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, 2016		415			22
Balance at Dec. 31, 2016	$ 21,540	$ 415	$ 12,140	$ 13,927	$ (2,306)	$ (2,636)
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	131	$ 3	173		$ (45)
Issuance of shares (in shares)		10
Issuance of shares	1,690	$ 10	1,680
Stock-based compensation	116		116
Purchases of company common stock (in shares)					5
Purchases of company common stock	(750)				$ (750)
Dividends declared	(178)			(178)
Net Income	1,697			1,697
Other comprehensive items	453					453
Other	3		3
Balance (in shares) at Sep. 30, 2017		428			27
Balance at Sep. 30, 2017	24,702	$ 428	14,112	15,446	$ (3,101)	(2,183)
Balance (in shares) at Jul. 01, 2017		417			27
Balance at Jul. 01, 2017	22,391	$ 417	12,328	14,972	$ (3,070)	(2,256)
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	23	$ 1	53		$ (31)
Issuance of shares (in shares)		10
Issuance of shares	1,690	$ 10	1,680
Stock-based compensation	45		45
Dividends declared	(60)			(60)
Net Income	534			534
Other comprehensive items	73					73
Other	6		6
Balance (in shares) at Sep. 30, 2017		428			27
Balance at Sep. 30, 2017	24,702	$ 428	14,112	15,446	$ (3,101)	(2,183)
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)		3			0
Issuance of shares under employees' and directors' stock plans	127	$ 3	185		$ (61)
Stock-based compensation	137		137
Purchases of company common stock (in shares)					1
Purchases of company common stock	(250)				$ (250)
Dividends declared	(206)			(206)
Net Income	2,040			2,040
Other comprehensive items	(428)					(428)
Other	27		27
Balance (in shares) at Sep. 29, 2018		431			28
Balance at Sep. 29, 2018	26,890	$ 431	14,526	17,866	$ (3,414)	(2,519)
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)
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	37	$ 1	72		$ (36)
Stock-based compensation	46		46
Purchases of company common stock (in shares)					1
Purchases of company common stock	(250)				$ (250)
Dividends declared	(69)			(69)
Net Income	709			709
Other comprehensive items	(28)					(28)
Balance (in shares) at Sep. 29, 2018		431			28
Balance at Sep. 29, 2018	$ 26,890	$ 431	$ 14,526	$ 17,866	$ (3,414)	$ (2,519)