Does my job pay me when I figure out a work related problem when I’m in the shower at 6am. Or for reading a random white paper at 2am? I’m not building car par

Does my job pay me when I figure out a work related problem when I’m in the shower at 6am. Or for reading a random white paper at 2am? I’m not building car parts. My job is thinking and I literally do it every waking hour. I could care less if and when my coworkers show up as long as they’re getting work done.