CONTRACT AND OTHER DEFERRED ASSETS & CONTRACT LIABILITIES AND DEFERRED INCOME - Schedule of Contract Liabilities and Deferred Income (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Capitalized Contract Cost [Line Items]
Current deferred income	$ 293	$ 361
Contract liabilities and current deferred income	16,908	15,074
Non-current deferred income	199	173
Total contract liabilities and deferred income	17,107	15,247
Services
Capitalized Contract Cost [Line Items]
Service agreement liabilities	1,914	1,810
Equipment
Capitalized Contract Cost [Line Items]
Service agreement liabilities	14,700	12,903
Power
Capitalized Contract Cost [Line Items]
Current deferred income	3	20
Contract liabilities and current deferred income	9,051	7,562
Non-current deferred income	35	48
Total contract liabilities and deferred income	9,085	7,610
Power | Services
Capitalized Contract Cost [Line Items]
Service agreement liabilities	1,914	1,810
Power | Equipment
Capitalized Contract Cost [Line Items]
Service agreement liabilities	7,134	5,732
Wind
Capitalized Contract Cost [Line Items]
Current deferred income	201	228
Contract liabilities and current deferred income	4,268	5,047
Non-current deferred income	144	90
Total contract liabilities and deferred income	4,412	5,137
Wind | Services
Capitalized Contract Cost [Line Items]
Service agreement liabilities	0	0
Wind | Equipment
Capitalized Contract Cost [Line Items]
Service agreement liabilities	4,067	4,819
Electrification
Capitalized Contract Cost [Line Items]
Current deferred income	89	113
Contract liabilities and current deferred income	3,589	2,465
Non-current deferred income	21	35
Total contract liabilities and deferred income	3,610	2,500
Electrification | Services
Capitalized Contract Cost [Line Items]
Service agreement liabilities	0	0
Electrification | Equipment
Capitalized Contract Cost [Line Items]
Service agreement liabilities	$ 3,500	$ 2,352