Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
Net Income from operations	$ 1,425	$ 1,368
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	942	581
Deferred income tax provision	21	42
Stock compensation cost	64	55
Change in:
Accounts receivable	(849)	1,140
Contract assets, current	215	417
Inventories and contracts in progress	697	631
Other current assets	165	12
Accounts payable and accrued liabilities	(588)	576
Contract liabilities, current	371	652
Global pension contributions	32	37
Canadian Government Settlement	(38)	(221)
Other operating activities, net	437	363
Net cash flows provided by operating activities of continuing operations	1,500	453
Investing Activities of Continuing Operations:
Capital expenditures	363	337
Investments in businesses	19	125
Dispositions of businesses	133	35
Increase in customer financing assets	173	241
Increase in collaboration intangible assets	87	78
Payments (receipts) from settlements of derivative contracts	(92)	221
Other investing activities, net	(23)	9
Net cash flows used in investing activities of continuing operations	(394)	(976)
Financing Activities of Continuing Operations:
Proceeds from Issuance of Long-term Debt	32	18
Repayments of Long-term Debt	26	993
(Decrease) increase in short-term borrowings, net	(349)	666
Proceeds from Common Stock issued under employee stock plans	5	5
Dividends paid on Common Stock	609	535
Repurchase of Common Stock	29	25
Other financing activities, net	(101)	(46)
Net cash flows used in financing activities of continuing operations	(1,077)	(910)
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents	41	119
Net increase (decrease) in cash and cash equivalents	70	(1,314)
Cash and Cash Equivalents, beginning of year	6,212	9,018
Cash and Cash Equivalents, end of period	6,282	7,704
Restricted Cash	42	37
Cash and cash equivalents, end of period	$ 6,240	$ 7,667