At the Disney Institute in Florida some months ago a colleague took a class on creativity. She reports that the Disney Imagineering philosophy is to relentlessly separate ideas from identity. That is, if you invent something you shouldn't cling to it and feel that you must "own" it and develop it. Rather, you should share it with others and enlist their help in developing it. Collaboration is crucial in making something great. All ideas are built upon older ones.
Of course, the Disney Corporation doesn't exactly practice this philosophy itself, as it lobbies for limitless copyright and trademark extensions to keep Mickey Mouse and similar characters out of the public domain for decades or centuries!