STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME
Net income	$ 3,885.7	$ 4,687.1	$ 4,238.5
Commodity hedging derivative instruments:
Changes in fair value of cash flow hedges	124.4	44.1	293.2
Reclassification of gains to net income	(272.7)	(141.7)	(130.4)
Interest rate hedging derivative instruments:
Changes in fair value of cash flow hedges	(127.5)	81.4	22.2
Reclassification of losses to net income	39.3	37.3	38.1
Total cash flow hedges	(236.5)	21.1	223.1
Other	(0.1)	(0.6)	(0.5)
Total other comprehensive income (loss)	(236.6)	20.5	222.6
Comprehensive income	3,649.1	4,707.6	4,461.1
Comprehensive income attributable to noncontrolling interests	(110.1)	(95.8)	(66.1)
Comprehensive income attributable to preferred units	(0.9)	0.0	0.0
Comprehensive income attributable to common unitholders	$ 3,538.1	$ 4,611.8	$ 4,395.0