BORROWINGS (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total short-term borrowings	$ 1,032	$ 1,253
Long-term borrowings and lease obligation	19,493	19,711
Total borrowings	20,525	20,965
Senior notes
Debt Instrument [Line Items]
Long-term borrowings	17,351	17,509
Subordinated notes and other
Debt Instrument [Line Items]
Long-term borrowings	1,370	1,383
Other
Debt Instrument [Line Items]
Long-term borrowings and lease obligation	772	819
Senior notes
Debt Instrument [Line Items]
Current portion of long-term borrowings	879	1,044
Subordinated notes and other
Debt Instrument [Line Items]
Current portion of long-term borrowings	81	107
Other short term borrowings
Debt Instrument [Line Items]
Other short term borrowings	$ 72	$ 103