I worked at target on the flow team for about a year, i cant complain in the least, while i was not out to my other employees at work, I did Do whatever I wanted, long purple and blonde hair, painted nails, pink wallet and phone, etc no one said anything, i went by the name I wanted (they did ask me if I was sure i wanted to go by that name a few times).
I think working at target was great, but like any large compqny ymmv because it is the individual staffs interpretations of rules and regulations but the woreing of company policy is very lgbt friendly.