I just did my idler arm and I had to use a pickle fork to get it to budge loose.
I didn't take pics, but basically for the idler arm, you remove the cotter pin and that bolt should be fairly loose. Take it off, use the pickle fork to separate it, then it's either a 12mm or a 14mm socket to take off the other 3 bolts. You will need 2 sockets as there are nuts as well.
Took me over an hour without the pickle fork, and couldn't finish. With the pickle fork, I could change it again in 15 mins.