Related Party Transactions (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Apr. 08, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Revenues - related parties:
Total revenue - related parties		$ 15.6	$ 6.1
Costs and expenses - related parties:
Total costs and expenses - related parties		310.2	261.1
Accounts receivable - related parties:
Total accounts receivable - related parties		1.1		$ 1.2
Accounts payable - related parties:
Total accounts payable - related parties		37.4		$ 84.1
Related Party Transactions [Abstract]
Operating costs and expenses		280.6	232.1
General and administrative expenses		29.6	29.0
Relationship with Affiliates [Abstract]
Net cash proceeds from the issuance of common units		$ 1,011.5	$ 468.4
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)	25,550,931	35,396,147	12,350,761
Gross proceeds from the sale of common units	$ 594.1	$ 856.5	$ 407.8
Net cash proceeds from the issuance of common units	$ 592.0	$ 849.0	$ 404.2
Distribution Reinvestment Plan [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)		7,162,744	1,869,079
Net cash proceeds from the issuance of common units		$ 159.8	$ 61.7
EPCO and its privately held affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties		237.3	221.9
Accounts payable - related parties:
Total accounts payable - related parties		24.3		$ 75.6
Distributions:
Total cash distributions		$ 260.1	231.2
Relationship with Affiliates [Abstract]
Total Number of Units (in units)		685,481,428
Percentage of Total Units Outstanding (in hundredths)		33.30%
Number of Designated Units excluded from distributions (in units)				35,380,000
Enterprise common units pledged as security (in units)		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
Gross proceeds from the sale of common units		$ 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		232.7	217.6
Related Party Transactions [Abstract]
Operating costs and expenses		205.4	191.0
General and administrative expenses		27.3	26.6
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties		15.6	6.1
Costs and expenses - related parties:
Total costs and expenses - related parties		72.9	$ 39.2
Accounts receivable - related parties:
Total accounts receivable - related parties		1.1		$ 1.2
Accounts payable - related parties:
Total accounts payable - related parties		$ 13.1		$ 8.5