You're confusing things here by talking about the "Details Mode layout".
Layouts and styles are two different things, but Details Mode is neither of them.
Details Mode is a view mode. (Thumbnails, List and Large Icons are some other examples of view modes.) Changing the view mode will never change which columns are present. If you want to just change the view mode you can do so via the View menu (and via several other places).
The view mode can also be changed by applying a style. One of the default styles is called "Explorer" and I think it's that style which you've been (incorrectly) calling "Details Mode."
Which columns are displayed is determined by the folder format. The folder format can be modified by styles.
However, by default, none of the styles touch the folder format or which columns are displayed.
If any of your styles are modifying the displayed columns then they must've been edited from the defaults. You can undo that by going to Settings ->Preferences / Listers / Styles and working down the list of styles, making sure that the Format checkbox near the bottom-left is turned off for all of them. (Do that for both the Left File Display and Right File Display tabs.)
Also, you can quickly see if any of your styles change the format because the description of them in the list will include "change format".