Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues - related parties:
Total revenue - related parties	$ 107.7	$ 45.0	$ 56.7
Costs and expenses - related parties:
Operating costs and expenses	1,406.1	1,112.8	1,104.0
General and administrative expenses	130.9	121.5	113.1
Total costs and expenses - related parties	1,537.0	1,234.3	1,217.1
Accounts receivable - related parties:
Total accounts receivable - related parties	3.5	1.8
Accounts payable - related parties:
Total accounts payable - related parties	140.2	127.3
At-the-Market Registration [Member]
Relationship with Affiliates [Abstract]
Gross proceeds from the sale of common units		603.1	2,170.0
EPCO and its privately held affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	1,089.6	1,010.9	963.2
Accounts payable - related parties:
Total accounts payable - related parties	116.3	99.3
Distributions:
Total cash distributions	$ 1,160.0	1,120.0	1,070.0
Relationship with Affiliates [Abstract]
Number of Units (in units)	697,529,483
Percentage of Total Units Outstanding	31.90%
Enterprise common units pledged as security (in units)	108,222,618
EPCO and its privately held affiliates [Member] | At-the-Market Registration [Member]
Relationship with Affiliates [Abstract]
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]
Gross proceeds from the sale of common units	$ 213.0	100.0	100.0
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]
Costs and expenses - related parties:
Operating costs and expenses	948.8	882.1	840.7
General and administrative expenses	124.2	110.4	105.3
Total costs and expenses - related parties	1,073.0	992.5	946.0
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties	107.7	45.0	56.7
Costs and expenses - related parties:
Total costs and expenses - related parties	447.4	223.4	253.9
Accounts receivable - related parties:
Total accounts receivable - related parties	3.5	1.8
Accounts payable - related parties:
Total accounts payable - related parties	23.9	28.0
Unconsolidated affiliates [Member] | Seaway Crude Pipeline Company [Member]
Revenues - related parties:
Total revenue - related parties	74.4	19.6	36.3
Costs and expenses - related parties:
Total costs and expenses - related parties	163.2	98.8	161.2
Unconsolidated affiliates [Member] | Venice Energy Service Company, L.L.C. [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	157.9
Unconsolidated affiliates [Member] | K/D/S Promix, L.L.C. [Member]
Revenues - related parties:
Total revenue - related parties	9.5	7.8	7.0
Costs and expenses - related parties:
Total costs and expenses - related parties	31.9	27.8	27.1
Unconsolidated affiliates [Member] | Texas Express Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	57.6	29.5	22.8
Unconsolidated affiliates [Member] | Eagle Ford Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	18.5	42.8	36.2
Unconsolidated affiliates [Member] | Management/Operator Fees [Member] | Other investments in unconsolidated subsidiaries [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	$ (11.6)	$ (10.6)	$ (10.7)