The Chazon Ish established in his, Hilchot Avodat Cochavim, siman 62, comment 19:
"That is to say that the Gentiles of their times believed in a Creator, however, they attributed a material nature and change to him, up to the point where they considered created matter as a god and therefore at the time when they recount the name of heaven [a euphemism for G-d] they associate [or make a partnership between] the Creator of heaven with something else so therefore this creates a leniency in the law against causing the name of an idol to be uttered, for indeed, the name which they recount is directed towards the Creator of Heaven; however there is an aspect of the association [or partnership] of the name of heaven with something else which is more severe than just recounting the name of idols.
And it is clarified, that a doubt never entered into the minds of our rabbis that it and those who serve it should have the status of idol worship, although they believe in a Creator of Heaven, for all that worship something that was created and attribute to it, an independent will [or free choice] and dominion, this is the main aspect of idolatry".