SEGMENT INFORMATION - Assets By Segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Segment Reporting [Line Items]
Total assets	$ 80,800		$ 80,800		$ 63,016
Property, plant, and equipment additions	377	$ 167	1,706	$ 353
Depreciation and amortization	418	205	760	410
Operating segments \| Power
Segment Reporting [Line Items]
Total assets	28,505		28,505		26,847
Property, plant, and equipment additions	189	69	357	153
Depreciation and amortization	120	115	236	231
Operating segments \| Electrification
Segment Reporting [Line Items]
Total assets	21,000		21,000		9,017
Property, plant, and equipment additions	97	33	1,134	69
Depreciation and amortization	230	23	380	43
Operating segments \| Electrification \| Prolec GE
Segment Reporting [Line Items]
Property, plant, and equipment additions			942
Operating segments \| Wind
Segment Reporting [Line Items]
Total assets	12,416		12,416		11,444
Property, plant, and equipment additions	57	45	151	95
Depreciation and amortization	55	51	114	105
Other
Segment Reporting [Line Items]
Total assets	18,880		18,880		$ 15,709
Property, plant, and equipment additions	35	20	63	35
Depreciation and amortization	$ 14	$ 16	$ 30	$ 31