COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS 3 (Details) - Sempra Renewables [Member] $ in Millions	Sep. 30, 2015 USD ($)
Operating Leases [Line Items]
Increase (Decrease) In Operating Lease Future Minimum Payments, Due Current	$ (1)
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Two Years	1
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Three Years	1
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Four Years	2
Increase (Decrease) In Operating Lease Future Minimum Payments, Due In Five Years	2
Increase (Decrease) In Operating Lease Future Minimum Payments, Due Thereafter	39
Increase (Decrease) In Operating Leases Amount	$ 44