Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement of Cash Flows [Abstract]
Net Income from operations	$ 3,424	$ 3,507
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,864	1,173
Deferred income tax provision	6	45
Stock compensation cost	156	117
Gain on sale of Taylor Company	0	795
Change in:
Accounts receivable	(769)	1,661
Contract assets, current	491	617
Inventories and contracts in progress	1,108	962
Other current assets	(51)	(301)
Accounts payable and accrued liabilities	(58)	2,010
Contract liabilities, current	381	440
Global pension contributions	79	59
Canadian Government Settlement	(38)	(221)
Other operating activities, net	1,266	723
Net cash flows provided by operating activities of continuing operations	3,611	2,555
Investing Activities of Continuing Operations:
Capital expenditures	830	709
Investments in businesses	32	134
Dispositions of businesses	133	1,094
Increase in customer financing assets	331	344
Increase in collaboration intangible assets	169	181
Payments (receipts) from settlements of derivative contracts	(61)	(82)
Other investing activities, net	49	46
Net cash flows used in investing activities of continuing operations	(1,217)	(238)
Financing Activities of Continuing Operations:
Proceeds from Issuance of Long-term Debt	56	2,429
Repayments of Long-term Debt	65	2,092
(Decrease) increase in short-term borrowings, net	(327)	642
Proceeds from Common Stock issued under employee stock plans	11	6
Dividends paid on Common Stock	1,219	1,070
Repurchase of Common Stock	69	52
Other financing activities, net	(153)	(74)
Net cash flows used in financing activities of continuing operations	(1,766)	(211)
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents	16	(18)
Net increase (decrease) in cash and cash equivalents	644	2,088
Cash and Cash Equivalents, beginning of year	6,212	9,018
Cash and Cash Equivalents, end of period	6,856	11,106
Restricted Cash	37	38
Cash and cash equivalents, end of period	$ 6,819	$ 11,068