Discontinued Operations (Textual) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
Homer City
|
Sep. 30, 2012
Homer City
|
Dec. 31, 2011
Homer City
|
Dec. 31, 2012
Pension Plans
|
Dec. 31, 2011
Pension Plans
|
Dec. 31, 2012
Edison Mission Energy
|
Dec. 31, 2012
Edison Mission Energy
Pension Plans
|
Dec. 31, 2012
Plan Support Agreement
|
|||||
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||||||||||||||
Number of days after bankruptcy filing for settlement transaction (days) | 150 days | |||||||||||||
Number of days for completion of settlement transaction agreement from petition date (days) | 210 days | |||||||||||||
Impairment and other charges | $ 89 | $ 113 | $ 1,030 | |||||||||||
Other charges to write down assets held for sale to net realizable value, net of tax | 53 | 68 | ||||||||||||
Investments in subsidiaries | 2 | 2 | 0 | |||||||||||
Retirement liabilities for EME employees | 2,614 | 2,715 | 1,387 | 1,329 | 80 | |||||||||
Joint tax liability | 183 | |||||||||||||
Receivables from EME | 207 | 229 | ||||||||||||
Deconsolidated charges recorded in other comprehensive income | 34 | [1] | 0 | [1] | 34 | |||||||||
Net receivable under plan support agreement | 46 | |||||||||||||
Retirement liabilities assumed under plan support agreement | 104 | |||||||||||||
Estimated loss under plan support agreement | $ 150 | |||||||||||||
|