(colloquial) Used to introduce a rebuttal to the interlocutor's previous statement, especially when the statement angered or offended the speaker.
For your information, my son was a straight A student in college, so he's not just some schmo!
(colloquial) Used as a satiric preface to highlight information that an interlocutor should already know or should be able to surmise.
For your information, you're reading English in Wiktionary.
Used other than figuratively or idiomatically: see for, your, information.
I kept the dates and times in the logbook for your information.
for-your-information