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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI) AND COMMON STOCK - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance $ 9,947 $ 10,049 $ 10,593 $ 8,380
AOCI before reclass, net of taxes 75 69 516 111
Reclass from AOCI, net of taxes (68) (68) (192) (298)
Less: AOCI attributable to noncontrolling interests 7 0 324 (395)
Transfer or allocation of benefit plans – net of taxes   0   (207)
Ending balance 9,729 10,517 9,729 10,517
Total AOCI        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance (1,445) (1,031) (1,759) (635)
Ending balance (1,438) (1,031) (1,438) (1,031)
Currency translation adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance (1,296) (1,441) (1,734) (1,335)
Ending balance (1,266) (1,342) (1,266) (1,342)
Currency translation adjustments, including noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
AOCI before reclass, net of taxes 31 99 471 105
Reclass from AOCI, net of taxes 0 0 0 (111)
Transfer or allocation of benefit plans – net of taxes   0   0
Transfer or allocation of benefit plans, tax   0   0
Other comprehensive income (loss) before reclass, tax 5 0 3 33
Reclass from AOCI, taxes 0 0 0 0
Spin-Off related adjustments       39
Currency translation adjustments, including noncontrolling interests | Steam business nuclear activities disposal        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Reclass from AOCI, net of taxes     (111)  
Currency translation adjustments attributable to noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Less: AOCI attributable to noncontrolling interests 0 0 3 0
Benefit plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance (217) 333 (58) 674
Ending balance (268) 254 (268) 254
Benefit plans including noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
AOCI before reclass, net of taxes 21 (12) 6 (4)
Reclass from AOCI, net of taxes (72) (66) (214) (207)
Transfer or allocation of benefit plans – net of taxes   0   (207)
Transfer or allocation of benefit plans, tax   0   (207)
Other comprehensive income (loss) before reclass, tax (3) 4 9 14
Reclass from AOCI, taxes (1) 0 (3) (2)
Benefit plans attributable to noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Less: AOCI attributable to noncontrolling interests 0 0 1 1
Cash flow hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance 68 77 33 26
Ending balance 95 57 95 57
Cash flow hedges, including noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
AOCI before reclass, net of taxes 23 (18) 39 10
Reclass from AOCI, net of taxes 4 (2) 22 20
Transfer or allocation of benefit plans – net of taxes   0   0
Transfer or allocation of benefit plans, tax   0   0
Other comprehensive income (loss) before reclass, tax 0 0 0 0
Reclass from AOCI, taxes 0 0 0 0
Cash flow hedges, attributable to noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Less: AOCI attributable to noncontrolling interests 0 0 0 0
Equity attributable to noncontrolling interests        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning balance 1,070 982 1,047 964
Less: AOCI attributable to noncontrolling interests 0 0 4 2
Ending balance $ 1,083 $ 1,014 $ 1,083 $ 1,014