Commitments and Contingencies, Contractual Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Scheduled maturities of debt obligations [Abstract]
2019	$ 1,500.0
2020	1,500.0
2021	1,325.0
2022	1,400.0
2023	1,250.0
Thereafter	19,445.6
Total	26,420.6	$ 24,780.1
Estimated cash interest payments [Abstract]
2019	1,190.4
2020	1,132.5
2021	1,062.9
2022	1,010.1
2023	969.9
Thereafter	20,154.4
Total	25,520.2
Operating lease obligations [Abstract]
2019	50.5
2020	45.6
2021	38.7
2022	30.8
2023	20.9
Thereafter	138.3
Total	324.8
Natural Gas [Member]
Estimated payment obligations:
2019	572.0
2020	599.4
2021	459.8
2022	0.0
2023	0.0
Thereafter	0.0
Total	1,631.2
NGLs [Member]
Estimated payment obligations:
2019	760.6
2020	739.4
2021	620.3
2022	527.7
2023	310.3
Thereafter	478.9
Total	3,437.2
Crude Oil [Member]
Estimated payment obligations:
2019	1,038.6
2020	771.3
2021	557.1
2022	543.1
2023	438.1
Thereafter	1,430.0
Total	4,778.2
Petrochemicals And Refined Products [Member]
Estimated payment obligations:
2019	179.0
2020	178.3
2021	42.4
2022	0.0
2023	0.0
Thereafter	0.0
Total	399.7
Estimated Payment Obligations Other [Member]
Estimated payment obligations:
2019	8.2
2020	8.3
2021	4.3
2022	2.3
2023	2.4
Thereafter	1.9
Total	27.4
Service Payment Commitments [Member]
Estimated payment obligations:
2019	75.1
2020	72.2
2021	55.3
2022	53.7
2023	38.9
Thereafter	108.6
Total	403.8
Capital Expenditure Commitments [Member]
Estimated payment obligations:
2019	171.8
2020	0.0
2021	0.0
2022	0.0
2023	0.0
Thereafter	0.0
Total	171.8
EFS Midstream Contract with Producers [Member]
Contractual obligation [Line Items]
Contractual obligation	270.0
Capital expenditures to date	$ 151.0
Contract term	10 years