RETIREMENT BENEFITS - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Change in accumulated other comprehensive income (loss)
Beginning-of-period balance, net of tax		$ (5,249)		$ (5,159)
Actuarial assumptions changes and plan experience		1,293		877
Net asset gain (loss) due to difference between actual and expected returns		(535)		(370)
Net amortizations		61		125
Prior service credit		0		(6)
Foreign exchange impact and other		(9)		63
Change in deferred taxes, net		(232)	$ 95	(201)	$ 117
Change, net of tax	[1]	578	$ (144)	488	$ (177)
End-of-period balance, net of tax		$ (4,671)		$ (4,671)

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