Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Cash Flows [Abstract]
Net Income from operations	$ 4,681	$ 4,856
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	2,831	1,766
Deferred income tax provision	(19)	70
Stock compensation cost	261	181
Portfolio separation tax cost	618	0
Gain on sale of Taylor Company	0	799
Change in:
Accounts receivable	(59)	2,379
Contract assets, current	499	892
Inventories and contracts in progress	1,503	991
Other current assets	111	(262)
Accounts payable and accrued liabilities	1,089	3,044
Contract liabilities, current	394	313
Global pension contributions	89	72
Canadian Government Settlement	(38)	(221)
Other operating activities, net	1,573	821
Net cash flows provided by operating activities of continuing operations	6,101	4,317
Investing Activities of Continuing Operations:
Capital expenditures	1,359	1,122
Investments in businesses	39	177
Dispositions of businesses	134	1,099
Increase in customer financing assets	444	453
Increase in collaboration intangible assets	259	302
Payments (receipts) from settlements of derivative contracts	(158)	(71)
Other investing activities, net	164	135
Net cash flows used in investing activities of continuing operations	(1,973)	(1,019)
Financing Activities of Continuing Operations:
Proceeds from Issuance of Long-term Debt	73	13,409
Repayments of Long-term Debt	711	2,093
(Decrease) increase in short-term borrowings, net	(104)	1,228
Proceeds from Common Stock issued under employee stock plans	14	33
Dividends paid on Common Stock	1,830	1,606
Repurchase of Common Stock	111	72
Other financing activities, net	(225)	(60)
Net cash flows used in financing activities of continuing operations	(2,894)	10,839
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents	(65)	(111)
Net increase in cash, cash equivalents and restricted cash	1,169	14,026
Cash and Cash Equivalents, beginning of year	6,212	9,018
Cash and Cash Equivalents, end of period	7,381	23,044
Restricted Cash	40	9,245
Cash and cash equivalents, end of period	$ 7,341	$ 13,799