Financial Instruments - Long-Term Debt (Details) - USD ($) $ in Millions	Oct. 03, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Net unamortized discounts, premiums and debt issuance costs	$ (1)	$ (2)
Total long-term debt, carried at historical proceeds, as adjusted	36,250	37,133
Current portion of long-term debt, carried at historical proceeds, as adjusted (not included above)	2,663	2,002
Unsecured Debt [Member]
Debt Instrument [Line Items]
Total long-term debt, principal amount	34,975	35,774
Net fair value adjustments related to hedging and purchase accounting	1,470	1,562
Net unamortized discounts, premiums and debt issuance costs	(200)	(207)
Other long-term debt	4	4
Total long-term debt, carried at historical proceeds, as adjusted	36,250	37,133
Current portion of long-term debt, carried at historical proceeds, as adjusted (not included above)	$ 2,663	$ 2,002