Originally Posted by MattP.
not if you are on a bike. you are not required to carry an ID to operate a bike. So no, if you are on a bike, they can not detain you for having no ID.
You are required to carry a state issued ID* with you at ALL times, even sunbathing on the beach. When Bush visited FL years ago, they wanted to clear the streets, so they arrested all the homeless people who didn't have a valid state issued ID. This applies to all ages.
* even if you can't drive, you just don't have a license is all.