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STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME      
Net income $ 4,687.1 $ 4,238.5 $ 2,855.6
Commodity hedging derivative instruments:      
Change in fair value of cash flow hedges 44.1 293.2 (38.5)
Reclassification of losses (gains) to net income (141.7) (130.4) 112.2
Interest rate hedging derivative instruments:      
Change in fair value of cash flow hedges 81.4 22.2 (5.7)
Reclassification of losses to net income 37.3 38.1 40.4
Total cash flow hedges 21.1 223.1 108.4
Other (0.6) (0.5) (0.1)
Total other comprehensive income 20.5 222.6 108.3
Comprehensive income 4,707.6 4,461.1 2,963.9
Comprehensive income attributable to noncontrolling interests (95.8) (66.1) (56.3)
Comprehensive income attributable to limited partners $ 4,611.8 $ 4,395.0 $ 2,907.6