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EMPLOYEE BENEFIT PLANS - EMPLOYEE BENEFIT PLANS (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent liabilities | $ (1,161,000,000) | $ (1,148,000,000) |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Expected return on plan assets | 7.00% |  |
Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Beginning balance | $ 3,857,000,000 | 3,679,000,000 |
Service cost | 124,000,000 | 117,000,000 | $ 107,000,000
Interest cost | 141,000,000 | 151,000,000 | 160,000,000
Contributions from plan participants | 0 | 0 |
Actuarial (gain) loss | (269,000,000) | 286,000,000 |
Plan amendments | 12,000,000 | 1,000,000 |
Benefit payments | (115,000,000) | (182,000,000) |
Special termination benefits | 0 | 0 |
Acquisition | 0 | 0 |
Curtailments | 0 | (1,000,000) |
Settlements | (394,000,000) | (194,000,000) | (75,000,000)
Ending balance | 3,356,000,000 | 3,857,000,000 | 3,679,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Actual return on plan assets | (180,000,000) | 421,000,000 |
Employer contributions | 190,000,000 | 155,000,000 |
Contributions from plan participants | 0 | 0 |
Benefit payments | (115,000,000) | (182,000,000) |
Settlements | (394,000,000) | (194,000,000) |
Ending balance | 2,160,000,000 | 2,659,000,000 | 2,459,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded status | (1,196,000,000) | (1,198,000,000) |
Net recorded (liability) asset at December 31 | (1,196,000,000) | (1,198,000,000) |
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent assets | 0 | 0 |
Current liabilities | (65,000,000) | (69,000,000) |
Noncurrent liabilities | (1,131,000,000) | (1,129,000,000) |
Net recorded (liability) asset | (1,196,000,000) | (1,198,000,000) |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract] |  |  |
Net actuarial (loss) gain | (114,000,000) | (84,000,000) |
Prior service cost | (12,000,000) | (4,000,000) |
Total | (126,000,000) | (88,000,000) |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Projected benefit obligation | 3,130,000,000 | 3,623,000,000 |
Accumulated benefit obligation | 2,894,000,000 | 3,334,000,000 |
Fair value of plan assets | 2,160,000,000 | 2,659,000,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |
Service cost | 124,000,000 | 117,000,000 | 107,000,000
Interest cost | 141,000,000 | 151,000,000 | 160,000,000
Expected return on assets | (157,000,000) | (161,000,000) | (166,000,000)
Amortization of Prior service cost (credit) | 11,000,000 | 11,000,000 | 11,000,000
Amortization of actuarial loss (gain) | 23,000,000 | 36,000,000 | 30,000,000
Settlement charges | 66,000,000 | 38,000,000 | 16,000,000
Special termination benefits | 0 | 0 | 0
Net periodic benefit cost | 208,000,000 | 192,000,000 | 158,000,000
Regulatory adjustment | (30,000,000) | (42,000,000) | (57,000,000)
Total expense recognized | 178,000,000 | 150,000,000 | 101,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] |  |  |
Net loss (gain) | 56,000,000 | 0 | 26,000,000
Prior service cost | 12,000,000 | 1,000,000 | 0
Amortization of actuarial loss | (12,000,000) | (10,000,000) | (10,000,000)
Amortization of prior service cost | (2,000,000) | (1,000,000) | (1,000,000)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax | (12,000,000) | (8,000,000) | 0
Total recognized in OCI | 42,000,000 | (18,000,000) | 15,000,000
Total recognized in net periodic benefit cost and OCI | $ 220,000,000 | $ 132,000,000 | $ 116,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 4.30% | 3.65% |
Interest crediting rate | 3.36% | 2.80% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 3.65% | 4.08% | 4.46%
Expected return on plan assets | 7.00% | 7.00% | 7.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate | 2.80% | 2.86% | 3.03%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] |  |  |
Expected employer contributions | $ 228,000,000 |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2019 | 416,000,000 |  |
2020 | 270,000,000 |  |
2021 | 268,000,000 |  |
2022 | 246,000,000 |  |
2023 | 236,000,000 |  |
2024-2028 | $ 1,097,000,000 |  |
Pension Plan [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% | 10.00%
Pension Plan [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% | 2.00%
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Beginning balance | $ 963,000,000 | $ 922,000,000 |
Service cost | 21,000,000 | 21,000,000 | $ 20,000,000
Interest cost | 36,000,000 | 39,000,000 | 42,000,000
Contributions from plan participants | 23,000,000 | 20,000,000 |
Actuarial (gain) loss | (123,000,000) | 6,000,000 |
Plan amendments | 0 | 0 |
Benefit payments | (74,000,000) | (63,000,000) |
Special termination benefits | 5,000,000 | 18,000,000 | 26,000,000
Acquisition | 21,000,000 | 0 |
Curtailments | 0 | 0 |
Settlements | 0 | 0 |
Ending balance | 872,000,000 | 963,000,000 | 922,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Actual return on plan assets | (56,000,000) | 185,000,000 |
Employer contributions | 6,000,000 | 10,000,000 |
Contributions from plan participants | 23,000,000 | 20,000,000 |
Benefit payments | (74,000,000) | (63,000,000) |
Settlements | 0 | 0 |
Ending balance | 1,108,000,000 | 1,209,000,000 | 1,057,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded status | 236,000,000 | 246,000,000 |
Net recorded (liability) asset at December 31 | 236,000,000 | 246,000,000 |
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent assets | 272,000,000 | 266,000,000 |
Current liabilities | (6,000,000) | (1,000,000) |
Noncurrent liabilities | (30,000,000) | (19,000,000) |
Net recorded (liability) asset | 236,000,000 | 246,000,000 |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract] |  |  |
Net actuarial (loss) gain | 8,000,000 | 4,000,000 |
Prior service cost | 0 | 0 |
Total | 8,000,000 | 4,000,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |
Service cost | 21,000,000 | 21,000,000 | 20,000,000
Interest cost | 36,000,000 | 39,000,000 | 42,000,000
Expected return on assets | (70,000,000) | (66,000,000) | (69,000,000)
Amortization of Prior service cost (credit) | 1,000,000 | 1,000,000 | 0
Amortization of actuarial loss (gain) | (6,000,000) | (4,000,000) | (1,000,000)
Settlement charges | 0 | 0 | 0
Special termination benefits | 5,000,000 | 18,000,000 | 26,000,000
Net periodic benefit cost | (13,000,000) | 9,000,000 | 18,000,000
Regulatory adjustment | 17,000,000 | 0 | (11,000,000)
Total expense recognized | 4,000,000 | 9,000,000 | 7,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] |  |  |
Net loss (gain) | (4,000,000) | (2,000,000) | (2,000,000)
Prior service cost | 0 | 0 | 0
Amortization of actuarial loss | 0 | 0 | 0
Amortization of prior service cost | 0 | 0 | 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax | 0 | 0 | 0
Total recognized in OCI | (4,000,000) | (2,000,000) | (2,000,000)
Total recognized in net periodic benefit cost and OCI | $ 0 | $ 7,000,000 | $ 5,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 4.30% | 3.70% |
Interest crediting rate | 3.36% | 2.80% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 3.70% | 4.19% | 4.49%
Expected return on plan assets | 6.49% | 6.47% | 6.98%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate | 2.80% | 2.86% | 3.03%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] |  |  |
Expected employer contributions | $ 10,000,000 |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2019 | 54,000,000 |  |
2020 | 51,000,000 |  |
2021 | 52,000,000 |  |
2022 | 52,000,000 |  |
2023 | 52,000,000 |  |
2024-2028 | $ 257,000,000 |  |
Other Postretirement Benefits Plan [Member] | Pre-65Retiree [Member] |  |  |
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract] |  |  |
Health care cost trend rate assumed for next year | 6.50% | 7.00% | 8.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend) | 4.75% | 5.00% | 5.00%
Other Postretirement Benefits Plan [Member] | Retiree Aged 65 or Older [Member] |  |  |
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract] |  |  |
Health care cost trend rate assumed for next year | 4.75% | 5.00% | 5.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend) | 4.50% | 4.50% | 4.50%
Other Postretirement Benefits Plan [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% | 10.00%
Other Postretirement Benefits Plan [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% | 2.00%
Southern California Gas Company [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Beginning balance | $ 2,486,000,000 | $ 2,343,000,000 |
Service cost | 81,000,000 | 76,000,000 | $ 67,000,000
Interest cost | 92,000,000 | 98,000,000 | 101,000,000
Contributions from plan participants | 0 | 0 |
Actuarial (gain) loss | (215,000,000) | 216,000,000 |
Benefit payments | (65,000,000) | (73,000,000) |
Special termination benefits | 0 | 0 |
Settlements | (231,000,000) | (175,000,000) |
Transfer of liability from other plans | 0 | 1,000,000 |
Ending balance | 2,148,000,000 | 2,486,000,000 | 2,343,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Actual return on plan assets | (117,000,000) | 269,000,000 |
Employer contributions | 104,000,000 | 93,000,000 |
Contributions from plan participants | 0 | 0 |
Benefit payments | (65,000,000) | (73,000,000) |
Settlements | (231,000,000) | (175,000,000) |
Transfer of assets from other plans | 0 | 1,000,000 |
Ending balance | 1,385,000,000 | 1,694,000,000 | 1,579,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded status | (763,000,000) | (792,000,000) |
Net recorded (liability) asset at December 31 | (763,000,000) | (792,000,000) |
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent assets | 0 | 0 |
Current liabilities | (3,000,000) | (3,000,000) |
Noncurrent liabilities | (760,000,000) | (789,000,000) |
Net recorded (liability) asset | (763,000,000) | (792,000,000) |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract] |  |  |
Net actuarial (loss) gain | (6,000,000) | (6,000,000) |
Prior service cost | (2,000,000) | (2,000,000) |
Total | (8,000,000) | (8,000,000) |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Projected benefit obligation | 2,123,000,000 | 2,462,000,000 |
Accumulated benefit obligation | 1,919,000,000 | 2,220,000,000 |
Fair value of plan assets | 1,385,000,000 | 1,694,000,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |
Service cost | 81,000,000 | 76,000,000 | 67,000,000
Interest cost | 92,000,000 | 98,000,000 | 101,000,000
Expected return on assets | (98,000,000) | (103,000,000) | (103,000,000)
Amortization of Prior service cost (credit) | 8,000,000 | 9,000,000 | 9,000,000
Amortization of actuarial loss (gain) | 13,000,000 | 19,000,000 | 11,000,000
Settlement charges | 32,000,000 | 30,000,000 | 0
Special termination benefits | 0 | 0 | 0
Net periodic benefit cost | 128,000,000 | 129,000,000 | 85,000,000
Regulatory adjustment | (22,000,000) | (34,000,000) | (12,000,000)
Total expense recognized | 106,000,000 | 95,000,000 | 73,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] |  |  |
Net loss (gain) | 1,000,000 | 0 | 4,000,000
Prior service cost | 0 | 0 | 2,000,000
Amortization of prior service cost | (1,000,000) | (1,000,000) | 0
Total recognized in OCI | 0 | (1,000,000) | 6,000,000
Total recognized in net periodic benefit cost and OCI | $ 106,000,000 | $ 94,000,000 | $ 79,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 4.30% | 3.65% |
Interest crediting rate | 3.36% | 2.80% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 3.65% | 4.10% | 4.50%
Expected return on plan assets | 7.00% | 7.00% | 7.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate | 2.80% | 2.86% | 3.03%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] |  |  |
Expected employer contributions | $ 118,000,000 |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2019 | 207,000,000 |  |
2020 | 159,000,000 |  |
2021 | 154,000,000 |  |
2022 | 152,000,000 |  |
2023 | 149,000,000 |  |
2024-2028 | $ 698,000,000 |  |
Southern California Gas Company [Member] | Pension Plan [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% | 10.00%
Southern California Gas Company [Member] | Pension Plan [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% | 2.00%
Southern California Gas Company [Member] | Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Beginning balance | $ 737,000,000 | $ 691,000,000 |
Service cost | 15,000,000 | 14,000,000 | $ 14,000,000
Interest cost | 27,000,000 | 29,000,000 | 32,000,000
Contributions from plan participants | 14,000,000 | 13,000,000 |
Actuarial (gain) loss | (100,000,000) | 16,000,000 |
Benefit payments | (49,000,000) | (44,000,000) |
Special termination benefits | 2,000,000 | 18,000,000 | 11,000,000
Settlements | 0 | 0 |
Transfer of liability from other plans | 0 | 0 |
Ending balance | 646,000,000 | 737,000,000 | 691,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Actual return on plan assets | (43,000,000) | 151,000,000 |
Employer contributions | 1,000,000 | 3,000,000 |
Contributions from plan participants | 14,000,000 | 13,000,000 |
Benefit payments | (49,000,000) | (44,000,000) |
Settlements | 0 | 0 |
Transfer of assets from other plans | 0 | 0 |
Ending balance | 916,000,000 | 993,000,000 | 870,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded status | 270,000,000 | 256,000,000 |
Net recorded (liability) asset at December 31 | 270,000,000 | 256,000,000 |
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent assets | 270,000,000 | 256,000,000 |
Current liabilities | 0 | 0 |
Noncurrent liabilities | 0 | 0 |
Net recorded (liability) asset | 270,000,000 | 256,000,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |
Service cost | 15,000,000 | 14,000,000 | 14,000,000
Interest cost | 27,000,000 | 29,000,000 | 32,000,000
Expected return on assets | (56,000,000) | (53,000,000) | (56,000,000)
Amortization of Prior service cost (credit) | (3,000,000) | (3,000,000) | (4,000,000)
Amortization of actuarial loss (gain) | (2,000,000) | (3,000,000) | 0
Settlement charges | 0 | 0 | 0
Special termination benefits | 2,000,000 | 18,000,000 | 11,000,000
Net periodic benefit cost | (17,000,000) | 2,000,000 | (3,000,000)
Regulatory adjustment | 17,000,000 | 0 | 3,000,000
Total expense recognized | 0 | 2,000,000 | 0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] |  |  |
Net loss (gain) | 0 | 0 | 0
Prior service cost | 0 | 0 | 0
Amortization of prior service cost | 0 | 0 | 0
Total recognized in OCI | 0 | 0 | 0
Total recognized in net periodic benefit cost and OCI | $ 0 | $ 2,000,000 | $ 0
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 4.30% | 3.70% |
Interest crediting rate | 3.36% | 2.80% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 3.70% | 4.20% | 4.50%
Expected return on plan assets | 6.38% | 6.37% | 7.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate | 2.80% | 2.86% | 3.03%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] |  |  |
Expected employer contributions | $ 1,000,000 |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2019 | 36,000,000 |  |
2020 | 36,000,000 |  |
2021 | 37,000,000 |  |
2022 | 37,000,000 |  |
2023 | 38,000,000 |  |
2024-2028 | $ 187,000,000 |  |
Southern California Gas Company [Member] | Other Postretirement Benefits Plan [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% | 10.00%
Southern California Gas Company [Member] | Other Postretirement Benefits Plan [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% | 2.00%
San Diego Gas and Electric Company [Member] |  |  |
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent liabilities | $ (212,000,000) | $ (182,000,000) |
San Diego Gas and Electric Company [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Beginning balance | 971,000,000 | 935,000,000 |
Service cost | 30,000,000 | 29,000,000 | $ 29,000,000
Interest cost | 35,000,000 | 38,000,000 | 41,000,000
Contributions from plan participants | 0 | 0 |
Actuarial (gain) loss | (63,000,000) | 50,000,000 |
Plan amendments | 8,000,000 | 0 |
Benefit payments | (22,000,000) | (83,000,000) |
Special termination benefits | 0 | 0 |
Settlements | (145,000,000) | 0 | (75,000,000)
Transfer of liability from other plans | 0 | 2,000,000 |
Ending balance | 814,000,000 | 971,000,000 | 935,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Actual return on plan assets | (56,000,000) | 120,000,000 |
Employer contributions | 47,000,000 | 22,000,000 |
Contributions from plan participants | 0 | 0 |
Benefit payments | (22,000,000) | (83,000,000) |
Settlements | (145,000,000) | 0 |
Transfer of assets from other plans | 0 | 3,000,000 |
Ending balance | 600,000,000 | 776,000,000 | 714,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded status | (214,000,000) | (195,000,000) |
Net recorded (liability) asset at December 31 | (214,000,000) | (195,000,000) |
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent assets | 0 | 0 |
Current liabilities | (2,000,000) | (13,000,000) |
Noncurrent liabilities | (212,000,000) | (182,000,000) |
Net recorded (liability) asset | (214,000,000) | (195,000,000) |
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract] |  |  |
Net actuarial (loss) gain | (4,000,000) | (8,000,000) |
Prior service cost | (6,000,000) | 0 |
Total | (10,000,000) | (8,000,000) |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Projected benefit obligation | 788,000,000 | 939,000,000 |
Accumulated benefit obligation | 762,000,000 | 900,000,000 |
Fair value of plan assets | 600,000,000 | 776,000,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |
Service cost | 30,000,000 | 29,000,000 | 29,000,000
Interest cost | 35,000,000 | 38,000,000 | 41,000,000
Expected return on assets | (47,000,000) | (47,000,000) | (49,000,000)
Amortization of Prior service cost (credit) | 2,000,000 | 1,000,000 | 1,000,000
Amortization of actuarial loss (gain) | 1,000,000 | 9,000,000 | 10,000,000
Settlement charges | 26,000,000 | 0 | 16,000,000
Special termination benefits | 0 | 0 | 0
Net periodic benefit cost | 47,000,000 | 30,000,000 | 48,000,000
Regulatory adjustment | (8,000,000) | (8,000,000) | (45,000,000)
Total expense recognized | 39,000,000 | 22,000,000 | 3,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] |  |  |
Net loss (gain) | (1,000,000) | 2,000,000 | 1,000,000
Prior service cost | 8,000,000 | 0 | 0
Amortization of actuarial loss | (1,000,000) | (1,000,000) | (1,000,000)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax | (4,000,000) | 0 | 0
Total recognized in OCI | 2,000,000 | 1,000,000 | 0
Total recognized in net periodic benefit cost and OCI | $ 41,000,000 | $ 23,000,000 | $ 3,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 4.29% | 3.64% |
Interest crediting rate | 3.36% | 2.80% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 3.64% | 4.08% | 4.35%
Expected return on plan assets | 7.00% | 7.00% | 7.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate | 2.80% | 2.86% | 3.03%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] |  |  |
Expected employer contributions | $ 40,000,000 |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2019 | 109,000,000 |  |
2020 | 69,000,000 |  |
2021 | 64,000,000 |  |
2022 | 61,000,000 |  |
2023 | 62,000,000 |  |
2024-2028 | $ 282,000,000 |  |
San Diego Gas and Electric Company [Member] | Pension Plan [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% | 10.00%
San Diego Gas and Electric Company [Member] | Pension Plan [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% | 2.00%
San Diego Gas and Electric Company [Member] | Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Beginning balance | $ 185,000,000 | $ 190,000,000 |
Service cost | 5,000,000 | 5,000,000 | $ 5,000,000
Interest cost | 7,000,000 | 8,000,000 | 7,000,000
Contributions from plan participants | 8,000,000 | 7,000,000 |
Actuarial (gain) loss | (17,000,000) | (9,000,000) |
Plan amendments | 0 | 0 |
Benefit payments | (21,000,000) | (16,000,000) |
Special termination benefits | 3,000,000 | 0 | 14,000,000
Settlements | 0 | 0 |
Transfer of liability from other plans | 0 | 0 |
Ending balance | 170,000,000 | 185,000,000 | 190,000,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Actual return on plan assets | (12,000,000) | 30,000,000 |
Employer contributions | 2,000,000 | 5,000,000 |
Contributions from plan participants | 8,000,000 | 7,000,000 |
Benefit payments | (21,000,000) | (16,000,000) |
Settlements | 0 | 0 |
Transfer of assets from other plans | 0 | 0 |
Ending balance | 172,000,000 | 195,000,000 | 169,000,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded status | 2,000,000 | 10,000,000 |
Net recorded (liability) asset at December 31 | 2,000,000 | 10,000,000 |
Liability, Defined Benefit Plan [Abstract] |  |  |
Noncurrent assets | 2,000,000 | 10,000,000 |
Current liabilities | 0 | 0 |
Noncurrent liabilities | 0 | 0 |
Net recorded (liability) asset | 2,000,000 | 10,000,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |
Service cost | 5,000,000 | 5,000,000 | 5,000,000
Interest cost | 7,000,000 | 8,000,000 | 7,000,000
Expected return on assets | (13,000,000) | (11,000,000) | (12,000,000)
Amortization of Prior service cost (credit) | 3,000,000 | 3,000,000 | 3,000,000
Amortization of actuarial loss (gain) | (3,000,000) | 0 | (1,000,000)
Settlement charges | 0 | 0 | 0
Special termination benefits | 3,000,000 | 0 | 14,000,000
Net periodic benefit cost | 2,000,000 | 5,000,000 | 16,000,000
Regulatory adjustment | 0 | 0 | (14,000,000)
Total expense recognized | 2,000,000 | 5,000,000 | 2,000,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] |  |  |
Net loss (gain) | 0 | 0 | 0
Prior service cost | 0 | 0 | 0
Amortization of actuarial loss | 0 | 0 | 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax | 0 | 0 | 0
Total recognized in OCI | 0 | 0 | 0
Total recognized in net periodic benefit cost and OCI | $ 2,000,000 | $ 5,000,000 | $ 2,000,000
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 4.30% | 3.65% |
Interest crediting rate | 3.36% | 2.80% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 3.65% | 4.15% | 4.50%
Expected return on plan assets | 6.94% | 6.91% | 6.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Crediting Rate | 2.80% | 2.86% | 3.03%
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] |  |  |
Expected employer contributions | $ 0 |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2019 | 10,000,000 |  |
2020 | 10,000,000 |  |
2021 | 10,000,000 |  |
2022 | 11,000,000 |  |
2023 | 11,000,000 |  |
2024-2028 | $ 51,000,000 |  |
San Diego Gas and Electric Company [Member] | Other Postretirement Benefits Plan [Member] | Maximum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 10.00% | 10.00% | 10.00%
San Diego Gas and Electric Company [Member] | Other Postretirement Benefits Plan [Member] | Minimum [Member] |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Rate of compensation increase | 2.00% | 2.00% | 2.00%
Unfunded Plan [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Projected benefit obligation | $ 226,000,000 | $ 234,000,000 |
Accumulated benefit obligation | 201,000,000 | 215,000,000 |
Unfunded Plan [Member] | Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Accumulated benefit obligation | 26,000,000 | 9,000,000 |
Unfunded Plan [Member] | Southern California Gas Company [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Projected benefit obligation | 25,000,000 | 24,000,000 |
Accumulated benefit obligation | 21,000,000 | 21,000,000 |
Unfunded Plan [Member] | San Diego Gas and Electric Company [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Projected benefit obligation | 26,000,000 | 32,000,000 |
Accumulated benefit obligation | 19,000,000 | 30,000,000 |
Funded Plan [Member] | Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |
Accumulated benefit obligation | 30,000,000 | 32,000,000 |
Fair value of plan assets | $ 20,000,000 | $ 21,000,000 |

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