Debt (Details) - USD ($) $ in Millions	6 Months Ended
Jul. 04, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt principal	$ 14,428	$ 13,117
Less unamortized debt issuance costs and discounts	122	119
Total debt	14,306	12,998
Less current portion	2,821	3,003
Long-term debt	$ 11,485	9,995
Commercial paper
Debt Instrument [Line Items]
Weighted average interest rate	0.252%
Short-term debt	$ 2,000	0
Fixed Rate Notes Due May 2021
Debt Instrument [Line Items]
Interest rate	3.00%
Long term debt	$ 0	2,000
Fixed Rate Notes Due July 2021
Debt Instrument [Line Items]
Interest rate	3.875%
Long term debt	$ 500	500
Fixed Rate Notes Due November 2022
Debt Instrument [Line Items]
Interest rate	2.25%
Long term debt	$ 1,000	1,000
Fixed Rate Notes Due May 2023
Debt Instrument [Line Items]
Interest rate	3.375%
Long term debt	$ 750	750
Fixed Rate Notes Due August 2023
Debt Instrument [Line Items]
Interest rate	1.875%
Long term debt	$ 500	500
Fixed Rate Notes Due November 2024
Debt Instrument [Line Items]
Interest rate	2.375%
Long term debt	$ 500	500
Fixed Rate Notes Due April 2025
Debt Instrument [Line Items]
Interest rate	3.25%
Long term debt	$ 750	750
Fixed Rate Notes Due May 2025
Debt Instrument [Line Items]
Interest rate	3.50%
Long term debt	$ 750	750
Fixed Rate Notes Due June 2026
Debt Instrument [Line Items]
Interest rate	1.15%
Long term debt	$ 500	0
Fixed Rate Notes Due August 2026
Debt Instrument [Line Items]
Interest rate	2.125%
Long term debt	$ 500	500
Fixed Rate Notes Due April 2027
Debt Instrument [Line Items]
Interest rate	3.50%
Long term debt	$ 750	750
Fixed Rate Notes Due November 2027
Debt Instrument [Line Items]
Interest rate	2.625%
Long term debt	$ 500	500
Fixed Rate Notes Due May 2028
Debt Instrument [Line Items]
Interest rate	3.75%
Long term debt	$ 1,000	1,000
Fixed Rate Notes Due April 2030
Debt Instrument [Line Items]
Interest rate	3.625%
Long term debt	$ 1,000	1,000
Fixed Rate Notes Due June Two Thousand Thirty One
Debt Instrument [Line Items]
Interest rate	2.25%
Long term debt	$ 500	0
Fixed Rate Notes Due April 2040
Debt Instrument [Line Items]
Interest rate	4.25%
Long term debt	$ 750	750
Fixed Rate Notes Due June 2041
Debt Instrument [Line Items]
Interest rate	2.85%
Long term debt	$ 500	0
Fixed Rate Notes Due November 2042
Debt Instrument [Line Items]
Interest rate	3.60%
Long term debt	$ 500	500
Fixed Rate Notes Due April 2050
Debt Instrument [Line Items]
Interest rate	4.25%
Long term debt	$ 750	750
Floating Rate Notes Due May 2021 \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	0.38%
Short-term debt	$ 0	500
Other Debt Securities
Debt Instrument [Line Items]
Other Interest rate	Various
Long term debt	$ 428	$ 117

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Debt, Long-term And Short-term, Combined Amount, Excluding Current Maturities

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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