Restructuring Activities	6 Months Ended
Restructuring Activities	Jun. 30, 2012
Restructuring and Related Activities [Abstract]
Restructuring Activities	Restructuring Activities At June 30, 2012, EME and its subsidiaries without contractual dividend restrictions had corporate cash and cash equivalents of $879 million, which includes Midwest Generation's cash and cash equivalents of $177 million. EME and Midwest Generation's previous revolving credit agreements have been terminated or expired and no longer are sources of liquidity. At June 30, 2012, EME had $3.7 billion of unsecured notes outstanding, $500 million of which mature in June 2013. EME is currently experiencing operating losses due to lower realized energy and capacity prices, higher fuel costs and lower generation at the Midwest Generation plants. Forward market prices indicate that these trends are expected to continue for a number of years. As a result, EME expects that it will incur further reductions in cash flow and losses in the current year and in subsequent years. A continuation of these adverse trends coupled with pending debt maturities and the need to retrofit its Midwest Generation plants to comply with governmental regulations will exhaust EME's liquidity. Consequently, EME will need to consider all options available to it, including potential sales of assets, restructuring, reorganization of its capital structure, or conservation of cash that would be otherwise applied to the payment of obligations. EME has entered into non-disclosure and engagement agreements with advisors representing certain of its unsecured bondholders for the purpose of engaging in discussions with such advisors and Edison International regarding EME's financial condition. Absent a restructuring of its obligations, based on current projections, EME is not expected to have sufficient liquidity to repay the $500 million debt obligation due in June 2013. As a result, EME may need to file for protection under Chapter 11 of the U.S. Bankruptcy Code. Under the applicable accounting standards, Edison International would no longer consolidate EME for financial reporting purposes if it filed for bankruptcy under Chapter 11 of the U.S. Bankruptcy Code, as Edison International would no longer have a controlling financial interest for accounting purposes. In order to deconsolidate EME for financial reporting purposes, the carrying values of the assets and liabilities of EME would be removed from Edison International's consolidated balance sheets as of the bankruptcy filing date and the investment in EME would be recorded at its estimated fair value. Any loss would be recognized in an amount equal to the excess of the book value of Edison International's investment in EME over the fair value of such investment. At June 30, 2012, the book value of Edison International's investment in EME was $1.4 billion. Edison International would record any liabilities due to EME and certain liabilities that are joint and several with EME, including liabilities for uncertain tax positions taken in consolidated or combined tax returns of Edison International that are otherwise not resolved through the tax-allocation agreement and certain retirement plans.

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

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