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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Related Party Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Revenues - related parties:
Total revenue - related parties	$ 6.1us-gaap_RevenueFromRelatedParties	$ 35.5us-gaap_RevenueFromRelatedParties
Costs and expenses - related parties:
Total costs and expenses - related parties	261.1	292.3
Accounts receivable - related parties:
Total accounts receivable - related parties	3.4us-gaap_DueFromRelatedPartiesCurrent		2.8us-gaap_DueFromRelatedPartiesCurrent
Accounts payable - related parties:
Total accounts payable - related parties	49.3us-gaap_DueToRelatedPartiesCurrent		118.9us-gaap_DueToRelatedPartiesCurrent
Related Party Transactions [Abstract]
Operating costs and expenses	232.1us-gaap_CostsAndExpensesRelatedParty	262.1us-gaap_CostsAndExpensesRelatedParty
General and administrative expenses	29.0	30.2
2013 At-the-Market Registration [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)	12,350,761
EPCO and affiliates [Member]
Costs and expenses - related parties:
Total costs and expenses - related parties	221.9	235.7
Accounts payable - related parties:
Total accounts payable - related parties	31.3		98.1
Distributions:
Total cash distributions	231.2	214.2
Related Party Transactions [Abstract]
Operating costs and expenses	191.1	203.7
General and administrative expenses	30.8	32.0
Relationship with Affiliates [Abstract]
Number of Units (in units)	687,946,688
Percentage of Total Units Outstanding (in hundredths)	34.60%
EPCO and affiliates [Member] \| 2013 At-the-Market Registration [Member]
Relationship with Affiliates [Abstract]
Number of common units issued (in units)	3,225,057
Offering price of common unit (in dollars per unit)	$ 31.01
Unconsolidated affiliates [Member]
Revenues - related parties:
Total revenue - related parties	6.1	35.5
Costs and expenses - related parties:
Total costs and expenses - related parties	39.2	56.6
Accounts receivable - related parties:
Total accounts receivable - related parties	3.4		2.8
Accounts payable - related parties:
Total accounts payable - related parties	$ 18.0		$ 20.8