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Guarantees of Debt (Tables) (Power [Member])
 6 Months Ended
Jun. 30, 2013
Power [Member]
  
Schedule Of Financial Statements Of Guarantors
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Power
 
Guarantor
Subsidiaries
 
Other
Subsidiaries
 
Consolidating
Adjustments
 
Consolidated
 
 
 
Millions
 
 
Three Months Ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
1,535

 
$
34

 
$
(379
)
 
$
1,190

 
 
Operating Expenses
2

 
1,187

 
31

 
(379
)
 
841

 
 
Operating Income (Loss)
(2
)
 
348

 
3

 
—

 
349

 
 
Equity Earnings (Losses) of Subsidiaries
213

 
(2
)
 
—

 
(211
)
 
—

 
 
Other Income
10

 
35

 
—

 
(10
)
 
35

 
 
Other Deductions
(2
)
 
(9
)
 
—

 
1

 
(10
)
 
 
Other-Than-Temporary Impairments
—

 
(2
)
 
—

 
—

 
(2
)
 
 
Interest Expense
(26
)
 
(6
)
 
(6
)
 
9

 
(29
)
 
 
Income Tax Benefit (Expense)
11

 
(151
)
 
1

 
—

 
(139
)
 
 
Net Income (Loss)
$
204

 
$
213

 
$
(2
)
 
$
(211
)
 
$
204

 
 
Comprehensive Income (Loss)
$
197

 
$
198

 
$
—

 
$
(198
)
 
$
197

 
 
Three Months Ended June 30, 2012
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
1,329

 
$
31

 
$
(375
)
 
$
985

 
 
Operating Expenses
2

 
1,135

 
28

 
(376
)
 
789

 
 
Operating Income (Loss)
(2
)
 
194

 
3

 
1

 
196

 
 
Equity Earnings (Losses) of Subsidiaries
116

 
(1
)
 
—

 
(115
)
 
—

 
 
Other Income
11

 
39

 
—

 
(13
)
 
37

 
 
Other Deductions
—

 
(17
)
 
—

 
—

 
(17
)
 
 
Other-Than-Temporary Impairments
—

 
(7
)
 
—

 
—

 
(7
)
 
 
Interest Expense
(31
)
 
(10
)
 
(4
)
 
13

 
(32
)
 
 
Income Tax Benefit (Expense)
10

 
(82
)
 
—

 
(1
)
 
(73
)
 
 
Net Income (Loss)
$
104

 
$
116

 
$
(1
)
 
$
(115
)
 
$
104

 
 
Comprehensive Income (Loss)
$
86

 
$
91

 
$
(1
)
 
$
(90
)
 
$
86

 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Power
 
Guarantor
Subsidiaries
 
Other
Subsidiaries
 
Consolidating
Adjustments
 
Consolidated
 
 
 
Millions
 
 
Six Months Ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
3,338

 
$
67

 
$
(768
)
 
$
2,637

 
 
Operating Expenses
4

 
2,749

 
61

 
(767
)
 
2,047

 
 
Operating Income (Loss)
(4
)
 
589

 
6

 
(1
)
 
590

 
 
Equity Earnings (Losses) of
   Subsidiaries
362

 
(2
)
 
—

 
(360
)
 
—

 
 
Other Income
19

 
83

 
—

 
(20
)
 
82

 
 
Other Deductions
(10
)
 
(29
)
 
—

 
1

 
(38
)
 
 
Other-Than-Temporary
   Impairments
—

 
(4
)
 
—

 
—

 
(4
)
 
 
Interest Expense
(53
)
 
(16
)
 
(10
)
 
20

 
(59
)
 
 
Income Tax Benefit (Expense)
27

 
(259
)
 
2

 
—

 
(230
)
 
 
Net Income (Loss)
$
341

 
$
362

 
$
(2
)
 
$
(360
)
 
$
341

 
 
Comprehensive Income (Loss)
$
366

 
$
370

 
$
—

 
$
(370
)
 
$
366

 
 
Six Months Ended June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
Net Cash Provided By (Used In)
   Operating Activities
$
386

 
$
884

 
$
3

 
$
(419
)
 
$
854

 
 
Net Cash Provided By (Used In)
   Investing Activities
$
152

 
$
(411
)
 
$
—

 
$
204

 
$
(55
)
 
 
Net Cash Provided By (Used In)
   Financing Activities
$
(538
)
 
$
(476
)
 
$
(3
)
 
$
215

 
$
(802
)
 
 
Six Months Ended June 30, 2012
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
3,202

 
$
57

 
$
(713
)
 
$
2,546

 
 
Operating Expenses
—

 
2,568

 
55

 
(714
)
 
1,909

 
 
Operating Income (Loss)
—

 
634

 
2

 
1

 
637

 
 
Equity Earnings (Losses) of
   Subsidiaries
376

 
(4
)
 
—

 
(372
)
 
—

 
 
Other Income
24

 
70

 
—

 
(27
)
 
67

 
 
Other Deductions
(7
)
 
(25
)
 
—

 
—

 
(32
)
 
 
Other-Than-Temporary
   Impairments
—

 
(12
)
 
—

 
—

 
(12
)
 
 
Interest Expense
(60
)
 
(20
)
 
(8
)
 
26

 
(62
)
 
 
Income Tax Benefit (Expense)
24

 
(267
)
 
2

 
—

 
(241
)
 
 
Net Income (Loss)
$
357

 
$
376

 
$
(4
)
 
$
(372
)
 
$
357

 
 
Comprehensive Income (Loss)
$
383

 
$
388

 
$
(4
)
 
$
(384
)
 
$
383

 
 
Six Months Ended June 30, 2012
 
 
 
 
 
 
 
 
 
 
 
Net Cash Provided By (Used In)
   Operating Activities
$
301

 
$
902

 
$
3

 
$
(354
)
 
$
852

 
 
Net Cash Provided By (Used In)
   Investing Activities
$
365

 
$
(601
)
 
$
(23
)
 
$
70

 
$
(189
)
 
 
Net Cash Provided By (Used In)
   Financing Activities
$
(666
)
 
$
(310
)
 
$
19

 
$
284

 
$
(673
)
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Power
 
Guarantor
Subsidiaries
 
Other
Subsidiaries
 
Consolidating
Adjustments
 
Consolidated
 
 
 
Millions
 
 
As of June 30, 2013
 
 
 
 
 
 
 
 
 
 
 
Current Assets
$
3,981

 
$
8,288

 
$
844

 
$
(11,367
)
 
$
1,746

 
 
Property, Plant and Equipment, net
80

 
5,944

 
930

 
—

 
6,954

 
 
Investment in Subsidiaries
4,188

 
731

 
—

 
(4,919
)
 
—

 
 
Noncurrent Assets
189

 
1,750

 
56

 
(125
)
 
1,870

 
 
Total Assets
$
8,438

 
$
16,713

 
$
1,830

 
$
(16,411
)
 
$
10,570

 
 
Current Liabilities
$
583

 
$
10,443

 
$
891

 
$
(11,366
)
 
$
551

 
 
Noncurrent Liabilities
509

 
2,081

 
207

 
(124
)
 
2,673

 
 
Long-Term Debt
2,041

 
—

 
—

 
—

 
2,041

 
 
Member’s Equity
5,305

 
4,189

 
732

 
(4,921
)
 
5,305

 
 
Total Liabilities and Member’s Equity
$
8,438

 
$
16,713

 
$
1,830

 
$
(16,411
)
 
$
10,570

 
 
As of December 31, 2012
 
 
 
 
 
 
 
 
 
 
 
Current Assets
$
3,922

 
$
8,084

 
$
940

 
$
(10,712
)
 
$
2,234

 
 
Property, Plant and Equipment, net
80

 
5,988

 
950

 
—

 
7,018

 
 
Investment in Subsidiaries
4,317

 
733

 
—

 
(5,050
)
 
—

 
 
Noncurrent Assets
201

 
1,660

 
60

 
(141
)
 
1,780

 
 
Total Assets
$
8,520

 
$
16,465

 
$
1,950

 
$
(15,903
)
 
$
11,032

 
 
Current Liabilities
$
482

 
$
10,187

 
$
1,010

 
$
(10,712
)
 
$
967

 
 
Noncurrent Liabilities
559

 
1,960

 
207

 
(140
)
 
2,586

 
 
Long-Term Debt
2,040

 
—

 
—

 
—

 
2,040

 
 
Member’s Equity
5,439

 
4,318

 
733

 
(5,051
)
 
5,439

 
 
Total Liabilities and Member’s Equity
$
8,520

 
$
16,465

 
$
1,950

 
$
(15,903
)
 
$
11,032