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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME |  |  |  |
Net income | $ 553.3 | $ 567.2 | $ 1,308.6 | $ 1,222.7
Commodity derivative instruments: |  |  |  |
Changes in fair value of cash flow hedges | 34.1 | 105.0 | (13.5) | 45.4
Reclassification of gains and losses to net income | (7.2) | 14.2 | 0.1 | 36.2
Interest rate derivative instruments: |  |  |  |
Changes in fair value of cash flow hedges | 0 | (84.0) | 6.7 | (55.1)
Reclassification of losses to net income | 7.8 | 3.7 | 13.7 | 6.4
Total cash flow hedges | 34.7 | 38.9 | 7.0 | 32.9
Change in funded status of pension and postretirement plans, net of tax | 0.4 | 0 | 0.4 | (1.2)
Proportionate share of other comprehensive income of unconsolidated affiliate | 0 | 0 | 0 | 1.0
Change in fair value of available-for-sale equity securities | 0 | (15.8) | 0 | 0
Total other comprehensive income | 35.1 | 23.1 | 7.4 | 32.7
Comprehensive income | 588.4 | 590.3 | 1,316.0 | 1,255.4
Comprehensive income attributable to noncontrolling interests | (0.8) | (0.9) | (2.6) | (5.1)
Comprehensive income attributable to entity | $ 587.6 | $ 589.4 | $ 1,313.4 | $ 1,250.3

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- Definition 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. + References No definition available. + Details
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- Definition Net of tax effect change in accumulated gains and losses from interest rate 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. + References No definition available. + Details
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