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Subsequent Event	6 Months Ended
	Jun. 30, 2016
Subsequent Event [Abstract]
Subsequent Event	Note 17.  Subsequent Event In July 2015, we purchased EFS Midstream from affiliates of Pioneer and Reliance for approximately $2.1 billion, which was payable in two installments.  The initial payment of $1.1 billion was paid at closing on July 8, 2015.   The second and final installment of $1.0 billion was paid on July 11, 2016 using a combination of cash on hand and proceeds from the issuance of short-term notes under EPO's commercial paper program.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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