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COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS 4 (Details) (Power Purchase Agreements [Member], San Diego Gas and Electric Company and Subsidiary [Member], USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Power Purchase Agreements [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
 
Capital Leases [Line Items]  
Increase (Decrease) In Capital Leases Payments, Due Current $ (16)
Increase (Decrease) In Capital Leases Payments, Due In Two Years 7
Increase (Decrease) In Capital Leases Payments, Due In Three Years 7
Increase (Decrease) In Capital Leases Payments, Due In Four Years 7
Increase (Decrease) In Capital Leases Payments, Due In Five Years 7
Increase (Decrease) In Capital Leases Payments, Due Thereafter 155
Capital Lease Obligations $ 60