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EMPLOYEE BENEFIT PLANS PART 5 (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Cash And Cash Equivalents, Excluded From Fair Value of Defined Benefit Plan Assets $ 4 $ 4
Transfers Payable, Excluded From Fair Value of Defined Benefit Plan Assets   9
Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Cash And Cash Equivalents, Excluded From Fair Value of Defined Benefit Plan Assets 9 9
Transfers Receivable, Excluded From Fair Value of Defined Benefit Plan Assets   16
Other Postretirement Benefits
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Cash And Cash Equivalents, Excluded From Fair Value of Defined Benefit Plan Assets 3 122
Transfers Payable, Excluded From Fair Value of Defined Benefit Plan Assets   1
Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Cash And Cash Equivalents, Excluded From Fair Value of Defined Benefit Plan Assets   36
Transfers Payable, Excluded From Fair Value of Defined Benefit Plan Assets   2
Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Cash And Cash Equivalents, Excluded From Fair Value of Defined Benefit Plan Assets   86
Equity Securities, Broad Market Fund [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 316  
Equity Securities, Broad Market Fund [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 316  
Equity Securities, Foreign Preferred Large-Cap [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   1
Equity Securities, Foreign Preferred Large-Cap [Member] | Level 1 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   1
Equity Securities, Foreign Preferred [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2  
Equity Securities, Foreign Preferred [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 4 1
Equity Securities, Foreign Preferred [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   1
Equity Securities, Foreign Preferred [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1  
Equity Securities, Foreign Preferred [Member] | Level 1 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2  
Equity Securities, Foreign Preferred [Member] | Level 1 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 4 1
Equity Securities, Foreign Preferred [Member] | Level 1 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   1
Equity Securities, Foreign Preferred [Member] | Level 1 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1  
Equity Securities, Registered Investment Company [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 6 4
Equity Securities, Registered Investment Company [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 12 8
Equity Securities, Registered Investment Company [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 1
Equity Securities, Registered Investment Company [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 32 7
Equity Securities, Registered Investment Company [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 11 2
Equity Securities, Registered Investment Company [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 4  
Equity Securities, Registered Investment Company [Member] | Level 1 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 6 4
Equity Securities, Registered Investment Company [Member] | Level 1 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 12 8
Equity Securities, Registered Investment Company [Member] | Level 1 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 1
Equity Securities, Registered Investment Company [Member] | Level 1 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 32 7
Equity Securities, Registered Investment Company [Member] | Level 1 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 11 2
Equity Securities, Registered Investment Company [Member] | Level 1 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 3  
Equity Securities, Registered Investment Company [Member] | Level 2 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1  
US Government Agencies Debt Securities [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 12 9
US Government Agencies Debt Securities [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 24 18
US Government Agencies Debt Securities [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 3 2
US Government Agencies Debt Securities [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 3 4
US Government Agencies Debt Securities [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 3
US Government Agencies Debt Securities [Member] | Level 1 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 3  
US Government Agencies Debt Securities [Member] | Level 2 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 12 9
US Government Agencies Debt Securities [Member] | Level 2 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 24 18
US Government Agencies Debt Securities [Member] | Level 2 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 3 2
US Government Agencies Debt Securities [Member] | Level 2 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   4
US Government Agencies Debt Securities [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 3
Fixed Income, Registered Investment Company [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 12  
Fixed Income, Registered Investment Company [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1  
Fixed Income, Registered Investment Company [Member] | Level 2 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 12  
Fixed Income, Registered Investment Company [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1  
Foreign Government Debt Securities [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 22 25
Foreign Government Debt Securities [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 44 49
Foreign Government Debt Securities [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 5
Foreign Government Debt Securities [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 2
Foreign Government Debt Securities [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 8 9
Foreign Government Debt Securities [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 1
Foreign Government Debt Securities [Member] | Level 2 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 22 25
Foreign Government Debt Securities [Member] | Level 2 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 44 49
Foreign Government Debt Securities [Member] | Level 2 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 5
Foreign Government Debt Securities [Member] | Level 2 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 2
Foreign Government Debt Securities [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 8 9
Foreign Government Debt Securities [Member] | Level 2 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 1
Domestic Corporate Debt Securities [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 147 [1] 139 [1]
Domestic Corporate Debt Securities [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 297 275
Domestic Corporate Debt Securities [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 37 [1] 36 [1]
Domestic Corporate Debt Securities [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 15 12
Domestic Corporate Debt Securities [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 57 52
Domestic Corporate Debt Securities [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 [1] 4 [1]
Domestic Corporate Debt Securities [Member] | Level 2 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 147 [1] 139 [1]
Domestic Corporate Debt Securities [Member] | Level 2 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 297 275
Domestic Corporate Debt Securities [Member] | Level 2 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 37 [1] 36 [1]
Domestic Corporate Debt Securities [Member] | Level 2 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 15 12
Domestic Corporate Debt Securities [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 57 52
Domestic Corporate Debt Securities [Member] | Level 2 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 [1] 4 [1]
Foreign Corporate Debt Securities [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 52 48
Foreign Corporate Debt Securities [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 105 96
Foreign Corporate Debt Securities [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 13 12
Foreign Corporate Debt Securities [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 4
Foreign Corporate Debt Securities [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 20 18
Foreign Corporate Debt Securities [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 1
Foreign Corporate Debt Securities [Member] | Level 2 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 52 48
Foreign Corporate Debt Securities [Member] | Level 2 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 105 96
Foreign Corporate Debt Securities [Member] | Level 2 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 13 12
Foreign Corporate Debt Securities [Member] | Level 2 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 4
Foreign Corporate Debt Securities [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 20 18
Foreign Corporate Debt Securities [Member] | Level 2 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 1
Debt Securities, Common Collective Trusts [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 8 [2] 23 [2]
Debt Securities, Common Collective Trusts [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 15 46
Debt Securities, Common Collective Trusts [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 [2] 6 [2]
Debt Securities, Common Collective Trusts [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 2
Debt Securities, Common Collective Trusts [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 107 308
Debt Securities, Common Collective Trusts [Member] | Level 2 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 8 [2] 23 [2]
Debt Securities, Common Collective Trusts [Member] | Level 2 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 15 46
Debt Securities, Common Collective Trusts [Member] | Level 2 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 [2] 6 [2]
Debt Securities, Common Collective Trusts [Member] | Level 2 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 2
Debt Securities, Common Collective Trusts [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 107 308
Private Equity Funds [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 6 [3] 7 [3]
Private Equity Funds [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 13 16
Private Equity Funds [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 [3] 3 [3]
Private Equity Funds [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 1
Private Equity Funds [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 3
Private Equity Funds [Member] | Level 1 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   1
Private Equity Funds [Member] | Level 1 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   1 [3]
Private Equity Funds [Member] | Level 3 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 6 [3] 7 [3]
Private Equity Funds [Member] | Level 3 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 13 15
Private Equity Funds [Member] | Level 3 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 [3] 2 [3]
Private Equity Funds [Member] | Level 3 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 1
Private Equity Funds [Member] | Level 3 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 3
Total Investment Plan Assets [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 777 [4] 717 [5]
Total Investment Plan Assets [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1,572 1,418
Total Investment Plan Assets [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 126 72
Total Investment Plan Assets [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 729 569
Total Investment Plan Assets [Member] | Level 1 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 530 [4] 466 [5]
Total Investment Plan Assets [Member] | Level 1 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1,074 919
Total Investment Plan Assets [Member] | Level 1 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 87 47
Total Investment Plan Assets [Member] | Level 1 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 213 176
Total Investment Plan Assets [Member] | Level 2 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 241 [4] 244 [5]
Total Investment Plan Assets [Member] | Level 2 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 485 484
Total Investment Plan Assets [Member] | Level 2 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 38 24
Total Investment Plan Assets [Member] | Level 2 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 514 390
Total Investment Plan Assets [Member] | Level 3 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 6 [4] 7 [5]
Total Investment Plan Assets [Member] | Level 3 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 13 15
Total Investment Plan Assets [Member] | Level 3 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 1
Total Investment Plan Assets [Member] | Level 3 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 3
Total Other Sempra Energy Investment Plan Assets [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 195 [6] 183 [7]
Cash And Cash Equivalents, Excluded From Fair Value of Defined Benefit Plan Assets 1 [6] 1 [7]
Transfers Payable, Excluded From Fair Value of Defined Benefit Plan Assets   7 [7]
Total Other Sempra Energy Investment Plan Assets [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 15 15 [8]
Total Other Sempra Energy Investment Plan Assets [Member] | Level 1 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 133 [6] 120 [7]
Total Other Sempra Energy Investment Plan Assets [Member] | Level 1 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 10 9 [8]
Total Other Sempra Energy Investment Plan Assets [Member] | Level 2 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 60 [6] 61 [7]
Total Other Sempra Energy Investment Plan Assets [Member] | Level 2 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 6 [8]
Total Other Sempra Energy Investment Plan Assets [Member] | Level 3 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2 [6]  
Total Other Sempra Energy Investment Plan Assets [Member] | Level 3 | Total SE Consolidated [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents   2 [7]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Total SE Consolidated [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 2,544 [9] 2,318 [9]
Cash And Cash Equivalents, Excluded From Fair Value of Defined Benefit Plan Assets 14 [9] 14 [9]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Sempra Energy Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 870 [10],[8] 656 [11]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Level 1 | Total SE Consolidated [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1,737 [9] 1,505 [9]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Level 1 | Sempra Energy Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 310 [10],[8] 232 [11]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Level 2 | Total SE Consolidated [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 786 [9] 789 [9]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Level 2 | Sempra Energy Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 557 [10],[8] 420 [11]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Level 3 | Total SE Consolidated [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 21 [9] 24 [9]
Total Sempra Energy Consolidated Investment Plan Assets [Member] | Level 3 | Sempra Energy Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 3 [10],[8] 4 [11]
Equity Securities Domestic [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 307 [12] 283 [12]
Equity Securities Domestic [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 622 558
Equity Securities Domestic [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 77 [12] 72 [12]
Equity Securities Domestic [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 32 24
Equity Securities Domestic [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 118 107
Equity Securities Domestic [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 [12] 6 [12]
Equity Securities Domestic [Member] | Level 1 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 307 [12] 283 [12]
Equity Securities Domestic [Member] | Level 1 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 622 558
Equity Securities Domestic [Member] | Level 1 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 77 [12] 72 [12]
Equity Securities Domestic [Member] | Level 1 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 32 24
Equity Securities Domestic [Member] | Level 1 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 118 107
Equity Securities Domestic [Member] | Level 1 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 5 [12] 6 [12]
Equity Securities Foreign [Member] | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 215 178
Equity Securities Foreign [Member] | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 436 351
Equity Securities Foreign [Member] | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 54 45
Equity Securities Foreign [Member] | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 23 16
Equity Securities Foreign [Member] | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 84 67
Equity Securities Foreign [Member] | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 1 3
Equity Securities Foreign [Member] | Level 1 | Pension Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 215 178
Equity Securities Foreign [Member] | Level 1 | Pension Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 436 351
Equity Securities Foreign [Member] | Level 1 | Total Other SE [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 54 45
Equity Securities Foreign [Member] | Level 1 | Other Postretirement Benefits | San Diego Gas and Electric Company and Subsidiary [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 23 16
Equity Securities Foreign [Member] | Level 1 | Other Postretirement Benefits | Southern California Gas Company [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents 84 67
Equity Securities Foreign [Member] | Level 1 | All Other Postretirement Benefit Plans [Member]
   
Defined Benefit Plan, Fair Value Of Plan Assets [Line Items]    
Defined Benefit Plan, Fair Value Of Plan Assets, Excluding Cash And Cash Equivalents $ 1 $ 3
[1] Bonds of U.S. issuers from diverse industries, primarily investment-grade.
[2] Investments in common/collective trusts held in Sempra Energy’s Pension Master Trust.
[3] Investments in venture capital and real estate funds.
[4] Excludes cash and cash equivalents of $4 million.
[5] Excludes cash and cash equivalents of $4 million and transfers payable to other plans of $9 million.
[6] Excludes cash and cash equivalents of $1 million.
[7] Excludes cash and cash equivalents of $1 million and transfers payable to other plans of $7 million.
[8] Excludes transfers payable to other plans of $1 million.
[9] Excludes cash and cash equivalents of $14 million at both December 31, 2012 and 2011.
[10] Excludes cash and cash equivalents of $3 million, all of which is held in SoCalGas PBOP plan trusts.
[11] Excludes cash and cash equivalents of $122 million, $86 million and $36 million of which is held in SoCalGas and SDG&E
[12] Investments in common stock of domestic corporations.