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Quarterly Financial Data
 12 Months Ended
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Data
Quarterly Financial Data (unaudited) (EME, Midwest Generation)
The following table summarizes the unaudited quarterly statements of operations for EME.
(in millions)
First
 
Second
 
Third
 
Fourth
 
2013
 
 
 
 
 
 
 
 
Operating revenues
$
307

 
$
315

 
$
385

 
$
324

 
Operating loss
(47
)
 
(63
)
 
(431
)
1 

(38
)
 
Loss from continuing operations
(81
)
 
(102
)
 
(447
)
 
(12
)
 
Income (loss) from operations of discontinued subsidiaries, net of tax
(1
)
 
18

 
(1
)
 
(15
)
 
Net loss
$
(82
)
 
$
(84
)
 
$
(448
)
 
$
(27
)
 
2012
 
 
 
 
 
 
 
 
Operating revenues
$
343

 
$
324

 
$
340

 
$
280

 
Operating loss
(48
)
 
(98
)
 
(71
)
 
(111
)
 
Loss from continuing operations
(58
)
 
(75
)
 
(86
)
 
(578
)
 
Income (loss) from operations of discontinued subsidiaries, net of tax
(24
)
 
(29
)
 
(76
)
 
17

 
Net loss
$
(82
)
 
$
(104
)
 
$
(162
)
 
$
(561
)
 
1
Reflects a $464 million pre-tax ($297 million, after tax) impairment charge related to Will County. For more information, see Note 13—Asset Impairments and Other Charges.
The following table summarizes the unaudited quarterly statements of operations for Midwest Generation.
(in millions)
First
 
Second
 
Third
 
Fourth
 
2013
 
 
 
 
 
 
 
 
Operating revenues
$
179

 
$
203

 
$
232

 
$
203

 
Operating loss
(60
)
 
(40
)
 
(463
)
1 

(23
)
 
Provision (benefit) for income taxes
—

 
1

 
(1
)
 
(17
)
 
Net loss
$
(74
)
 
$
(74
)
 
$
(471
)
 
$
(14
)
 
2012
 
 
 
 
 
 
 
 
Operating revenues
$
233

 
$
213

 
$
253

 
$
193

 
Operating loss
(33
)
 
(88
)
 
(39
)
 
(1,437
)
2 

Benefit for income taxes
(5
)
 
(27
)
 
(7
)
 
(23
)
 
Net loss
$
(9
)
 
$
(42
)
 
$
(12
)
 
$
(1,401
)
 
1 
Reflects a $464 million pre-tax ($297 million, after tax) impairment charge related to Will County. For more information, see Note 13—Asset Impairments and Other Charges.
2 
Reflects a $1.4 billion pre-tax charge for a valuation allowance recorded by Midwest Generation on its note receivable from EME. For more information, see Note 15—Related Party Transactions.