Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 7,667	$ 8,985
Accounts receivable, net	11,699	12,595
Contract with Customer, Asset, Net, Current	2,989	0
Inventories and contracts in progress, net	8,938	9,881
Other assets, current	1,448	1,397
Total Current Assets	32,741	32,858
Customer financing assets	2,522	2,372
Future income tax benefits	1,763	1,723
Fixed assets	21,820	21,364
Less: Accumulated depreciation	11,537	11,178
Fixed assets, net	10,283	10,186
Goodwill	28,339	27,910
Intangible assets, net	15,995	15,883
Other assets	7,136	5,988
Total Assets	98,779	96,920
Short-term borrowings	1,066	392
Accounts payable	8,875	9,579
Accrued liabilities	7,951	12,316
Contract with Customer, Liability, Current	5,727	0
Long-term debt currently due	1,128	2,104
Total Current Liabilities	24,747	24,391
Long-term debt	25,153	24,989
Future pension and postretirement benefit obligations	2,847	3,036
Other long-term liabilities	13,405	12,952
Total Liabilities	66,152	65,368
Commitments and contingent liabilities (Note 15)
Redeemable noncontrolling interest	135	131
Common Stock	17,641	17,574
Treasury Stock	35,619	35,596
Retained earnings	55,533	55,242
Unearned ESOP shares	84	85
Accumulated other comprehensive loss	(6,937)	(7,525)
Total Shareowners' Equity	30,534	29,610
Noncontrolling interest	1,958	1,811
Total Equity	32,492	31,421
Total Liabilities and Equity	$ 98,779	$ 96,920