Financial Instruments - Short-term Borrowings (Details) - USD ($) $ in Millions		Mar. 29, 2020	Dec. 31, 2019
Financial Instruments [Abstract]
Commercial paper		$ 14,908	$ 13,915
Current portion of long-term debt, principal amount		334	1,458
Other short-term borrowings, principal amount	[1]	800	860
Total short-term borrowings, principal amount		16,042	16,233
Net fair value adjustments related to hedging and purchase accounting		3	5
Net unamortized discounts, premiums and debt issuance costs		(38)	(43)
Total Short-term borrowings, including current portion of long-term debt, carried at historical proceeds, as adjusted	[2]	$ 16,007	$ 16,195

[1] Other short-term borrowings primarily include cash collateral. For additional information, see Note 7E.

[2] Amounts may not add due to rounding.