VERY URGENT: How can i sell my business ideas to the Companies which can use and earn a lot of money for that?

For example, I found a new IDEA to produce a product that very profitable.



Also I cannot produce it myself too, besause I do not have that factory to do that.



So I really want to sell them to the companies but I am afraid of that if they say that;

-Ok good, but we do not interested that product,

But then they want to produce, after getting the idea!



What can I do?