not restricted to a particular religious denomination; as, a nondenominational school.

not restricted to a particular religious denomination; "a nondenominational church"

A non-denominational church (usually Christian) is a religious organization which does not necessarily align its mission and teachings to an established denomination. It is also often done to allow the church to govern themselves without interference from the policies of a regional, national or multinational organization, in regards to budgets, memberships, policies, formal standards, and public image. Source: http://en.wikipedia.org/wiki/Nondenominational