RETIREMENT BENEFITS - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Change in accumulated other comprehensive income (loss)
Beginning-of-period balance, net of tax		$ (4,671)		$ (5,159)
Actuarial assumptions changes and plan experience		(26)		851
Net asset gain (loss) due to difference between actual and expected returns		(681)		(1,051)
Net amortizations		54		179
Prior service credit		0		(6)
Foreign exchange impact and other		108		171
Change in deferred taxes, net		185	$ (36)	(16)	$ 81
Change, net of tax	[1]	(360)	$ 71	128	$ (106)
End-of-period balance, net of tax		$ (5,031)		$ (5,031)

[1] Reflects adjustments based on the actuarial valuations of the Company’s significant pension and postretirement plans, including changes in the mortality assumptions at September 30, 2015, and amortization of amounts previously recognized in Accumulated other comprehensive income (loss). See Note 8 to the Consolidated Financial Statements.