Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Revenues - related parties:
Total revenue - related parties	$ 15.7	$ 13.9	$ 44.5	$ 27.3
Costs and expenses - related parties:
Total costs and expenses - related parties	311.5	312.9	920.5	869.2
Accounts receivable - related parties:
Total accounts receivable - related parties	1.7		1.7		$ 1.2
Accounts payable - related parties:
Total accounts payable - related parties	97.7		97.7		$ 84.1
Related Party Transactions [Abstract]
Operating costs and expenses	284.5	284.7	835.4	783.9
General and administrative expenses	27.0	28.2	85.1	85.3
Relationship with Affiliates [Abstract]
Net cash proceeds from the issuance of common units			$ 2,170.4	$ 1,011.4
Number of Designated Units excluded from distributions (in units)					35,380,000
At-the-Market Registration [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)			76,113,492	23,258,453
Gross proceeds from the sale of common units			$ 1,870.0	$ 767.1
Net cash proceeds from the issuance of common units			$ 1,850.0	$ 759.7
Distribution Reinvestment Plan [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)			12,946,724	7,965,318
Net cash proceeds from the issuance of common units			$ 306.2	$ 242.8
EPCO and its privately held affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	242.3	246.0	721.0	703.9
Accounts payable - related parties:
Total accounts payable - related parties	$ 81.9		81.9		$ 75.6
Distributions:
Total cash distributions			$ 793.6	$ 705.9
Relationship with Affiliates [Abstract]
Total Number of Units (in units)	685,481,428		685,481,428
Percentage of Total Units Outstanding	32.60%		32.60%
Number of Designated Units excluded from distributions (in units)					35,380,000
Enterprise common units pledged as security (in units)	118,000,000		118,000,000
EPCO and its privately held affiliates [Member] | At-the-Market Registration [Member]
Relationship with Affiliates [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
EPCO and its privately held affiliates [Member] | Distribution Reinvestment Plan [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)			4,481,504
Net cash proceeds from the issuance of common units			$ 100.0
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	$ 238.8	241.7	708.4	691.0
Related Party Transactions [Abstract]
Operating costs and expenses	212.9	215.3	628.9	612.2
General and administrative expenses	25.9	26.4	79.5	78.8
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties	15.7	13.9	44.5	27.3
Costs and expenses - related parties:
Total costs and expenses - related parties	69.2	$ 66.9	199.5	$ 165.3
Accounts receivable - related parties:
Total accounts receivable - related parties	1.7		1.7		$ 1.2
Accounts payable - related parties:
Total accounts payable - related parties	$ 15.8		$ 15.8		$ 8.5