Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 13,799	$ 8,985
Accounts receivable, net	12,550	12,595
Contract with Customer, Asset, Net, Current	3,450	0
Inventories and contracts in progress, net	9,068	9,881
Other assets, current	1,337	1,397
Total Current Assets	40,204	32,858
Customer financing assets	3,143	2,372
Future income tax benefits	1,701	1,723
Fixed assets	21,956	21,364
Less: Accumulated depreciation	11,720	11,178
Fixed assets, net	10,236	10,186
Goodwill	27,679	27,910
Intangible assets, net	15,701	15,883
Restricted Cash, Noncurrent	9,205	5
Other assets	7,070	5,983
Total Assets	114,939	96,920
Short-term borrowings	1,576	392
Accounts payable	10,509	9,579
Accrued liabilities	8,867	12,316
Contract with Customer, Liability, Current	5,460	0
Long-term debt currently due	92	2,104
Total Current Liabilities	26,504	24,391
Long-term debt	38,275	24,989
Future pension and postretirement benefit obligations	2,412	3,036
Other long-term liabilities	13,373	12,952
Total Liabilities	80,564	65,368
Commitments and contingent liabilities (Note 15)
Redeemable noncontrolling interest	125	131
Common Stock	17,869	17,574
Treasury Stock	35,667	35,596
Retained earnings	57,706	55,242
Unearned ESOP shares	79	85
Accumulated other comprehensive loss	(7,723)	(7,525)
Total Shareowners' Equity	32,106	29,610
Noncontrolling interest	2,144	1,811
Total Equity	34,250	31,421
Total Liabilities and Equity	$ 114,939	$ 96,920