CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (USD $) In Millions	Total	Units Common	Units Class B Common	General Partner's Interest	Accumulated Other Comprehensive Income	Comprehensive Income
Partners' capital balance at Dec. 31, 2009	$ 141.3	$ 152.8	$ (0.1)	$ (14.6)	$ 3.2
Increase (Decrease) in Partners' Capital
Net earnings	100.6	74.0	1.0	25.6		100.6
Change in fair value of derivatives	(3.2)				(3.2)	(3.2)
Comprehensive income						97.4
Distributions	(23.6)	(22.9)	(0.3)	(0.4)
Partners' capital balance at Jun. 30, 2010	215.1	203.9	0.6	10.6
Partners' capital balance at Dec. 31, 2010	210.0	208.5	0.6	0.9
Increase (Decrease) in Partners' Capital
Net earnings	249.8	139.7	2.4	107.7		249.8
Comprehensive income						249.8
Distributions	(196.4)	(114.7)	(1.9)	(79.8)
Partners' capital balance at Jun. 30, 2011	$ 263.4	$ 233.5	$ 1.1	$ 28.8

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 31, 46
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 14, 17, 20, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The amount of ownership interest of different classes of partners in limited partnership.

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- Definition

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

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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+ Details