Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Statement of Cash Flows [Abstract]
Net income (loss) from continuing operations	$ (3,328)	$ 1,989
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,839	1,330
Deferred income tax provision	118	10
Stock compensation cost	135	118
Goodwill impairment loss	(223)	(244)
Goodwill, Impairment Loss	3,183	0
Change in:
Accounts receivable	1,163	736
Contract assets	376	(573)
Inventory	(550)	(795)
Other current assets	(180)	(322)
Accounts payable and accrued liabilities	(1,395)	(218)
Contract liabilities	201	633
Global pension contributions	(42)	(37)
Canadian Government Settlement	0	(38)
Other operating activities, net	45	180
Net cash flows provided by operating activities from continuing operations	1,342	2,769
Investing Activities of Continuing Operations:
Capital expenditures	(783)	(678)
Dispositions of businesses (Note 2)	234	133
Cash acquired in Raytheon Merger	3,208	0
Increase in customer financing assets, net	(129)	(332)
Increase in collaboration intangible assets	(106)	(169)
(Payments) receipts from settlements of derivative contracts	286	(61)
Other investing activities, net	(82)	(118)
Net cash flows provided by (used in) investing activities from continuing operations	2,056	(1,103)
Financing Activities:
Issuance of long-term debt	1,984	2
Dividend from discontinued operations	17,207	0
Repayment of long-term debt	(15,038)	(13)
Decrease in short-term borrowings, net	(2,045)	(388)
Proceeds from Common Stock issued under employee stock plans	10	11
Dividends paid on Common Stock	(1,338)	(1,219)
Repurchase of Common Stock	47	69
Net transfers (to) from discontinued operations	(1,966)	682
Other financing activities, net	(99)	(73)
Net cash flows used in financing activities from continuing operations	(1,332)	(1,067)
Discontinued Operations:
Net cash provided by (used in) operating activities	(661)	841
Net cash used in investing activities	(241)	(114)
Net cash used in financing activities	(1,481)	(698)
Net cash flows (used in) provided by discontinued operations	(2,383)	29
Effect of foreign exchange rate changes on cash and cash equivalents	(10)	4
Effect of foreign exchange rate changes on cash and cash equivalents from discontinued operations	(76)	11
Net (decrease) increase in cash, cash equivalents and restricted cash	(403)	643
Cash, cash equivalents and restricted cash, beginning of period	4,961	3,731
Cash, cash equivalents and restricted cash within assets related to discontinued operations, beginning of period	2,459	2,481
Cash, cash equivalents and restricted cash, end of period	7,017	6,855
Less: Restricted cash	42	18
Less: Cash, cash equivalents and restricted cash for discontinued operations	0	2,521
Cash and cash equivalents, end of period	$ 6,975	$ 4,316