I have installed IntelliJIdea 14.0.2 just now. I do not know its default editor but it is opening my source files in vi option now. So, not letting me do default ac
vi
If you wanna use vim and also shortcuts like Ctrl+C/Ctrl+V/Ctrl+X, you may redefine the shortcuts as IDE shortcuts in:
File-->Settings-->Other Settings-->Vim Emulator