Much of Elon Musk's Twitter deal is still a mystery

The world's richest man wasn't convinced he'd be successful in his bid to buy Twitter, one of the most influential social media companies on the planet.

But Tesla CEO Elon Musk pulled it off. On Monday, Twitter announced that it had reached a deal to sell the company to Musk for $54.20 a share, days after Musk announced he'd lined up $46.5 billion in financing.