Hi Steve
You can do this is with Neil Blevins’ Soulburn Scripts (which I highly recommend). There is a tool in there called Object Detacher. This will detach multiple polygon elements and Spline segments into individual objects.
http://www.neilblevins.com/cg\_tools/soulburnscripts/soulburnscripts.htm
You may also need to select the spline vertices and break them first