v3.26.3
COMPREHENSIVE INCOME (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance $ 33,289 $ 32,978 $ 32,218 $ 30,968 $ 27,364 $ 26,986 $ 32,218 $ 26,986
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) 6 23 (14) (16) (33) 24 15 (25)
Ending balance 34,043 33,289 32,978 31,479 30,968 27,364 34,043 31,479
Total                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance 45 22 36 (12) 21 (3) 36 (3)
Change in Fair Value Recognized in AOCI, Net of Tax 21     (17)     66 (16)
Amount of (Gain) Loss Reclassified from AOCI (19)     2     (64) (11)
Income Tax (Expense) Benefit (4)     1     (13) (2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit (15)     1     (51) (9)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) 6 23 (14) (16) (33) 24 15 (25)
Ending balance 51 45 22 (28) (12) 21 51 (28)
Pension and OPEB Amortization of Deferred Costs                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance (39)   (41) (104)   (105) (41) (105)
Change in Fair Value Recognized in AOCI, Net of Tax 0     0     0 0
Amount of (Gain) Loss Reclassified from AOCI 1     0     4 1
Income Tax (Expense) Benefit 0     0     1 0
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit 1     0     3 1
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) 1     0     3 1
Ending balance (38) (39)   (104) (104)   (38) (104)
Amortization of Actuarial (Gains) Losses                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Amount of (Gain) Loss Reclassified from AOCI 1           4 1
Commodity | Cash Flow Hedges                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance 85   78 92   99 78 99
Change in Fair Value Recognized in AOCI, Net of Tax 16     (17)     61 (15)
Amount of (Gain) Loss Reclassified from AOCI (20)     3     (68) (9)
Income Tax (Expense) Benefit (4)     1     (14) (2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit (16)     2     (54) (7)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) 0     (15)     7 (22)
Ending balance 85 85   77 92   85 77
Interest Rate | Cash Flow Hedges                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance (1)   $ (1) 0   $ 3 (1) 3
Change in Fair Value Recognized in AOCI, Net of Tax 5     0     5 (1)
Amount of (Gain) Loss Reclassified from AOCI 0     (1)     0 (3)
Income Tax (Expense) Benefit 0     0     0 0
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit 0     (1)     0 (3)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) 5     (1)     5 (4)
Ending balance $ 4 $ (1)   $ (1) $ 0   $ 4 $ (1)