How much does a famous brand cost?

Today we will have something more relaxed news for you. When we talk about Coco Cola we,it will remind us of it's red brand the same thing happens when we talk about Nike, the check will soon come into your head. It is a big decision when the company are ready to change their brand. And do you know how much it take to change a famous brand?
Recently Microsoft decide to change their brand for the 25 yeas. However Microsoft leveraged employees’ design skills to develop the new identity for free. However if they give this to a brand design company the cost will easily scale up to about half a million. Can we expect more brands to take this route as they seek ways to cut cost and be more efficient?