Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Net income from Continuing Operations	$ 4,312	$ 4,533
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,456	1,401
Deferred income tax provision	273	444
Stock compensation cost	112	108
Change in:
Accounts receivable	636	430
Inventories and contracts in progress	864	1,070
Other current assets	27	100
Accounts payable and accrued liabilities	774	(88)
Global pension contributions	125	93
Canadian Government Settlement	(237)	0
Other operating activities, net	502	661
Net cash flows provided by operating activities of continuing operations	4,536	4,044
Investing Activities of Continuing Operations:
Capital expenditures	1,043	1,044
Investments in businesses	535	329
Dispositions of businesses	148	172
Increase in customer financing assets, net	74	128
Increase in collaboration intangible assets	301	331
(Payments) receipts from settlements of derivative contracts	29	(147)
Other investing activities, net	15	(97)
Net cash flows used in investing activities of continuing operations	(1,849)	(1,416)
Financing Activities of Continuing Operations:
Issuance of long-term debt, net	2,281	4
(Decrease) increase in short-term borrowings, net	(63)	2,891
Proceeds from Common Stock issuance - equity unit remarketing	0	1,100
Proceeds from Common Stock issued under employee stock plans	6	39
Dividends paid on Common Stock	1,561	1,643
Repurchase of Common Stock	528	4,000
Other financing activities, net	(338)	(252)
Net cash flows used in financing activities of continuing operations	(203)	(1,861)
Discontinued Operations:
Net cash used in operating activities	(2,486)	(299)
Net cash provided by (used in) investing activities	6	(66)
Net cash used in financing activities	0	(1)
Net cash flows used in discontinued operations	(2,480)	(366)
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents	28	(143)
Net increase in cash and cash equivalents	32	258
Cash and Cash Equivalents, beginning of year	7,075	5,235
Cash and Cash Equivalents, end of period	7,107	5,493
Less: Cash and cash equivalents of businesses held for sale	0	16
Cash and cash equivalents, end of period	$ 7,107	$ 5,477