Kmart tried a couple of new formats in the 1990s. In this shot we see the Kmart Super Center, which debuted -in Medina, Ohio- in 1991. Super Centers included a full-line grocery store. 
Photo from Wikipedia / "Caldorwards4"


Here we have an example of a Big Kmart. This store prototype, a remodeling of existing locations, debuted -in Chicago- in 1997. It did not include a supermarket. These stores are gradually being phased out, with several locations having been returned to the standard Kmart format.
Photo from Wikipedia / "Caldorwards4"