As far as I can tell, saying, "I made some mistakes in my youth, but there's no value in being specific about them" is not one of the Twelve Steps--

And if he stopped drinking at all(would it surprise you to know that sometimes alcoholics continue to drink even after telling people that they have stopped?) it wasn't by participating in any sort of rehabilitation program--his dad simply arranged for him to have a long talk with Billy Graham, which "Dubious" claimed was all it took for him to break loose from more than twenty years of lost weekends--