Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Cash Flows [Abstract]
Net income from Continuing Operations	$ 3,000	$ 2,778
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,039	960
Deferred income tax provision	502	220
Stock compensation cost	96	96
Change in:
Accounts receivable	951	679
Inventories and contracts in progress	1,066	466
Other current assets	(27)	23
Accounts payable and accrued liabilities	1,436	572
Global pension contributions	79	107
Canadian Government Settlement	(246)	(237)
Other operating activities, net	619	508
Net cash flows provided by operating activities of continuing operations	3,139	2,606
Investing Activities of Continuing Operations:
Capital expenditures	771	649
Investments in businesses	168	538
Dispositions of businesses	19	50
Proceeds from the sale of the investment in Watsco Inc.	596	0
(Increase) in customer financing assets	240	55
Increase in collaboration intangible assets	195	199
(Payments) receipts from settlements of derivative contracts	294	(86)
Other investing activities, net	(63)	75
Net cash flows used in investing activities of continuing operations	(990)	(1,380)
Financing Activities of Continuing Operations:
Proceeds from Issuance of Long-term Debt	4,013	2,466
Repayments of Long-term Debt	1,611	144
Increase in short-term borrowings, net	32	(178)
Proceeds from Common Stock issued under employee stock plans	22	5
Dividends paid on Common Stock	1,008	1,035
Repurchase of Common Stock	1,370	36
Other financing activities, net	(130)	(164)
Net cash flows (used in) provided by financing activities of continuing operations	(52)	914
Discontinued Operations:
Net cash flows used in operating activities of discontinued operations	0	(2,457)
Cash Provided by (Used in) Operating Activities, Discontinued Operations	0	(2,463)
Net cash provided by investing activities of discontinued operations	0	6
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents	95	10
Net (decrease) increase in cash and cash equivalents	2,192	(307)
Cash and Cash Equivalents, beginning of year	7,189	7,120
Cash and Cash Equivalents, end of period	9,381	6,813
Restricted Cash	36	28
Cash and cash equivalents, end of period	$ 9,345	$ 6,785