CONTRACT AND OTHER DEFERRED ASSETS & CONTRACT LIABILITIES AND DEFERRED INCOME - Schedule of Contract Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	$ 9,485	$ 8,621
Non-current contract and other deferred assets	486	555
Total contract and other deferred assets	9,971	9,176
Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	5,535	5,321
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	3,950	3,300
Power
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	7,247	6,944
Non-current contract and other deferred assets	474	536
Total contract and other deferred assets	7,720	7,479
Power \| Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	5,535	5,321
Power \| Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	1,712	1,622
Wind
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	842	538
Non-current contract and other deferred assets	2	8
Total contract and other deferred assets	844	546
Wind \| Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	0	0
Wind \| Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	842	538
Electrification
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	1,396	1,139
Non-current contract and other deferred assets	11	11
Total contract and other deferred assets	1,406	1,150
Electrification \| Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	0	0
Electrification \| Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current contract assets	$ 1,396	$ 1,139