Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenues - related parties:
Total revenue - related parties	$ 55.6	$ 9.9	$ 80.3	$ 20.7
Costs and expenses - related parties:
Total costs and expenses - related parties	408.2	302.3	758.3	583.6
Accounts receivable - related parties:
Total accounts receivable - related parties	2.0		2.0		$ 1.8
Accounts payable - related parties:
Total accounts payable - related parties	85.6		85.6		127.3
Related Party Transactions [Abstract]
Operating costs and expenses	377.7	272.6	696.1	524.2
General and administrative expenses	30.5	29.7	62.2	59.4
EPCO and its privately held affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	260.2	247.4	516.9	490.5
Accounts payable - related parties:
Total accounts payable - related parties	$ 57.0		57.0		99.3
Distributions:
Total cash distributions			$ 576.3	553.7
Relationship with Affiliates [Abstract]
Total Number of Units (in units)	693,530,754		693,530,754
Percentage of Total Units Outstanding	32.00%		32.00%
Enterprise common units pledged as security (in units)	108,222,618		108,222,618
EPCO and its privately held affiliates [Member] | Distribution Reinvestment Plan [Member]
Relationship with Affiliates [Abstract]
Gross proceeds from the sale 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	$ 256.4	243.0	508.6	481.4
Related Party Transactions [Abstract]
Operating costs and expenses	228.0	215.9	451.0	427.5
General and administrative expenses	28.4	27.1	57.6	53.9
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties	55.6	9.9	80.3	20.7
Costs and expenses - related parties:
Total costs and expenses - related parties	148.0	$ 54.9	241.4	$ 93.1
Accounts receivable - related parties:
Total accounts receivable - related parties	2.0		2.0		1.8
Accounts payable - related parties:
Total accounts payable - related parties	$ 28.6		$ 28.6		$ 28.0