RETIREMENT BENEFITS - Contributions (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
U.S. Pension Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Company contributions for the nine months ended September 30,	$ 500	$ 541	$ 33
Company contributions made or expected to be made during the remainder of the year		12	19
Non-U.S. Pension Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Company contributions for the nine months ended September 30,		48	85
Company contributions made or expected to be made during the remainder of the year		29	49
U.S. Postretirement Benefit Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Company contributions for the nine months ended September 30,		4	217
Company contributions made or expected to be made during the remainder of the year		0	18
Non-U.S. Postretirement Benefit Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Company contributions for the nine months ended September 30,		4	7
Company contributions made or expected to be made during the remainder of the year		$ 3	$ 2