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Equity and Distributions, Issuances of Equity (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) shares
Net Cash Proceeds from Sale of Common Units [Abstract]
Net cash proceeds from the issuance of common units | $	$ 2,542.8	$ 1,188.6	$ 388.8
Split of limited partner units ratio			2
Restricted Common Unit Awards [Member]
Treasury Units:
Acquisition of treasury units in connection with vesting of equity-based awards (in units)	409,764
Phantom Unit Awards [Member]
Treasury Units:
Acquisition of treasury units in connection with vesting of equity-based awards (in units)	590,855
Treasury Units [Member]
Treasury Units:
Maximum common units authorized for repurchase under a buy-back program (in units)	4,000,000
Total of common units repurchased under a buy-back program (in units)	2,763,200
Remaining common units available for repurchase (in units)	1,236,800
Total cost of treasury units | $	$ 23.2
Shelf Registration 2013 [Member]
Net Cash Proceeds from Sale of Common Units [Abstract]
Senior notes issued under universal shelf registration | $	1,250.0	$ 2,500.0	$ 4,750.0
At-the-Market Registration [Member]
Registration Statements and Equity Offerings [Line Items]
Maximum common units authorized for issuance | $	1,890.0
Remaining units available for issuance | $	$ 1,440.0
Net Cash Proceeds from Sale of Common Units [Abstract]
Number of common units issued (in units)	87,867,037	25,520,424	1,590,334
Gross proceeds from the sale of common units | $	$ 2,170.0	$ 825.4	$ 58.3
Net cash proceeds from the issuance of common units | $	$ 2,160.0	$ 817.4	$ 57.7
At-the-Market Registration [Member] | EPCO and its privately held affiliates [Member]
Net Cash Proceeds from Sale of Common Units [Abstract]
Number of common units issued (in units)	3,830,256	3,225,057
Gross proceeds from the sale of common units | $	$ 100.0	$ 100.0
Distribution Reinvestment Plan [Member]
Registration Statements and Equity Offerings [Line Items]
Maximum common units authorized for issuance (in units)	240,000,000	140,000,000
Remaining units available for issuance (in units)	99,258,495
Net Cash Proceeds from Sale of Common Units [Abstract]
Number of common units issued (in units)	15,809,503	12,413,351	9,480,407
Net cash proceeds from the issuance of common units | $	$ 374.0	$ 359.8	$ 321.3
Distribution Reinvestment Plan [Member] | EPCO and its privately held affiliates [Member]
Net Cash Proceeds from Sale of Common Units [Abstract]
Number of common units issued (in units)	4,481,504
Gross proceeds from the sale of common units | $	$ 100.0	$ 100.0	$ 100.0
Employee Unit Purchase Plan [Member]
Registration Statements and Equity Offerings [Line Items]
Maximum common units authorized for issuance (in units)	8,000,000
Remaining units available for issuance (in units)	6,265,475
Net Cash Proceeds from Sale of Common Units [Abstract]
Number of common units issued (in units)	507,031	380,562	273,820
Net cash proceeds from the issuance of common units | $	$ 12.7	$ 11.4	$ 9.8

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