New Accounting Guidance New Acconting Guidance (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
New Accounting Pronouncements
Cost of goods sold	$ 8,566	$ 6,801
Selling, general and administrative expenses	1,276	1,061
Research and development expenses	443	425
Other operating (income) expenses	300	996
Total operating costs	10,751	9,442
Operating profit	2,108	380
Other income (expense)	$ 127	32
Previously Reported
New Accounting Pronouncements
Cost of goods sold		6,758
Selling, general and administrative expenses		1,045
Research and development expenses		418
Other operating (income) expenses		1,025
Total operating costs		9,405
Operating profit		417
Other income (expense)		(5)
Components of net periodic benefit cost
New Accounting Pronouncements
Cost of goods sold		43
Selling, general and administrative expenses		16
Research and development expenses		7
Other operating (income) expenses		(29)
Total operating costs		37
Operating profit		(37)
Other income (expense)		$ 37