Consolidated Statement of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities:
Net income (loss) from continuing operations		$ 4,145	$ (2,928)	$ 3,731
Adjustments to reconcile net income (loss) from continuing operations to net cash flows provided by operating activities:
Depreciation and amortization		4,557	4,156	2,708
Deferred income tax (benefit) provision		(88)	(99)	38
Stock compensation cost		442	330	268
Net periodic pension and other postretirement income		(1,414)	(413)	(566)
Debt extinguishment costs		649	0	0
Goodwill impairment charge		0	3,183	0
Change in:
Accounts receivables		(570)	1,318	88
Contract assets		(1,594)	63	(679)
Inventory		163	412	(1,267)
Other current assets		(566)	(445)	(984)
Accounts payable and accrued liabilities		917	(1,666)	1,111
Contract liabilities		1,372	1,129	1,234
Global pension contributions		(59)	(1,025)	(55)
Other operating activities, net		(812)	319	194
Net cash flows provided by operating activities from continuing operations		7,142	4,334	5,821
Investing Activities:
Capital expenditures		(2,134)	(1,795)	(1,868)
Payments on customer financing assets		(231)	(280)	(787)
Receipts from customer financing assets		389	368	128
Investments in businesses (Note 2)		(1,088)	(419)	(9)
Cash acquired in Raytheon Merger		0	3,208	0
Dispositions of businesses, net of cash transferred (Note 2)		1,879	2,556	134
Increase in collaboration intangible assets		(188)	(172)	(351)
(Payments) receipts from settlements of derivative contracts, net		(16)	(32)	342
Other investing activities, net		25	(91)	(265)
Net cash flows (used in) provided by investing activities from continuing operations		(1,364)	3,343	(2,676)
Financing Activities:
Issuance of long-term debt		4,062	2,004	(19)
Distribution from discontinued operations		0	17,207	0
Repayment of long-term debt		(4,254)	(16,082)	(2,693)
Debt extinguishment costs		(649)	0	0
(Decrease) increase in short-term borrowings, net		(113)	(2,041)	896
Proceeds from Common Stock issued under employee stock plans		7	15	27
Dividends paid on Common Stock		(2,957)	(2,732)	(2,442)
Repurchase of Common Stock		(2,327)	(47)	(151)
Net transfer (to) from discontinued operations		(71)	(2,033)	2,387
Other financing activities, net		(454)	(151)	82
Net cash flows (used in) financing activities of continuing operations		(6,756)	(3,860)	(1,913)
Discontinued Operations:
Net cash (used in) provided by operating activities		(71)	(728)	3,062
Net cash used in investing activities		0	(241)	(416)
Net cash provided by (used in) financing activities		71	(1,414)	(2,651)
Net cash used in discontinued operations		0	(2,383)	(5)
Effect of foreign exchange rate changes on cash and cash equivalents from continuing operations		(1)	54	1
Effect of foreign exchange rate changes on cash and cash equivalents from discontinued operations		0	(76)	(20)
Net (decrease) increase in cash, cash equivalents and restricted cash		(979)	1,412	1,208
Cash, cash equivalents and restricted cash, beginning of year		8,832	4,961	3,731
Cash, cash equivalents and restricted cash within assets related to discontinued operations, beginning of year		0	2,459	2,481
Cash, cash equivalents and restricted cash, end of year		7,853	8,832	7,420
Less: Restricted cash, included in Other assets		21	30	24
Less: Cash, cash equivalents and restricted cash for discontinued operations		0	0	2,459
Cash and cash equivalents, end of year		7,832	8,802	4,937
Supplemental Disclosure of Cash Flow Information:
Interest paid, net of amounts capitalized	[1]	1,339	1,628	1,801
Income taxes paid, net of refunds	[1]	$ 1,124	$ 1,716	$ 1,768

[1] (1)    Amounts are inclusive of continuing operations and discontinued operations payments.