For the Record might be more of a metaphor than an idiom, but it could still be confusing. There are several different instances where this phrase would be used literally. If someone was making a recording, it might be for a record. (It's what we "old folk" used to play before CDs, mp3s, or iPods. lol)
It is this last case that is probably closest to the use of this phrase in casual conversation (like in my last blog post). I wanted to make sure that everyone knew for the record, as if I had sat down with a journalist, that getting up early in the morning is difficult for me. But let me add, that I can do it if I have to, but breakfast doesn't qualify. lol
See you tomorrow with You Snooze; You Lose, which, under the circumstances, seems quite fitting!