That is crazy background usage. There's 2 things I would try. Firstly try the beta version or rollback Google Play Services to the factory version, reboot your phone and update Play Services. You can do this through settings, app, Google Play Services, then select the menu on the top right and uninstall updates.
It might be an app that is not compatible with the recent update you have got... I speak from experience; mine was not showing up on the list of apps using my CPU, but then I started deleting apps in safe mode. Now my phone lasts me a full day with one charge and doesn't heat up as much.
This is the response I got after reporting this issue
After analysing the error logs you sent in, we can see temperature increases have occurred due to a mix of direct sunlight, along with an issue with navigation services, which we have fixed in the latest software update. Please update your phone as soon as it is available. You can set your phone to auto download the update through Wi-Fi through Settings > Software Update. Also make sure to not keep your phone in direct sunlight for prolonged periods of time.