New Accounting Guidance New Acconting Guidance (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements
Cost of goods sold	$ 9,422	$ 7,816	$ 17,988	$ 14,617
Selling, general and administrative expenses	1,440	1,304	2,716	2,365
Research and development expenses	462	458	905	883
Other operating (income) expenses	338	407	638	1,403
Total operating costs	11,844	10,147	22,595	19,589
Operating profit	2,167	1,184	4,275	1,564
Other income (expense)	$ 121	96	$ 248	128
Previously Reported
New Accounting Pronouncements
Cost of goods sold		7,769		14,527
Selling, general and administrative expenses		1,289		2,334
Research and development expenses		453		871
Other operating (income) expenses				1,432
Total operating costs		10,080		19,485
Operating profit		1,251		1,668
Other income (expense)		29		24
Components of net periodic benefit cost
New Accounting Pronouncements
Cost of goods sold		47		90
Selling, general and administrative expenses		15		31
Research and development expenses		5		12
Other operating (income) expenses				(29)
Total operating costs		67		104
Operating profit		(67)		(104)
Other income (expense)		$ 67		$ 104