[NTSysADM] Credentials needed to add/remove DC from domain

[Heaton, Joseph@Wildlife]

Looking at upgrading our DCs to 2012R2.  In order to use DCPromo to demote 
existing and remove them from AD, and to use DCPromo to promote the new ones, 
do I need Domain Admin, or Enterprise Admin?  I'm seeing contradictory 
information on the interwebz.

Thanks,

Joe Heaton