CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL (USD $) In Millions, except Share data	Total	Common Units	General Partner	Partners' Capital Excluding Noncontrolling Interests	Noncontrolling Interests
Balance (in units) at Dec. 31, 2010	141,199,175	141,000,000
Balance at Dec. 31, 2010	$ 4,573	$ 4,234	$ 108	$ 4,342	$ 231
Increase (Decrease) in Partners' Capital
Net income	418	305	103	408	10
Sale of noncontrolling interest in a subsidiary (Note 10)	370	63	1	64	306
Distributions	(398)	(280)	(102)	(382)	(16)
Issuance of common units	503	493	10	503
Issuance of common units (in units)	7,935,000	8,000,000
Issuance of common units under LTIP	13	13		13
Other comprehensive income	190	186	4	190
Equity compensation expense	14	8	4	12	2
Balance (in units) at Jun. 30, 2011	149,357,119	149,000,000
Balance at Jun. 30, 2011	$ 5,683	$ 5,022	$ 128	$ 5,150	$ 533

Total of Partners' Capital (deficit) items including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity.

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The number of limited partner units outstanding. The limited partners are partners of a publicly traded limited partnership or master limited partnership. Limited partners have limited liability and do not manage the partnership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section F

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-Publisher AICPA
-Name Practice Bulletin (PB)
-Number 14
-Paragraph 10

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21

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Increase in noncontrolling interest balance from issuance of additional shares to noncontrolling interest holders or the sale of all or a portion of the parent's equity interest.

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-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
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-Paragraph 38
-Subparagraph c(2)

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This element represents Other Comprehensive Income (Loss), Net of Tax, for the period. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment.

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-Paragraph 38
-Subparagraph c(3)

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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Total change in each class of partners' capital accounts during the year due to the sale of units. All partners include general, limited and preferred partners.

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Total change in each class of partners' capital accounts during the year due to unit-based compensation. All partners include general, limited and preferred partners.

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Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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-Name Accounting Research Bulletin (ARB)
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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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