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, 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)			3				0
Issuance of shares under employees' and directors' stock plans	182		$ 3	258			$ (79)
Stock-based compensation	145			145
Purchases of company common stock (in shares)							4
Purchases of company common stock	(1,500)						$ (1,500)
Dividends declared	(263)				(263)
Net income	3,877				3,877
Other comprehensive items	(291)							(291)
Balance (in shares) at Sep. 26, 2020			437				40
Balance at Sep. 26, 2020	31,824		$ 437	15,467	25,705		$ (6,815)	(2,970)
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)
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	33		$ 1	81			$ (49)
Stock-based compensation	52			52
Dividends declared	(88)				(88)
Net income	1,933				1,933
Other comprehensive items	19							19
Balance (in shares) at Sep. 26, 2020			437				40
Balance at Sep. 26, 2020	31,824		$ 437	15,467	25,705		$ (6,815)	(2,970)
Balance (in shares) at Dec. 31, 2020			437				40
Balance at Dec. 31, 2020	34,507		$ 437	15,579	28,116		$ (6,818)	(2,807)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under employees' and directors' stock plans (in shares)			2				1
Issuance of shares under employees' and directors' stock plans	137		$ 2	228			$ (93)
Stock-based compensation	153			153
Purchases of company common stock (in shares)							4
Purchases of company common stock	(2,000)						$ (2,000)
Dividends declared	(307)				(307)
Net income	6,067				6,067
Other comprehensive items	153							153
Balance (in shares) at Oct. 02, 2021			439				45
Balance at Oct. 02, 2021	38,710		$ 439	15,960	33,876		$ (8,911)	(2,654)
Balance (in shares) at Jul. 03, 2021			438				45
Balance at Jul. 03, 2021	36,854		$ 438	15,826	32,076		$ (8,856)	(2,630)
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	29		$ 1	83			$ (55)
Stock-based compensation	51			51
Dividends declared	(102)				(102)
Net income	1,902				1,902
Other comprehensive items	(24)							(24)
Balance (in shares) at Oct. 02, 2021			439				45
Balance at Oct. 02, 2021	$ 38,710		$ 439	$ 15,960	$ 33,876		$ (8,911)	$ (2,654)