquisitions (Unaudited Pro Forma Information) (Details) (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net loss attributable to predecessor operations		$ 0.2		$ (6.3)
General partner unitholders interest in net income or loss	(6.2)	(4.2)	(11.7)	(8.0)
Net income (loss) allocable to limited partners	35.3	21.8	23.9	43.8
DCP Midstream Partners, LP [Member]
Total operating revenues		277.5		681.2
Net income (loss) attributable to partners		25.8		58.1
Net loss attributable to predecessor operations		0.2		(6.3)
General partner unitholders interest in net income or loss		(4.2)		(8.0)
Net income (loss) allocable to limited partners		21.8		43.8
Net income (loss) per limited partner unit - basic and diluted		$ 0.63		$ 1.27
Marysville [Member]
Total operating revenues		6.2		14.8
Net income (loss) attributable to partners		2.3		6.3
General partner unitholders interest in net income or loss
Net income (loss) allocable to limited partners		2.3		6.3
Net income (loss) per limited partner unit - basic and diluted		$ 0.07		$ 0.18
DCP Midstream Partners, LP Pro Forma [Member]
Total operating revenues		283.7		696.0
Net income (loss) attributable to partners		28.1		64.4
Net loss attributable to predecessor operations		0.2		(6.3)
General partner unitholders interest in net income or loss		(4.2)		(8.0)
Net income (loss) allocable to limited partners		$ 24.1		$ 50.1
Net income (loss) per limited partner unit - basic and diluted		$ 0.70		$ 1.45

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Agreements and Transactions with Affiliates (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended				3 Months Ended		6 Months Ended					6 Months Ended	3 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended			0 Months Ended				3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011 DCP Midstream, LLC [Member] Commodity Derivative Instruments [Member]	Jun. 30, 2011 East Texas System [Member]	Jun. 30, 2010 East Texas System [Member]	Jun. 30, 2011 East Texas System [Member]	Jun. 30, 2010 East Texas System [Member]	Jun. 30, 2011 DCP Midstream, LLC [Member] East Texas System [Member]	Jun. 30, 2011 East Texas System [Member]	Dec. 31, 2010 Noncontrolling Interests [Member]	Jun. 30, 2011 Dcp Midstream Partners Lp [Member]	Jun. 30, 2011 DCP Midstream, LLC [Member]	Jun. 30, 2011 DCP Midstream, LLC [Member]	Jul. 31, 2010 DCP Midstream, LLC [Member]	Jul. 27, 2010 DCP Midstream, LLC [Member]	Jun. 30, 2011 ConocoPhillips [Member]	Jun. 30, 2010 ConocoPhillips [Member]	Jun. 30, 2011 ConocoPhillips [Member]	Jun. 30, 2010 ConocoPhillips [Member]	Jun. 30, 2011 Spectra Energy Corp [Member] gal MMcf	Sep. 16, 2010 Collbran [Member]	Jun. 30, 2011 Collbran [Member]	Dec. 31, 2010 Collbran [Member]	Feb. 28, 2010 Collbran [Member]	Jun. 30, 2010 Southeast Texas [Member]		Jun. 30, 2011 Southeast Texas [Member]
Annual amount on omnibus agreement				$ 10.2
General and administrative expenses incurred	3.7	3.4		7.9	7.1			1.9	1.9	3.8	3.9
Other expenses	0.4	0.5		0.7	0.8
Percentage of Business Acquired																		5.00%	5.00%									5.00%			33.33%
Business acquisition cash paid																															150.0
Contributions from DCP Midstream, LLC								2.7	5.3	5.6	9.1
Sell of certain surplus equipment net book value																									6.2
Proceeds from sell of certain surplus equipment net																									3.6
Percentage of investment in affiliate												49.90%		25.00%
Ownership interest percentage								50.10%		50.10%			50.10%			27.00%	27.00%			50.00%		50.00%		50.00%		75.00%	75.00%
Recognized distribution				2.6
Capital reimbursements																				0	0.2	0	0.2
Parental guarantees issued							95.0									6.0	6.0
Supply of propane annually in gallon																								185,000,000
Supply of Natural Gas Services (MMcf/d)																								35
Settlement receivable										7.0							1.2
Remaining settlement receivable															1.6		5.8
Net income attributable to noncontrolling interests	$ 9.7	$ 1.0	[1]	$ 13.2	$ 1.1	[2]										$ 4.2	$ 4.2													[3]

[1] The financial information for the three months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[2] The financial information for the six months ended June 30, 2010 includes the results of Southeast Texas as transfers of net assets between entities under common control are accounted for as if the transfer occurred at the beginning of the period, and prior years are retrospectively adjusted to furnish comparative information similar to the pooling method.

[3] The financial statements of our predecessor have been prepared from the separate records maintained by DCP Midstream, LLC and may not necessarily be indicative of the conditions that would have existed or the results of operations if our predecessor had been operated as an unaffiliated entity. Specifically, the terms of the joint venture agreement provide that distributions and earnings to us for the first seven years related to storage and transportation gross margin will be pursuant to a fee-based arrangement, based on storage capacity and tailgate volumes. Distributions and earnings related to the gathering and processing business, along with reductions for all expenditures, will be pursuant to our and DCP Midstream, LLC's respective ownership interest in Southeast Texas. These terms of the agreement are not reflected in the historical financial statements.

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Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Goodwill and Intangible Assets
Gross carrying amount	$ 129.4	$ 128.7
Accumulated amortization	(12.4)	(9.4)
Intangible assets, net	$ 117.0	$ 119.3

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Partnership Equity and Distributions (Tables)

6 Months Ended

Jun. 30, 2011

Partnership Equity and Distributions

Cash Distribution

Payment Date	Per Unit Distribution		Total Cash Distribution
			(Millions)
May 13, 2011	$	0.6250	$	33.4
February 14, 2011	$	0.6175	$	30.0
November 12, 2010	$	0.6100	$	27.4
August 13, 2010	$	0.6100	$	25.3
May 14, 2010	$	0.6000	$	24.6
February 12, 2010	$	0.6000	$	24.6