Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Quarterly Financial Information (Unaudited) [Abstract]
Revenues	$ 9,182.3	$ 9,585.9	$ 8,467.5	$ 9,298.5	$ 8,426.6	$ 6,886.9	$ 6,607.6	$ 7,320.4	$ 36,534.2	[1]	$ 29,241.5	[2]	$ 23,022.3	[2]
Operating income	1,640.4	1,643.3	986.4	1,138.5	1,079.4	879.2	938.7	1,031.6	5,408.6		3,928.9		3,580.7
Net income	1,305.2	1,334.6	687.2	911.5	797.3	621.3	666.0	771.0	4,238.5		2,855.6		2,553.0
Net income attributable to limited partners	$ 1,284.7	$ 1,313.2	$ 673.8	$ 900.7	$ 774.0	$ 610.9	$ 653.7	$ 760.7	$ 4,172.4		$ 2,799.3		$ 2,513.1
Earnings per unit:
Basic earnings per unit (in dollars per unit)	$ 0.59	$ 0.60	$ 0.31	$ 0.41	$ 0.36	$ 0.28	$ 0.30	$ 0.36	$ 1.91		$ 1.30		$ 1.20
Diluted earnings per unit (in dollars per unit)	$ 0.59	$ 0.60	$ 0.31	$ 0.41	$ 0.36	$ 0.28	$ 0.30	$ 0.36	$ 1.91		$ 1.30		$ 1.20

[1] Revenues are accounted for under ASC 606 upon implementation at January 1, 2018.

[2] Revenues are accounted for under ASC 605 for historical periods prior to January 1, 2018.