Financial Instruments - Short-term Borrowings (Details) - USD ($) $ in Millions		Sep. 27, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Commercial paper		$ 10,990	$ 13,915
Current portion of long-term debt, principal amount		2,152	1,458
Other short-term borrowings, principal amount	[1]	226	860
Total short-term borrowings, principal amount		13,367	16,233
Net fair value adjustments related to hedging and purchase accounting		0	5
Net unamortized discounts, premiums and debt issuance costs		(4)	(43)
Total Short-term borrowings, including current portion of long-term debt, carried at historical proceeds, as adjusted		$ 13,363	$ 16,195

[1] Other short-term borrowings primarily include cash collateral. See Note 7E.