CONTRACT & OTHER DEFERRED ASSETS AND PROGRESS COLLECTIONS & DEFERRED INCOME - Progress Collections and Deferred Income (Details) - USD ($) $ in Millions		Mar. 31, 2018	Dec. 31, 2017
Capitalized Contract Cost [Line Items]
Total progress collections & deferred income		$ 21,950	$ 22,117
GE
Capitalized Contract Cost [Line Items]
Progress collections		18,290	18,310
Deferred income		3,917	3,911
Total progress collections & deferred income	[1]	$ 22,207	$ 22,221

[1] Represents the adding together of all affiliated companies except GE Capital, which is presented on a one-line basis. See Note 1.