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Guarantees of Debt (Tables)
 6 Months Ended
Jun. 30, 2015
Power [Member]  
Debt Instrument [Line Items]  
Schedule Of Financial Statements Of Guarantors
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Power
 
Guarantor
Subsidiaries
 
Other
Subsidiaries
 
Consolidating
Adjustments
 
Consolidated
 
 
 
Millions
 
 
Three Months Ended June 30, 2015
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
1,012

 
$
39

 
$
(26
)
 
$
1,025

 
 
Operating Expenses
(1
)
 
787

 
37

 
(26
)
 
797

 
 
Operating Income (Loss)
1

 
225

 
2

 
—

 
228

 
 
Equity Earnings (Losses) of Subsidiaries
186

 
(1
)
 
5

 
(185
)
 
5

 
 
Other Income
12

 
55

 
—

 
(12
)
 
55

 
 
Other Deductions
(1
)
 
(6
)
 
—

 
—

 
(7
)
 
 
Other-Than-Temporary Impairments
—

 
(10
)
 
—

 
—

 
(10
)
 
 
Interest Expense
(33
)
 
(7
)
 
(5
)
 
12

 
(33
)
 
 
Income Tax Benefit (Expense)
1

 
(73
)
 
—

 
—

 
(72
)
 
 
Net Income (Loss)
$
166

 
$
183

 
$
2

 
$
(185
)
 
$
166

 
 
Comprehensive Income (Loss)
$
159

 
$
169

 
$
2

 
$
(171
)
 
$
159

 
 
Six Months Ended June 30, 2015
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
2,727

 
$
107

 
$
(84
)
 
$
2,750

 
 
Operating Expenses
4

 
1,918

 
100

 
(84
)
 
1,938

 
 
Operating Income (Loss)
(4
)
 
809

 
7

 
—

 
812

 
 
Equity Earnings (Losses) of Subsidiaries
535

 
(2
)
 
8

 
(533
)
 
8

 
 
Other Income
23

 
85

 
—

 
(24
)
 
84

 
 
Other Deductions
(1
)
 
(17
)
 
—

 
—

 
(18
)
 
 
Other-Than-Temporary Impairments
—

 
(15
)
 
—

 
—

 
(15
)
 
 
Interest Expense
(62
)
 
(16
)
 
(10
)
 
24

 
(64
)
 
 
Income Tax Benefit (Expense)
10

 
(315
)
 
(1
)
 
—

 
(306
)
 
 
Net Income (Loss)
$
501

 
$
529

 
$
4

 
$
(533
)
 
$
501

 
 
Comprehensive Income (Loss)
$
506

 
$
520

 
$
4

 
$
(524
)
 
$
506

 
 
Six Months Ended June 30, 2015
 
 
 
 
 
 
 
 
 
 
 
Net Cash Provided By (Used In)
   Operating Activities
$
410

 
$
1,508

 
$
61

 
$
(687
)
 
$
1,292

 
 
Net Cash Provided By (Used In)
   Investing Activities
$
(480
)
 
$
(963
)
 
$
(210
)
 
$
766

 
$
(887
)
 
 
Net Cash Provided By (Used In)
   Financing Activities
$
70

 
$
(543
)
 
$
150

 
$
(79
)
 
$
(402
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Power
 
Guarantor
Subsidiaries
 
Other
Subsidiaries
 
Consolidating
Adjustments
 
Consolidated
 
 
 
Millions
 
 
Three Months Ended June 30, 2014
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
972

 
$
42

 
$
(28
)
 
$
986

 
 
Operating Expenses
5

 
903

 
40

 
(29
)
 
919

 
 
Operating Income (Loss)
(5
)
 
69

 
2

 
1

 
67

 
 
Equity Earnings (Losses) of Subsidiaries
57

 
(3
)
 
3

 
(54
)
 
3

 
 
Other Income
8

 
47

 
—

 
(9
)
 
46

 
 
Other Deductions
—

 
(8
)
 
—

 
(1
)
 
(9
)
 
 
Other-Than-Temporary
   Impairments
—

 
(2
)
 
—

 
—

 
(2
)
 
 
Interest Expense
(27
)
 
(6
)
 
(5
)
 
9

 
(29
)
 
 
Income Tax Benefit (Expense)
21

 
(43
)
 
—

 
—

 
(22
)
 
 
Net Income (Loss)
$
54

 
$
54

 
$
—

 
$
(54
)
 
$
54

 
 
Comprehensive Income (Loss)
$
67

 
$
66

 
$
—

 
$
(66
)
 
$
67

 
 
Six Months Ended June 30, 2014
 
 
 
 
 
 
 
 
 
 
 
Operating Revenues
$
—

 
$
2,656

 
$
82

 
$
(52
)
 
$
2,686

 
 
Operating Expenses
9

 
2,307

 
74

 
(53
)
 
2,337

 
 
Operating Income (Loss)
(9
)
 
349

 
8

 
1

 
349

 
 
Equity Earnings (Losses) of Subsidiaries
234

 
(3
)
 
7

 
(231
)
 
7

 
 
Other Income
16

 
80

 
—

 
(17
)
 
79

 
 
Other Deductions
(4
)
 
(14
)
 
—

 
(1
)
 
(19
)
 
 
Other-Than-Temporary Impairments
—

 
(4
)
 
—

 
—

 
(4
)
 
 
Interest Expense
(55
)
 
(13
)
 
(10
)
 
17

 
(61
)
 
 
Income Tax Benefit (Expense)
36

 
(168
)
 
(1
)
 
—

 
(133
)
 
 
Net Income (Loss)
$
218

 
$
227

 
$
4

 
$
(231
)
 
$
218

 
 
Comprehensive Income (Loss)
$
237

 
$
242

 
$
4

 
$
(246
)
 
$
237

 
 
Six Months Ended June 30, 2014
 
 
 
 
 
 
 
 
 
 
 
Net Cash Provided By (Used In)
   Operating Activities
$
292

 
$
950

 
$
32

 
$
(460
)
 
$
814

 
 
Net Cash Provided By (Used In)
   Investing Activities
$
138

 
$
(415
)
 
$
(16
)
 
$
57

 
$
(236
)
 
 
Net Cash Provided By (Used In)
   Financing Activities
$
(430
)
 
$
(534
)
 
$
(17
)
 
$
403

 
$
(578
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Power
 
Guarantor
Subsidiaries
 
Other
Subsidiaries
 
Consolidating
Adjustments
 
Consolidated
 
 
 
Millions
 
 
As of June 30, 2015
 
 
 
 
 
 
 
 
 
 
 
Current Assets
$
4,613

 
$
1,678

 
$
136

 
$
(4,216
)
 
$
2,211

 
 
Property, Plant and Equipment, net
80

 
6,290

 
1,337

 
—

 
7,707

 
 
Investment in Subsidiaries
4,409

 
289

 
—

 
(4,698
)
 
—

 
 
Noncurrent Assets
258

 
2,026

 
132

 
(168
)
 
2,248

 
 
Total Assets
$
9,360

 
$
10,283

 
$
1,605

 
$
(9,082
)
 
$
12,166

 
 
Current Liabilities
$
987

 
$
3,532

 
$
774

 
$
(4,216
)
 
$
1,077

 
 
Noncurrent Liabilities
465

 
2,534

 
350

 
(168
)
 
3,181

 
 
Long-Term Debt
2,244

 
—

 
—

 
—

 
2,244

 
 
Member's Equity
5,664

 
4,217

 
481

 
(4,698
)
 
5,664

 
 
Total Liabilities and Member's Equity
$
9,360

 
$
10,283

 
$
1,605

 
$
(9,082
)
 
$
12,166

 
 
As of December 31, 2014
 
 
 
 
 
 
 
 
 
 
 
Current Assets
$
4,263

 
$
2,037

 
$
150

 
$
(4,091
)
 
$
2,359

 
 
Property, Plant and Equipment, net
81

 
6,265

 
1,169

 
—

 
7,515

 
 
Investment in Subsidiaries
4,516

 
120

 
—

 
(4,636
)
 
—

 
 
Noncurrent Assets
278

 
1,952

 
137

 
(195
)
 
2,172

 
 
Total Assets
$
9,138

 
$
10,374

 
$
1,456

 
$
(8,922
)
 
$
12,046

 
 
Current Liabilities
$
883

 
$
3,606

 
$
786

 
$
(4,091
)
 
$
1,184

 
 
Noncurrent Liabilities
454

 
2,442

 
360

 
(195
)
 
3,061

 
 
Long-Term Debt
2,243

 
—

 
—

 
—

 
2,243

 
 
Member's Equity
5,558

 
4,326

 
310

 
(4,636
)
 
5,558

 
 
Total Liabilities and Member's Equity
$
9,138

 
$
10,374

 
$
1,456

 
$
(8,922
)
 
$
12,046