v3.26.3
GENERAL INFORMATION AND OTHER FINANCIAL DATA - PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Pension        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 33 $ 32 $ 100 $ 96
Interest cost 46 42 135 132
Expected return on assets (42) (41) (132) (130)
Amortization of:        
Prior service cost (credit) 0 1 2 3
Actuarial loss (gain) 3 3 7 9
Settlement charges 0 12 0 16
Special termination benefits     0 0
Net periodic benefit cost (credit) 40 49 112 126
Regulatory adjustments (20) 26 (64) 25
Total expense recognized 20 75 48 151
Pension | San Diego Gas and Electric Company        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 10 10 31 29
Interest cost 12 11 36 35
Expected return on assets (12) (11) (38) (35)
Amortization of:        
Actuarial loss (gain) 1 1 2 3
Special termination benefits     0 0
Net periodic benefit cost (credit) 11 11 31 32
Regulatory adjustments 2 2 (6) (6)
Total expense recognized 13 13 25 26
Pension | Southern California Gas Company        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 18 19 57 57
Interest cost 29 28 85 84
Expected return on assets (27) (30) (85) (89)
Amortization of:        
Prior service cost (credit) 1 1 2 3
Actuarial loss (gain) 1 1 1 2
Settlement charges 0 6 0 10
Special termination benefits     0 0
Net periodic benefit cost (credit) 22 25 60 67
Regulatory adjustments (22) 24 (58) 31
Total expense recognized 0 49 2 98
PBOP        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 3 3 10 10
Interest cost 10 10 32 29
Expected return on assets (17) (17) (54) (50)
Amortization of:        
Prior service cost (credit) (1) (1) (2) (2)
Actuarial loss (gain) (4) (3) (9) (9)
Settlement charges 0 0 0 0
Special termination benefits     19 40
Net periodic benefit cost (credit) (9) (8) (4) 18
Regulatory adjustments 9 8 4 (15)
Total expense recognized 0 0 0 3
PBOP | San Diego Gas and Electric Company        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 1 0 2 1
Interest cost 3 2 7 6
Expected return on assets (4) (2) (8) (6)
Amortization of:        
Actuarial loss (gain) 0 0 (1) (1)
Special termination benefits     8 17
Net periodic benefit cost (credit) 0 0 8 17
Regulatory adjustments 0 0 (8) (14)
Total expense recognized 0 0 0 3
PBOP | Southern California Gas Company        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 2 2 7 7
Interest cost 7 7 24 22
Expected return on assets (14) (13) (45) (42)
Amortization of:        
Prior service cost (credit) (1) (1) (2) (2)
Actuarial loss (gain) (3) (3) (7) (7)
Settlement charges 0 0 0 0
Special termination benefits     11 23
Net periodic benefit cost (credit) (9) (8) (12) 1
Regulatory adjustments 9 8 12 (1)
Total expense recognized $ 0 $ 0 $ 0 $ 0