COMMITMENTS, GUARANTEES, PRODUCT WARRANTIES AND OTHER LOSS CONTINGENCIES - GUARANTEES (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Guarantor Obligations [Line Items]
Liability for indemnification agreements	$ 21,607	$ 22,912
Credit support
Guarantor Obligations [Line Items]
Commitments	2,282
Liability for credit support and indemnification agreements	44
Indemnification agreements
Guarantor Obligations [Line Items]
Commitments	1,051
Liability for credit support and indemnification agreements	7
Required funding under residual value guarantees	210
Liability for indemnification agreements	234
Indemnification agreements - discontinued operations
Guarantor Obligations [Line Items]
Commitments	2,611
Liability for indemnification agreements	$ 305