Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Items [Member]
Balance (in shares) at Dec. 31, 2018			432				29
Balance at Dec. 31, 2018	$ 27,586	$ 4	$ 432	$ 14,621	$ 18,696	$ 4	$ (3,665)	$ (2,498)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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
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)
Balance (in shares) at Dec. 31, 2019			434				36
Balance at Dec. 31, 2019	29,675	$ (1)	$ 434	15,064	22,092	$ (1)	$ (5,236)	(2,679)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under employees' and directors' stock plans (in shares)			2				0
Issuance of shares under employees' and directors' stock plans	149		$ 2	177			$ (30)
Stock-based compensation	93			93
Purchases of company common stock (in shares)							4
Purchases of company common stock	(1,500)						$ (1,500)
Dividends declared	(175)				(175)
Net income	1,944				1,944
Other comprehensive items	(310)							(310)
Balance (in shares) at Jun. 27, 2020			436				40
Balance at Jun. 27, 2020	29,875		$ 436	15,334	23,860		$ (6,766)	(2,989)
Balance (in shares) at Mar. 28, 2020			435				40
Balance at Mar. 28, 2020	28,559		$ 435	15,186	22,791		$ (6,765)	(3,088)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under employees' and directors' stock plans (in shares)			1				0
Issuance of shares under employees' and directors' stock plans	101		$ 1	101			$ (1)
Stock-based compensation	47			47
Dividends declared	(87)				(87)
Net income	1,156				1,156
Other comprehensive items	99							99
Balance (in shares) at Jun. 27, 2020			436				40
Balance at Jun. 27, 2020	$ 29,875		$ 436	$ 15,334	$ 23,860		$ (6,766)	$ (2,989)