Financial Instruments - Total Short-Term and Long-Term Investments and Equity Method Investments (Details) - USD ($) $ in Millions		Mar. 29, 2020	Dec. 31, 2019
Short-term investments
Equity securities with readily determinable fair value	[1],[2]	$ 4,190	$ 705
Available-for-sale debt securities		2,812	6,687
Held-to-maturity debt securities		1,198	1,133
Total Short-term investments	[3]	8,199	8,525
Long-term investments
Equity securities with readily determinable fair values		1,603	1,902
Available-for-sale debt securities		296	315
Held-to-maturity debt securities		40	42
Private equity securities at cost		757	756
Total Long-term investments	[3]	2,696	3,014
Equity-method investments	[3]	15,524	17,133
Total long-term investments and equity-method investments		18,220	20,147
Held-to-maturity cash equivalents		$ 401	$ 163

[1] As of March 29, 2020 and December 31, 2019, equity securities with readily determinable fair values included money market funds primarily invested in U.S. Treasury and government debt.

[2] As of March 29, 2020 and December 31, 2019, equity securities with readily determinable fair values included money market funds primarily invested in U.S. Treasury and government debt.

[3] Amounts may not add due to rounding.