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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED OPERATIONS - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Revenues:    
Third parties $ 7,309.6 $ 4,989.7
Related parties 10.8 15.6
Total revenues 7,320.4 5,005.3
Operating costs and expenses:    
Third parties 6,081.6 3,866.3
Related parties 251.6 280.6
Total operating costs and expenses 6,333.2 4,146.9
General and administrative costs:    
Third parties 20.7 14.3
Related parties 29.7 29.6
Total general and administrative costs 50.4 43.9
Total costs and expenses 6,383.6 4,190.8
Equity in income of unconsolidated affiliates 94.8 101.1
Operating income 1,031.6 915.6
Other income (expense):    
Interest expense (249.3) (240.6)
Other, net (5.3) 3.6
Total other expense, net (254.6) (237.0)
Income before income taxes 777.0 678.6
Provision for income taxes (6.0) (8.4)
Net income 771.0 670.2
Net income attributable to noncontrolling interests (10.3) (9.0)
Net income attributable to limited partners $ 760.7 $ 661.2
Earnings per unit:    
Basic earnings per unit (in dollars per unit) $ 0.36 $ 0.32
Diluted earnings per unit (in dollars per unit) $ 0.36 $ 0.32