Property, Plant and Equipment (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment
Original cost	$ 84,140	$ 85,875
Accumulated depreciation and amortization	(35,124)	(35,356)
Depreciation and amortization	1,193	1,210
Property, plant and equipment - net	49,016	50,518
GE Capital
Property, Plant and Equipment
Property, plant and equipment - net	$ 30,962	$ 32,225