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DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details)
9 Months Ended
Sep. 30, 2016
USD ($)
lender
line_of_credit
Sep. 29, 2016
USD ($)
Dec. 31, 2015
Sempra Energy Consolidated [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity $ 4,300,000,000.0    
Number of primary lines of credit | line_of_credit 3    
Remaining borrowing capacity $ 2,000,000,000    
Weighted average interest rate on total short-term debt outstanding 1.19%   1.09%
Foreign Operations [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity $ 1,100,000,000    
Remaining borrowing capacity 429,000,000    
Sempra Energy [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity $ 1,000,000,000    
Term of debt agreement 5 years    
Number of Lenders | lender 21    
Maximum percentage held by lenders participating syndicated lending agreement 7.00%    
Maximum ratio of indebtedness to total capitalization 65.00%    
Capacity for issuance of letters of credit $ 400,000,000    
Outstanding commercial paper supported by committed lines of credit 0    
Sempra Global [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity 2,340,000,000.00 $ 2,210,000,000.00  
Remaining borrowing capacity $ 79,000,000    
Term of debt agreement 5 years    
Number of Lenders | lender 21    
Maximum percentage held by lenders participating syndicated lending agreement 7.00%    
Maximum ratio of indebtedness to total capitalization 65.00%    
Outstanding commercial paper supported by committed lines of credit $ 2,260,000,000    
California Utilities Combined [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity $ 1,000,000,000    
Term of debt agreement 5 years    
Number of Lenders | lender 21    
Maximum percentage held by lenders participating syndicated lending agreement 7.00%    
Capacity for issuance of letters of credit $ 250,000,000    
SDGE [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity 750,000,000    
Remaining borrowing capacity $ 696,000,000    
Maximum ratio of indebtedness to total capitalization 65.00%    
Outstanding commercial paper supported by committed lines of credit $ 54,000,000    
Weighted average interest rate on total short-term debt outstanding 1.06%   1.01%
Southern California Gas Company [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity $ 750,000,000    
Remaining borrowing capacity $ 750,000,000    
Maximum ratio of indebtedness to total capitalization 65.00%    
Outstanding commercial paper supported by committed lines of credit $ 0    
Sempra South American Utilities [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity 506,000,000    
Sempra South American Utilities [Member] | Chile [Member]      
Line of Credit Facility [Line Items]      
Remaining borrowing capacity 114,000,000    
Committed lines of credit outstanding borrowings 0    
Sempra South American Utilities [Member] | Peru [Member]      
Line of Credit Facility [Line Items]      
Remaining borrowing capacity $ 236,000,000    
Committed lines of credit, maximum ratio of debt to equity 170.00%    
Committed lines of credit outstanding borrowings $ 140,000,000    
Bank guarantee 16,000,000    
Sempra Mexico [Member]      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity 600,000,000    
Remaining borrowing capacity $ 79,000,000    
Term of debt agreement 5 years    
Committed lines of credit outstanding borrowings $ 521,000,000