You may hate this but I usually put my recommendations in PowerPoint, with my name on it and the options and suggestions. I then share it and discuss it with mu

You may hate this but I usually put my recommendations in PowerPoint, with my name on it and the options and suggestions. I then share it and discuss it with multiple people. If he tries to claim it, well his boss already knows or other peers of his. At the end of the day if he does take credit and no one knows… the bright side is you had a good idea, go somewhere else where they will recognise you for it.