v3.26.1
GENERAL INFORMATION AND OTHER FINANCIAL DATA - PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 34 $ 32
Interest cost 45 45
Expected return on assets (45) (45)
Amortization of:    
Prior service cost (credit) 1 1
Actuarial loss (gain) 1 3
Settlement charges 0 4
Special termination benefits 0 0
Net periodic benefit cost (credit) 36 40
Regulatory adjustments (28) (28)
Total expense recognized 8 12
Pension | SDG&E    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 10 9
Interest cost 12 12
Expected return on assets (13) (12)
Amortization of:    
Actuarial loss (gain) 1 2
Special termination benefits 0 0
Net periodic benefit cost (credit) 10 11
Regulatory adjustments (10) (10)
Total expense recognized 0 1
Pension | SoCalGas    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 19 19
Interest cost 28 28
Expected return on assets (30) (30)
Amortization of:    
Prior service cost (credit) 1 1
Actuarial loss (gain) 0 1
Settlement charges 0 4
Special termination benefits 0 0
Net periodic benefit cost (credit) 18 23
Regulatory adjustments (18) (18)
Total expense recognized 0 5
PBOP    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 3 3
Interest cost 11 10
Expected return on assets (18) (16)
Amortization of:    
Prior service cost (credit) (1) (1)
Actuarial loss (gain) (3) (3)
Settlement charges 0 0
Special termination benefits 18 0
Net periodic benefit cost (credit) 10 (7)
Regulatory adjustments (10) 7
Total expense recognized 0 0
PBOP | SDG&E    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 1 1
Interest cost 2 2
Expected return on assets (3) (2)
Amortization of:    
Actuarial loss (gain) 0 (1)
Special termination benefits 6 0
Net periodic benefit cost (credit) 6 0
Regulatory adjustments (6) 0
Total expense recognized 0 0
PBOP | SoCalGas    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 2 3
Interest cost 8 7
Expected return on assets (15) (14)
Amortization of:    
Prior service cost (credit) (1) (1)
Actuarial loss (gain) (2) (2)
Settlement charges 0 0
Special termination benefits 12 0
Net periodic benefit cost (credit) 4 (7)
Regulatory adjustments (4) 7
Total expense recognized $ 0 $ 0