The full stainless clad is dishwasher safe. The copper exterior pans won't be destroyed by a dishwasher, but, lordy, you'll spend more time polishing them than you will washing them by hand if you do. (And, yes, you'll need to -- corroded copper isn't nearly as good a conductor of heat)

Obviously, the non-stick pans aren't, but that's universal for non-stick you want to last.