Related Party Transactions (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		12 Months Ended
	Feb. 26, 2016	Jan. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2015
Revenues - related parties:
Total revenue - related parties			$ 72.3	$ 71.5	$ 65.9
Costs and expenses - related parties:
Total costs and expenses - related parties			1,194.6	1,122.9	1,052.2
Accounts receivable - related parties:
Total accounts receivable - related parties			1.2	2.8
Accounts payable - related parties:
Total accounts payable - related parties			84.1	118.9
Related Party Transactions [Abstract]
Operating costs and expenses			1,080.5	992.1	937.9
General and administrative expenses			114.1	130.8	114.3
Relationship with Affiliates [Abstract]
Net cash proceeds from the issuance of common units			$ 1,188.6	$ 388.8	$ 1,792.0
At-the-Market Registration [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)			25,520,424	1,590,334	15,249,378
Net cash proceeds from the issuance of common units			$ 817.4	$ 57.7	$ 456.3
Distribution Reinvestment Plan [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)			12,413,351	9,480,407	10,024,828
Net cash proceeds from the issuance of common units			$ 359.8	$ 321.3	$ 287.6
EPCO and affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties			949.3	939.9	892.2
Accounts payable - related parties:
Total accounts payable - related parties			75.6	98.1
Distributions:
Total cash distributions			$ 948.3	$ 877.0	$ 811.4
Number of Designated Units excluded from distributions (in units)			35,380,000	45,120,000	47,400,000
Relationship with Affiliates [Abstract]
Number of Units (in units)			677,159,667
Percentage of total units outstanding (in hundredths)			33.60%
Enterprise common units pledged as security (in units)			118,000,000
EPCO and affiliates [Member] | At-the-Market Registration [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)		3,830,256	3,225,057
Offering price of common unit (in dollars per unit)						$ 31.01
Net cash proceeds from the issuance of common units		$ 100.0	$ 100.0
EPCO and 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		100.0	$ 100.0
EPCO and affiliates [Member] | Administrative Services Agreement [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties			931.6	923.3	$ 875.8
Related Party Transactions [Abstract]
Operating costs and expenses			826.4	801.6	770.6
General and administrative expenses			105.2	121.7	105.2
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties			72.3	71.5	65.9
Costs and expenses - related parties:
Total costs and expenses - related parties			245.3	183.0	160.0
Accounts receivable - related parties:
Total accounts receivable - related parties			1.2	2.8
Accounts payable - related parties:
Total accounts payable - related parties			8.5	20.8
Unconsolidated affiliates [Member] | Seaway Crude Pipeline Company [Member]
Revenues - related parties:
Total revenue - related parties			47.7	29.4	41.3
Costs and expenses - related parties:
Total costs and expenses - related parties			175.8	130.8	132.4
Unconsolidated affiliates [Member] | K/D/S Promix, L.L.C. [Member]
Revenues - related parties:
Total revenue - related parties			8.8	11.1	9.8
Costs and expenses - related parties:
Total costs and expenses - related parties			24.9	25.8	28.1
Unconsolidated affiliates [Member] | Eagle Ford Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties			39.4	25.8	5.4
Unconsolidated affiliates [Member] | Other investments in unconsolidated subsidiaries [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties			$ 19.1	$ 24.5	$ 21.8