Related Party Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 15, 2015
Revenues - related parties:
Total revenue - related parties	$ 71.5	$ 65.9	$ 73.3
Costs and expenses - related parties:
Total costs and expenses - related parties	1,122.9	1,052.2	857.1
Accounts receivable - related parties:
Total accounts receivable - related parties	2.8	6.8
Accounts payable - related parties:
Total accounts payable - related parties	118.9	150.5
Related Party Transactions [Abstract]
Operating costs and expenses	992.1	937.9	765.7
General and administrative expenses	130.8	114.3	91.4
EPCO and affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	939.9	892.2	816.9
Accounts payable - related parties:
Total accounts payable - related parties	98.1	116.3
Distributions:
Total cash distributions	877.0	811.4	750.2
Related Party Transactions [Abstract]
Operating costs and expenses	801.7	770.7	719.4
General and administrative expenses	138.2	121.5	97.5
Relationship with Affiliates [Abstract]
Number of Units (in units)	684,721,631
Percentage of Total Units Outstanding (in hundredths)	35.30%
Enterprise common units pledged as security (in units)				180,000,000
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties	71.5	65.9	73.3
Costs and expenses - related parties:
Total costs and expenses - related parties	183.0	160.0	40.2
Accounts receivable - related parties:
Total accounts receivable - related parties	2.8	6.8
Accounts payable - related parties:
Total accounts payable - related parties	20.8	34.2
Unconsolidated affiliates [Member] | Seaway Crude Pipeline Company [Member]
Revenues - related parties:
Total revenue - related parties	29.4	41.3
Costs and expenses - related parties:
Total costs and expenses - related parties	130.8	132.4	18.1
Unconsolidated affiliates [Member] | K/D/S Promix, L.L.C. [Member]
Revenues - related parties:
Total revenue - related parties	11.1	9.8	7.8
Costs and expenses - related parties:
Total costs and expenses - related parties	25.8	28.1	27.4
Unconsolidated affiliates [Member] | Texas Express Pipeline LLC [Member]
Revenues - related parties:
Total revenue - related parties	9.1
Unconsolidated affiliates [Member] | Eagle Ford Pipeline LLC [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	25.8	5.4
Unconsolidated affiliates [Member] | Other investments in unconsolidated subsidiaries [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	24.5	21.8	19.4
Unconsolidated affiliates [Member] | Evangeline [Member]
Revenues - related parties:
Total revenue - related parties			$ 42.9