Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Cash Flows [Abstract]
Net Income from operations	$ 3,507	$ 3,000
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,173	1,039
Deferred income tax provision	45	502
Stock compensation cost	117	96
Gain on sale of Taylor Company	795	0
Change in:
Accounts receivable	1,661	951
Contract assets, current	617	0
Inventories and contracts in progress	962	1,066
Other current assets	(301)	(27)
Accounts payable and accrued liabilities	2,010	1,436
Contract liabilities, current	440	0
Global pension contributions	59	79
Canadian Government Settlement	(221)	(246)
Other operating activities, net	723	619
Net cash flows provided by operating activities of continuing operations	2,555	3,139
Investing Activities of Continuing Operations:
Capital expenditures	709	771
Investments in businesses	134	168
Dispositions of businesses	1,094	19
Proceeds from the sale of the investment in Watsco Inc.	0	596
Increase in customer financing assets	344	240
Increase in collaboration intangible assets	181	195
Payments (receipts) from settlements of derivative contracts	(82)	294
Other investing activities, net	46	(63)
Net cash flows used in investing activities of continuing operations	(238)	(990)
Financing Activities of Continuing Operations:
Proceeds from Issuance of Long-term Debt	2,429	4,013
Repayments of Long-term Debt	2,092	1,611
Increase in short-term borrowings, net	642	32
Proceeds from Common Stock issued under employee stock plans	6	22
Dividends paid on Common Stock	1,070	1,008
Repurchase of Common Stock	52	1,370
Other financing activities, net	(74)	(130)
Net cash flows used in financing activities of continuing operations	(211)	(52)
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents	(18)	95
Net increase in cash and cash equivalents	2,088	2,192
Cash and Cash Equivalents, beginning of year	9,018	7,189
Cash and Cash Equivalents, end of period	11,106	9,381
Restricted Cash	38	36
Cash and cash equivalents, end of period	$ 11,068	$ 9,345