Mikehotel is correct on this.
If you file an IFR flight plan, log the flight as IFR. End of story.
If you want to record your time flying IMC, then log this in a separate column - though I can't see why you would want to log time spent flying IMC.
Employers are not the slightest bit interested in seeing how much time you have spent flying in clouds - what they are interested in is your experience flying under IFR. And as Mikehotel implies, this largely equates to time on type.
And for those who log time spent "flying with sole reference to instruments" as interpreted by some on here - how do you time it? Do you start a stopwatch every time you fly into a cloud?