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STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME
Net income	$ 2,428.0	$ 2,088.3	$ 1,383.7
Commodity derivative instruments:
Changes in fair value of cash flow hedges	17.3	(221.9)	(76.3)
Reclassification of losses to net income	14.2	232.3	44.0
Interest rate derivative instruments:
Changes in fair value of cash flow hedges	(70.2)	(333.2)	(0.1)
Reclassification of losses to net income	16.2	6.3	25.6
Foreign currency derivative instruments:
Changes in fair value of cash flow hedges	0	0	(0.1)
Reclassification of gains to net income	0	0	(0.3)
Total cash flow hedges	(22.5)	(316.5)	(7.2)
Foreign currency translation adjustment	0	0	0.9
Change in funded status of pension and postretirement plans, net of tax	2.5	(1.3)	0.4
Proportionate share of other comprehensive income of unconsolidated affiliate	1.0	0	10.2
Total other comprehensive income (loss)	(19.0)	(317.8)	4.3
Comprehensive income	2,409.0	1,770.5	1,388.0
Comprehensive income attributable to noncontrolling interests	(8.1)	(41.4)	(1,065.1)
Comprehensive income attributable to limited partners	$ 2,400.9	$ 1,729.1	$ 322.9

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Net of tax effect change in accumulated gains and losses from commodity 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 (decrease) in deferred hedging gains or losses.

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The entity's proportionate share for the period of the other comprehensive income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied.

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Amount after tax, before reclassification adjustments, resulting from the process of expressing in the reporting currency of the reporting entity those amounts that are denominated or measured in a different currency, and from transactions whose terms are denominated in a currency other than the entity's functional currency.

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