Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues - related parties:
Total revenue - related parties	$ 36.7	$ 67.3	$ 107.7
Costs and expenses - related parties:
Operating costs and expenses	1,210.6	1,412.0	1,406.1
General and administrative expenses	136.2	136.4	130.9
Total costs and expenses - related parties	1,346.8	1,548.4	1,537.0
Accounts receivable - related parties:
Total accounts receivable - related parties	5.6	2.5
Accounts payable - related parties:
Total accounts payable - related parties	149.5	162.3
EPCO and its privately held affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	1,143.7	1,145.3	1,089.6
Accounts receivable - related parties:
Total accounts receivable - related parties	1.9	0.0
Accounts payable - related parties:
Total accounts payable - related parties	139.6	143.7
Distributions:
Total cash distributions	1,210.0	1,190.0	1,160.0
EPCO and its privately held affiliates [Member] | Distribution Reinvestment Plan [Member]
Relationship with Affiliates [Abstract]
Gross proceeds from the sale of common units		29.0	213.0
EPCO and its privately held affiliates [Member] | Administrative Services Agreement [Member]
Costs and expenses - related parties:
Operating costs and expenses	999.0	1,000.2	948.8
General and administrative expenses	128.9	127.6	124.2
Total costs and expenses - related parties	1,127.9	1,127.8	1,073.0
EPCO and its privately held affiliates [Member] | Related Party Operating Leases [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	$ 13.0	14.9	13.9
EPCO and its privately held affiliates [Member] | Common Units [Member]
Relationship with Affiliates [Abstract]
Number of Units (in units)	701,993,298
Percentage of total units outstanding	32.20%
Enterprise common units pledged as security (in units)	92,976,464
EPCO and its privately held affiliates [Member] | Preferred Units [Member]
Relationship with Affiliates [Abstract]
Number of Units (in units)	15,138
Percentage of total units outstanding	30.20%
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties	$ 36.7	67.3	107.7
Costs and expenses - related parties:
Total costs and expenses - related parties	203.1	403.1	447.4
Accounts receivable - related parties:
Total accounts receivable - related parties	3.7	2.5
Accounts payable - related parties:
Total accounts payable - related parties	9.9	18.6
Unconsolidated affiliates [Member] | Seaway Crude Holdings LLC [Member]
Revenues - related parties:
Total revenue - related parties	20.2	42.7	74.4
Costs and expenses - related parties:
Total costs and expenses - related parties	71.5	194.5	163.2
Unconsolidated affiliates [Member] | Venice Energy Service Company, L.L.C. [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	51.3	89.2	157.9
Unconsolidated affiliates [Member] | K/D/S Promix, L.L.C. [Member]
Revenues - related parties:
Total revenue - related parties	6.0	9.1	9.5
Costs and expenses - related parties:
Total costs and expenses - related parties	23.5	34.8	31.9
Unconsolidated affiliates [Member] | Texas Express Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	29.1	33.5	57.6
Unconsolidated affiliates [Member] | Eagle Ford Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	20.9	36.0	18.5
Unconsolidated affiliates [Member] | Management/Operator Fees [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	$ (10.1)	$ (9.9)	$ (11.6)