Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 1,933	$ 760	$ 3,877	$ 2,694
Basic Weighted Average Shares	396	401	396	400
Effect of Stock Options and Restricted Units	3	3	3	3
Diluted Weighted Average Shares	399	404	399	403
Basic Earnings Per Share (in dollars per share)	$ 4.88	$ 1.89	$ 9.79	$ 6.73
Diluted Earnings Per Share (in dollars per share)	$ 4.84	$ 1.88	$ 9.71	$ 6.68
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Stock Options Excluded From Computation Of Earnings Per Share	0	1	1	1