UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED EQUITY - USD ($) $ in Millions	Total	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests in Consolidated Subsidiaries [Member]	Common Limited Partners Interests [Member]	Treasury Units [Member]
Balance at Dec. 31, 2018	$ 24,292.2	$ 50.9	$ 438.7	$ 23,802.6
Increase (Decrease) in Partners' Equity [Roll Forward]
Net income	3,561.7	0.0	67.3	3,494.4
Cash distributions paid to common unitholders	(2,871.1)	0.0	0.0	(2,871.1)
Cash payments made in connection with distribution equivalent rights	(16.4)	0.0	0.0	(16.4)
Cash distributions paid to noncontrolling interests	(69.7)	0.0	(69.7)	0.0
Cash contributions from noncontrolling interests	590.8	0.0	590.8	0.0
Net cash proceeds from the issuance of common units	82.2	0.0	0.0	82.2
Common units issued in connection with employee compensation	45.6	0.0	0.0	45.6
Amortization of fair value of equity-based awards	107.2	0.0	0.0	107.2
Repurchase and cancellation of common units under 2019 Buyback Program	(81.1)	0.0	0.0	(81.1)
Cash flow hedges	(89.4)	(89.4)	0.0	0.0
Other, net	(26.5)	(0.6)	2.4	(28.3)
Balance at Sep. 30, 2019	25,525.5	(39.1)	1,029.5	24,535.1
Balance at Jun. 30, 2019	24,975.4	(10.7)	535.6	24,450.5
Increase (Decrease) in Partners' Equity [Roll Forward]
Net income	1,044.8	0.0	25.6	1,019.2
Cash distributions paid to common unitholders	(963.2)	0.0	0.0	(963.2)
Cash payments made in connection with distribution equivalent rights	(5.9)	0.0	0.0	(5.9)
Cash distributions paid to noncontrolling interests	(22.8)	0.0	(22.8)	0.0
Cash contributions from noncontrolling interests	491.2	0.0	491.2	0.0
Amortization of fair value of equity-based awards	36.7	0.0	0.0	36.7
Cash flow hedges	(28.4)	(28.4)	0.0	0.0
Other, net	(2.3)	0.0	(0.1)	(2.2)
Balance at Sep. 30, 2019	25,525.5	(39.1)	1,029.5	24,535.1
Balance at Dec. 31, 2019	25,827.5	71.4	1,063.5	24,692.6	$ 0.0
Increase (Decrease) in Partners' Equity [Roll Forward]
Net income	3,519.8	0.0	82.4	3,437.4	0.0
Cash distributions paid to common unitholders	(2,919.6)	0.0	0.0	(2,919.6)	0.0
Cash payments made in connection with distribution equivalent rights	(20.0)	0.0	0.0	(20.0)	0.0
Cash distributions paid to noncontrolling interests	(97.8)	0.0	(97.8)	0.0	0.0
Cash contributions from noncontrolling interests	21.2	0.0	21.2	0.0	0.0
Amortization of fair value of equity-based awards	120.1	0.0	0.0	120.1	0.0
Repurchase and cancellation of common units under 2019 Buyback Program	(173.8)	0.0	0.0	(173.8)	0.0
Common units issued to Skyline North Americas, Inc. in connection with settlement of Liquidity Option	1,297.3	0.0	0.0	1,297.3	0.0
Treasury units acquired in connection with settlement of Liquidity Option, at cost	(1,297.3)	0.0	0.0	0.0	(1,297.3)
Common units exchanged for preferred units, with common units received being immediately cancelled	(17.5)	0.0	0.0	(17.5)	0.0
Cash flow hedges	(120.6)	(120.6)	0.0	0.0	0.0
Other, net	(34.6)	(0.1)	0.1	(34.6)	0.0
Balance at Sep. 30, 2020	26,104.7	(49.3)	1,069.4	26,381.9	(1,297.3)
Balance at Jun. 30, 2020	25,941.4	(147.1)	1,064.7	26,321.1	(1,297.3)
Increase (Decrease) in Partners' Equity [Roll Forward]
Net income	1,084.0	0.0	31.4	1,052.6	0.0
Cash distributions paid to common unitholders	(972.7)	0.0	0.0	(972.7)	0.0
Cash payments made in connection with distribution equivalent rights	(7.1)	0.0	0.0	(7.1)	0.0
Cash distributions paid to noncontrolling interests	(36.0)	0.0	(36.0)	0.0	0.0
Cash contributions from noncontrolling interests	1.5	0.0	1.5	0.0	0.0
Amortization of fair value of equity-based awards	39.5	0.0	0.0	39.5	0.0
Repurchase and cancellation of common units under 2019 Buyback Program	(33.7)	0.0	0.0	(33.7)	0.0
Common units exchanged for preferred units, with common units received being immediately cancelled	(17.5)	0.0	0.0	(17.5)	0.0
Cash flow hedges	97.8	97.8	0.0	0.0	0.0
Other, net	7.5	0.0	7.8	(0.3)	0.0
Balance at Sep. 30, 2020	$ 26,104.7	$ (49.3)	$ 1,069.4	$ 26,381.9	$ (1,297.3)