v3.19.3.a.u2
Financial Instruments (Contractual Maturity Date of Marketable Debt Securities) (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Fair Value Disclosures [Abstract]  
Due in 1 year $ 20,392
Due in 1 year through 5 years 63,151
Due in 5 years through 10 years 2,671
Due after 10 years 11,667
Total $ 97,881