Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Items [Member]
Balance (in shares) at Dec. 31, 2017		428			27
Balance at Dec. 31, 2017	$ 25,413	$ 428	$ 14,177	$ 15,914	$ (3,103)	$ (2,003)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes	30			118		(88)
Issuance of shares under employees' and directors' stock plans (in shares)		2			0
Issuance of shares under employees' and directors' stock plans	90	$ 2	113		$ (25)
Stock-based compensation	91		91
Dividends declared	(137)			(137)
Net Income	1,331			1,331
Other comprehensive items	(400)					(400)
Other	27		27
Balance (in shares) at Jun. 30, 2018		430			27
Balance at Jun. 30, 2018	26,445	$ 430	14,408	17,226	$ (3,128)	(2,491)
Balance (in shares) at Mar. 31, 2018		429			27
Balance at Mar. 31, 2018	26,123	$ 429	14,319	16,542	$ (3,125)	(2,042)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under employees' and directors' stock plans (in shares)		1
Issuance of shares under employees' and directors' stock plans	39	$ 1	41		$ (3)
Stock-based compensation	48		48
Dividends declared	(68)			(68)
Net Income	752			752
Other comprehensive items	(449)					(449)
Balance (in shares) at Jun. 30, 2018		430			27
Balance at Jun. 30, 2018	26,445	$ 430	14,408	17,226	$ (3,128)	(2,491)
Balance (in shares) at Dec. 31, 2018		432			29
Balance at Dec. 31, 2018	27,586	$ 432	14,621	18,696	$ (3,665)	(2,498)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes	4			4		0
Issuance of shares under employees' and directors' stock plans (in shares)		1			1
Issuance of shares under employees' and directors' stock plans	143	$ 1	170		$ (28)
Stock-based compensation	96		96
Purchases of company common stock (in shares)					3
Purchases of company common stock	(750)				$ (750)
Dividends declared	(152)			(152)
Net Income	1,934			1,934
Other comprehensive items	(132)					(132)
Balance (in shares) at Jun. 29, 2019		433			33
Balance at Jun. 29, 2019	28,729	$ 433	14,887	20,482	$ (4,443)	(2,630)
Balance (in shares) at Mar. 30, 2019		433			33
Balance at Mar. 30, 2019	27,693	$ 433	14,771	19,439	$ (4,441)	(2,509)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under employees' and directors' stock plans (in shares)		0			0
Issuance of shares under employees' and directors' stock plans	62	$ 0	64		$ (2)
Stock-based compensation	52		52
Dividends declared	(76)			(76)
Net Income	1,119			1,119
Other comprehensive items	(121)					(121)
Balance (in shares) at Jun. 29, 2019		433			33
Balance at Jun. 29, 2019	$ 28,729	$ 433	$ 14,887	$ 20,482	$ (4,443)	$ (2,630)