Commitments and Contingencies, Contractual Obligations (Details) bbl in Millions, $ in Millions, BTU in Trillions	12 Months Ended
	Dec. 31, 2016 USD ($) bbl BTU	Dec. 31, 2015 USD ($)
Scheduled maturities of debt obligations [Abstract]
2017	$ 2,577.2
2018	1,100.0
2019	1,500.0
2020	1,500.0
2021	575.0
Thereafter	16,649.4
Total	23,901.6	$ 22,738.5
Estimated cash interest payments [Abstract]
2017	1,073.3
2018	1,060.0
2019	999.5
2020	941.4
2021	883.6
Thereafter	15,412.4
Total	20,370.2
Operating lease obligations [Abstract]
2017	57.1
2018	51.0
2019	45.8
2020	42.3
2021	35.9
Thereafter	205.9
Total	438.0
Natural Gas [Member]
Estimated payment obligations:
2017	912.5
2018	849.3
2019	695.8
2020	551.7
2021	458.2
Thereafter	0.0
Total	$ 3,467.5
Underlying major volume commitments:
2017 | BTU	261
2018 | BTU	245
2019 | BTU	200
2020 | BTU	156
2021 | BTU	130
Thereafter | BTU	0
Total | BTU	992
NGLs [Member]
Estimated payment obligations:
2017	$ 68.5
2018	50.8
2019	21.6
2020	0.0
2021	0.0
Thereafter	0.0
Total	$ 140.9
Underlying major volume commitments:
2017 | bbl	6
2018 | bbl	5
2019 | bbl	2
2020 | bbl	0
2021 | bbl	0
Thereafter | bbl	0
Total | bbl	13
Crude Oil [Member]
Estimated payment obligations:
2017	$ 421.7
2018	377.1
2019	325.6
2020	155.4
2021	28.0
Thereafter	104.9
Total	$ 1,412.7
Underlying major volume commitments:
2017 | bbl	8
2018 | bbl	7
2019 | bbl	6
2020 | bbl	3
2021 | bbl	1
Thereafter | bbl	2
Total | bbl	27
Petrochemicals And Refined Products [Member]
Estimated payment obligations:
2017	$ 202.5
2018	202.6
2019	106.2
2020	3.0
2021	0.0
Thereafter	0.0
Total	$ 514.3
Underlying major volume commitments:
2017 | bbl	7
2018 | bbl	7
2019 | bbl	4
2020 | bbl	0
2021 | bbl	0
Thereafter | bbl	0
Total | bbl	18
Estimated Payment Obligations Other [Member]
Estimated payment obligations:
2017	$ 9.5
2018	9.4
2019	9.4
2020	7.9
2021	4.6
Thereafter	5.2
Total	46.0
Service Payment Commitments [Member]
Estimated payment obligations:
2017	180.6
2018	107.8
2019	84.8
2020	58.0
2021	44.9
Thereafter	109.1
Total	585.2
Capital Expenditure Commitments [Member]
Estimated payment obligations:
2017	57.8
2018	0.0
2019	0.0
2020	0.0
2021	0.0
Thereafter	0.0
Total	57.8
EFS Midstream Contract with Producers [Member]
Contractual obligation [Line Items]
Contractual obligation	270.0	$ 270.0
Capital expenditures to date	$ 133.0
Contract term	10 years	10 years