Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2011
Trade accounts receivable, pledged amounts related to VIE	$ 573	$ 445
Short-term borrowings related to a VIE	$ 172	$ 82

Amount due to consolidated variable interest entities from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

No definition available.

Name:	efh_TradeAccountsReceivableFromVariableInterestEntity
Namespace Prefix:	efh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant