Highly concentrated liquid detergents with a surfactant content of 30 wt. % and more, also containing polymers in concentrations of 2 wt. % or more and displaying optimised product stability. The detergent having a specifically adapted surfactant system containing alkyl ether alkoxylates, alkyl(poly)gylcosides and additional surfactants. The invention also relates to methods for washing textiles using the described detergents and to the use thereof.