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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME |  |
Net income | $ 755.3 | $ 655.5
Commodity derivative instruments: |  |
Changes in fair value of cash flow hedges | (47.6) | (59.6)
Reclassification of losses to net income | 7.3 | 22.0
Interest rate derivative instruments: |  |
Changes in fair value of cash flow hedges | 6.7 | 28.9
Reclassification of losses to net income | 5.9 | 2.7
Total cash flow hedges | (27.7) | (6.0)
Change in funded status of pension and postretirement plans, net of tax | 0 | (1.2)
Proportionate share of other comprehensive income of unconsolidated affiliate | 0 | 1.0
Change in fair value of available-for-sale equity securities | 0 | 15.8
Total other comprehensive income (loss) | (27.7) | 9.6
Comprehensive income | 727.6 | 665.1
Comprehensive income attributable to noncontrolling interests | (1.8) | (4.2)
Comprehensive income attributable to limited partners | $ 725.8 | $ 660.9

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