New Accounting Guidance New Acconting Guidance (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
New Accounting Pronouncements
Cost of Revenue	$ 9,022	$ 7,678	$ 27,010	$ 22,295
Revenues	13,510	11,413	40,380	32,566
Selling, general and administrative expenses	1,299	1,254	4,015	3,619
Research and development expenses	479	461	1,384	1,344
Other operating (income) expenses	390	348	1,028	1,751
Total operating costs	11,375	9,904	33,970	29,493
Operating profit	2,135	1,509	6,410	3,073
Other income (expense)	102	132	350	260
Previous Accounting Guidance
New Accounting Pronouncements
Cost of Revenue	8,997		27,020
Revenues	12,719		38,194
Other operating (income) expenses			1,034
Operating profit	$ 2,116		$ 6,396
Previously Reported
New Accounting Pronouncements
Cost of Revenue		7,633		22,160
Selling, general and administrative expenses		1,237		3,571
Research and development expenses		455		1,326
Other operating (income) expenses				1,780
Total operating costs		9,836		29,321
Operating profit		1,577		3,245
Other income (expense)		64		88
Components of net periodic benefit cost
New Accounting Pronouncements
Cost of Revenue		45		135
Selling, general and administrative expenses		17		48
Research and development expenses		6		18
Other operating (income) expenses				(29)
Total operating costs		68		172
Operating profit		(68)		(172)
Other income (expense)		$ 68		$ 172