BORROWINGS (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total short-term borrowings	$ 1,700	$ 1,108
Long-term borrowings and lease obligation	17,973	19,417
Total borrowings	19,673	20,525
Senior notes
Debt Instrument [Line Items]
Long-term borrowings	16,155	17,509
Subordinated notes and other
Debt Instrument [Line Items]
Long-term borrowings	1,359	1,383
Other
Debt Instrument [Line Items]
Long-term borrowings and lease obligation	458	525
Senior notes
Debt Instrument [Line Items]
Current portion of long-term borrowings	1,630	1,044
Subordinated notes and other
Debt Instrument [Line Items]
Current portion of long-term borrowings	71	27
Other short-term borrowings
Debt Instrument [Line Items]
Other short-term borrowings	$ 0	$ 37