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DERIVATIVE FINANCIAL INSTRUMENTS - BALANCE SHEET (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Current assets: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | $ 80,000,000 | $ 47,000,000
Additional margin posted for commodity contracts not subject to rate recovery | 19,000,000 | 2,000,000
Additional margin posted for commodity contracts subject to rate recovery | 33,000,000 | 17,000,000
Total | 132,000,000 | 66,000,000
Other assets: Sundry [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | 235,000,000 | 105,000,000
Additional margin posted for commodity contracts not subject to rate recovery | 0 | 0
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | 235,000,000 | 105,000,000
Current liabilities: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | (70,000,000) | (103,000,000)
Additional margin posted for commodity contracts not subject to rate recovery | 0 | 0
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | (70,000,000) | (103,000,000)
Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | (218,000,000) | (281,000,000)
Additional margin posted for commodity contracts not subject to rate recovery | 0 | 0
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | (218,000,000) | (281,000,000)
Designated as Hedging Instrument [Member] | Current assets: Other [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | 2,000,000 | 5,000,000
Designated as Hedging Instrument [Member] | Other assets: Sundry [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | 0 | 2,000,000
Designated as Hedging Instrument [Member] | Current liabilities: Other [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | (3,000,000) | (51,000,000)
Designated as Hedging Instrument [Member] | Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | (147,000,000) | (165,000,000)
Not Designated as Hedging Instrument [Member] | Current assets: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Foreign exchange instruments |  | 0
Commodity contracts not subject to rate recovery | 153,000,000 | 81,000,000
Associated offsetting commodity contracts not subject to rate recovery | (133,000,000) | (67,000,000)
Commodity contracts subject to rate recovery | 64,000,000 | 28,000,000
Associated offsetting commodity contracts subject to rate recovery | (6,000,000) | 0
Associated cash collateral commodity contracts subject to rate recovery | 0 | 0
Not Designated as Hedging Instrument [Member] | Other assets: Sundry [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Foreign exchange instruments |  | 0
Commodity contracts not subject to rate recovery | 7,000,000 | 8,000,000
Associated offsetting commodity contracts not subject to rate recovery | (3,000,000) | (5,000,000)
Commodity contracts subject to rate recovery | 233,000,000 | 101,000,000
Associated offsetting commodity contracts subject to rate recovery | (2,000,000) | (1,000,000)
Associated cash collateral commodity contracts subject to rate recovery | 0 | 0
Not Designated as Hedging Instrument [Member] | Current liabilities: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Foreign exchange instruments |  | (1,000,000)
Commodity contracts not subject to rate recovery | (164,000,000) | (72,000,000)
Associated offsetting commodity contracts not subject to rate recovery | 133,000,000 | 67,000,000
Commodity contracts subject to rate recovery | (42,000,000) | (65,000,000)
Associated offsetting commodity contracts subject to rate recovery | 6,000,000 | 0
Associated cash collateral commodity contracts subject to rate recovery | 0 | 19,000,000
Not Designated as Hedging Instrument [Member] | Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Foreign exchange instruments |  | 0
Commodity contracts not subject to rate recovery | (6,000,000) | (6,000,000)
Associated offsetting commodity contracts not subject to rate recovery | 3,000,000 | 5,000,000
Commodity contracts subject to rate recovery | (72,000,000) | (120,000,000)
Associated offsetting commodity contracts subject to rate recovery | 2,000,000 | 1,000,000
Associated cash collateral commodity contracts subject to rate recovery | 2,000,000 | 4,000,000
San Diego Gas and Electric Company [Member] | Current assets: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | 54,000,000 | 26,000,000
Additional margin posted for commodity contracts subject to rate recovery | 28,000,000 | 16,000,000
Total | 82,000,000 | 42,000,000
San Diego Gas and Electric Company [Member] | Other assets: Sundry [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | 231,000,000 | 100,000,000
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | 231,000,000 | 100,000,000
San Diego Gas and Electric Company [Member] | Current liabilities: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | (32,000,000) | (54,000,000)
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | (32,000,000) | (54,000,000)
San Diego Gas and Electric Company [Member] | Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | (68,000,000) | (118,000,000)
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | (68,000,000) | (118,000,000)
San Diego Gas and Electric Company [Member] | Designated as Hedging Instrument [Member] | Current assets: Other [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | 0 | 0
San Diego Gas and Electric Company [Member] | Designated as Hedging Instrument [Member] | Other assets: Sundry [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | 0 | 0
San Diego Gas and Electric Company [Member] | Designated as Hedging Instrument [Member] | Current liabilities: Other [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | (1,000,000) | (10,000,000)
San Diego Gas and Electric Company [Member] | Designated as Hedging Instrument [Member] | Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Derivative Instruments in Hedges, at Fair Value, Net [Abstract] |  |
Interest rate and foreign exchange instruments | 0 | (3,000,000)
San Diego Gas and Electric Company [Member] | Not Designated as Hedging Instrument [Member] | Current assets: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | 60,000,000 | 26,000,000
Associated offsetting commodity contracts subject to rate recovery | (6,000,000) | 0
Associated cash collateral commodity contracts subject to rate recovery | 0 | 0
San Diego Gas and Electric Company [Member] | Not Designated as Hedging Instrument [Member] | Other assets: Sundry [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | 233,000,000 | 101,000,000
Associated offsetting commodity contracts subject to rate recovery | (2,000,000) | (1,000,000)
Associated cash collateral commodity contracts subject to rate recovery | 0 | 0
San Diego Gas and Electric Company [Member] | Not Designated as Hedging Instrument [Member] | Current liabilities: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | (37,000,000) | (63,000,000)
Associated offsetting commodity contracts subject to rate recovery | 6,000,000 | 0
Associated cash collateral commodity contracts subject to rate recovery | 0 | 19,000,000
San Diego Gas and Electric Company [Member] | Not Designated as Hedging Instrument [Member] | Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | (72,000,000) | (120,000,000)
Associated offsetting commodity contracts subject to rate recovery | 2,000,000 | 1,000,000
Associated cash collateral commodity contracts subject to rate recovery | 2,000,000 | 4,000,000
Southern California Gas Company [Member] | Current assets: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | 4,000,000 | 2,000,000
Additional margin posted for commodity contracts subject to rate recovery | 5,000,000 | 1,000,000
Total | 9,000,000 | 3,000,000
Southern California Gas Company [Member] | Other assets: Sundry [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | 0 | 0
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | 0 | 0
Southern California Gas Company [Member] | Current liabilities: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | (5,000,000) | (2,000,000)
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | (5,000,000) | (2,000,000)
Southern California Gas Company [Member] | Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Net amount presented on balance sheet | 0 | 0
Additional margin posted for commodity contracts subject to rate recovery | 0 | 0
Total | 0 | 0
Southern California Gas Company [Member] | Not Designated as Hedging Instrument [Member] | Current assets: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | 4,000,000 | 2,000,000
Southern California Gas Company [Member] | Not Designated as Hedging Instrument [Member] | Other assets: Sundry [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | 0 | 0
Southern California Gas Company [Member] | Not Designated as Hedging Instrument [Member] | Current liabilities: Other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | (5,000,000) | (2,000,000)
Southern California Gas Company [Member] | Not Designated as Hedging Instrument [Member] | Deferred credits and other liabilities: Deferred credits and other [Member] |  |
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net [Abstract] |  |
Commodity contracts subject to rate recovery | $ 0 | $ 0

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