tukey, 'tukey-kramer' or both in the function multcompare

I need to correctly report the method I use for analysis. Can anyone tell what method Mathworks refers to when they use 'tukey-kramer' in the function 'multcompare'? I am confused because the help text on the option for 'ctype' for function 'multcompare' satisfies both tukey and tukey-kramer methods of correction for multiple comparison. My question is does 'multcompare' choose tukey for balanced anova and tukey-kramer for unbalanced anova? Or does it always choose tukey-kramer and therefore has a misleading help text as regards to the tukey method?