UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME
Net income	$ 1,146.0	$ 1,060.8	$ 2,508.6	$ 2,435.8
Commodity hedging derivative instruments:
Changes in fair value of cash flow hedges	(290.4)	(78.2)	(751.6)	396.9
Reclassification of losses (gains) to net income	(99.4)	(208.7)	516.7	(364.3)
Interest rate hedging derivative instruments:
Changes in fair value of cash flow hedges	0.0	7.8	182.9	(270.3)
Reclassification of losses to net income	10.2	9.7	18.8	19.3
Total cash flow hedges	(379.6)	(269.4)	(33.2)	(218.4)
Other	(0.1)	0.0	(0.3)	(0.1)
Total other comprehensive loss	(379.7)	(269.4)	(33.5)	(218.5)
Comprehensive income	766.3	791.4	2,475.1	2,217.3
Comprehensive income attributable to noncontrolling interests	(32.7)	(26.1)	(54.0)	(51.0)
Comprehensive income attributable to preferred units	(1.0)	0.0	(1.9)	0.0
Comprehensive income attributable to common unitholders	$ 732.6	$ 765.3	$ 2,419.2	$ 2,166.3