I agree with your correction. I originally wasn't sure which foreign tax credit OP meant, which lead to my confusing mixture of links and references (the link I posted doesn't help when it, also, mentions "earned income"). I'll edit my original post to clear away the incorrect link and description.
If OP earns money in a foreign country, the first ~$100k doesn't require paying U.S. taxes. I think there's a housing allowance, as well.