Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues - related parties:
Total revenue - related parties	$ 56.7	$ 72.3	$ 71.5
Costs and expenses - related parties:
Operating costs and expenses	1,104.0	1,080.5	992.1
General and administrative expenses	113.1	114.1	130.8
Total costs and expenses - related parties	1,217.1	1,194.6	$ 1,122.9
Accounts receivable - related parties:
Total accounts receivable - related parties	1.1	1.2
Accounts payable - related parties:
Total accounts payable - related parties	$ 105.1	$ 84.1
At-the-Market Registration [Member]
Relationship with Affiliates [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
Distribution Reinvestment Plan [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)	15,809,503	12,413,351	9,480,407
EPCO and its privately held affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	$ 963.2	$ 949.3	$ 939.9
Accounts payable - related parties:
Total accounts payable - related parties	88.9	75.6
Distributions:
Total cash distributions	$ 1,070.0	$ 948.3	$ 877.0
Number of Designated Units excluded from distributions (in units)		35,380,000	45,120,000
Relationship with Affiliates [Abstract]
Number of Units (in units)	685,481,428
Percentage of Total Units Outstanding	32.00%
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	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
Gross proceeds from the sale of common units	$ 100.0	100.0	$ 100.0
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]
Costs and expenses - related parties:
Operating costs and expenses	840.7	826.4	801.6
General and administrative expenses	105.3	105.2	121.7
Total costs and expenses - related parties	946.0	931.6	923.3
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties	56.7	72.3	71.5
Costs and expenses - related parties:
Total costs and expenses - related parties	253.9	245.3	183.0
Accounts receivable - related parties:
Total accounts receivable - related parties	1.1	1.2
Accounts payable - related parties:
Total accounts payable - related parties	16.2	8.5
Unconsolidated affiliates [Member] | Seaway Crude Pipeline Company [Member]
Revenues - related parties:
Total revenue - related parties	36.3	47.7	29.4
Costs and expenses - related parties:
Total costs and expenses - related parties	161.2	175.8	130.8
Unconsolidated affiliates [Member] | K/D/S Promix, L.L.C. [Member]
Revenues - related parties:
Total revenue - related parties	7.0	8.8	11.1
Costs and expenses - related parties:
Total costs and expenses - related parties	27.1	24.9	25.8
Unconsolidated affiliates [Member] | Texas Express Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	22.8	6.7	6.5
Unconsolidated affiliates [Member] | Eagle Ford Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	36.2	39.4	25.8
Unconsolidated affiliates [Member] | Management/Operator Fees [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	$ (10.7)	$ (19.1)	$ (24.5)