RETIREMENT BENEFITS - Contributions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
U.S. Pension Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Total Company contributions	$ 11	$ 11
Estimated total company contributions	35	32
Non - U.S. Pension Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Total Company contributions	26	43
Estimated total company contributions	129	127
U.S. Postretirement Benefit Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Total Company contributions	20	10
Estimated total company contributions	47	47
Non-U.S. Postretirement Benefit Plans
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Total Company contributions	7	3
Estimated total company contributions	$ 2	$ 7