Showing quick documentation/method reference of symbol at caret Follow

I'm refering to this article, under "Quick Documentation": https://www.jetbrains.com/help/phpstorm/viewing-reference-information.html

"To view documentation for a symbol at caret, press Ctrl+Q"

But if I do that, I get something like this:

Which doesn't tell me anything about the class methods and their arguments etc. So now instead I use CTRL+B which opens the class in the editor so I can check it's structure. I would much rather see a meaningful quick doc in that popup. Any clues?