Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 8,579	$ 8,802
Accounts receivable, net	10,037	9,254
Contract assets	10,238	9,931
Inventory, net	9,498	9,411
Other assets, current	4,200	5,978
Total Current Assets	42,552	43,376
Customer financing assets	3,079	3,144
Fixed assets	26,554	26,346
Accumulated depreciation	(11,812)	(11,384)
Fixed assets, net	14,742	14,962
Operating lease right-of-use assets	1,913	1,880
Goodwill	54,265	54,285
Intangible assets, net	39,999	40,539
Other assets	4,058	3,967
Total Assets	160,608	162,153
Short-term borrowings	234	247
Accounts payable	9,182	8,639
Accrued employee compensation	2,511	3,006
Other accrued liabilities	10,184	10,517
Contract liabilities	12,879	12,889
Long-term debt currently due	1,369	550
Total Current Liabilities	36,359	35,848
Long-term debt	29,935	31,026
Operating lease liabilities, non-current	1,552	1,516
Future pension and postretirement benefit obligations	9,808	10,342
Other long-term liabilities	9,612	9,537
Total Liabilities	87,266	88,269
Commitments and contingencies (Note 17)
Redeemable noncontrolling interest	34	32
Common Stock	36,997	36,930
Treasury Stock	(10,780)	(10,407)
Retained earnings	49,460	49,423
Unearned ESOP Shares	(46)	(49)
Accumulated other comprehensive loss	(3,921)	(3,734)
Total Shareowners' Equity	71,710	72,163
Noncontrolling interest	1,598	1,689
Total Equity	73,308	73,852
Total Liabilities, Redeemable Noncontrolling Interest and Equity	$ 160,608	$ 162,153