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GENERAL (Tables)
3 Months Ended
Sep. 30, 2012
General (Tables) [Abstract]  
Schedule Of Effective Change In Accounting Principle [Text Block]
EFFECT OF CHANGE IN ACCOUNTING PRINCIPLE – SEMPRA ENERGY CONSOLIDATED
(Dollars in millions, except per share amounts)      
  Three months ended September 30, 2011
   As    
   Originally   Retrospectively
  Reported Adjustments Adjusted
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS      
Income tax expense$68$7$75
Net income 326 (7) 319
Earnings 296 (7) 289
        
Basic earnings per common share$1.23$(0.02)$1.21
Diluted earnings per common share$1.22$(0.02)$1.20
        
  Nine months ended September 30, 2011
   As    
   Originally   Retrospectively
  Reported Adjustments Adjusted
CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS      
Depreciation and amortization$730$(1)$729
Income before income taxes and equity earnings      
of certain unconsolidated subsidiaries 1,316 1 1,317
Income tax expense 269 20 289
Net income 1,092 (19) 1,073
Earnings 1,065 (19) 1,046
        
Basic earnings per common share$4.44$(0.08)$4.36
Diluted earnings per common share$4.40$(0.08)$4.32
        
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS      
Net income$1,092$(19)$1,073
Adjustments to reconcile net income to net cash provided by      
operating activities:      
Depreciation and amortization 730 (1) 729
Deferred income taxes and investment tax credits 224 (13) 211
Net change in other working capital components (income taxes) (108) 33 (75)
        
  As of December 31, 2011
   As    
   Originally   Retrospectively
  Reported Adjustments Adjusted
CONDENSED CONSOLIDATED BALANCE SHEET      
Property, plant and equipment$31,303$(111)$31,192
Less accumulated depreciation and amortization (7,731) 4 (7,727)
Property, plant and equipment, net$23,572$(107)$23,465
        
Income taxes payable$16$(11)$5
Deferred income taxes, noncurrent liability 1,554 (34) 1,520
Deferred credits and other 773 1 774
Retained earnings(1) 8,225 (63) 8,162
(1)Adjustment includes the cumulative effect of the change in accounting principle of reductions in net income and earnings of $26 million, $30 million, a negligible amount, and $7 million for the years ended December 31, 2011, 2010, 2009 and 2008, respectively.