A cellulolytic enzyme composition, comprising a polypeptide having cellulolytic enhancing activity, a CEL7 polypeptide having endoglucanase activity, a CEL12 polypeptide having endoglucanase activity, a CEL45 polypeptide having endoglucanase activity, a CEL7 polypeptide having cellobiohydrolase activity with a cellulose binding domain, and a CEL7 polypeptide having cellobiohydrolase activity without a cellulose binding domain and one or more polypeptides having beta-glucosidase activity; wherein the CEL7 polypeptide having endoglucanase activity is selected from the group consisting of: (i) a polypeptide comprising an amino acid sequence having at least 80% sequence identity to the mature polypeptide of SEQ ID NO: 2; and (ii) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 80% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 1; wherein the CEL12 polypeptide having endoglucanase activity is selected from the group consisting of: (i) a polypeptide comprising an amino acid sequence having at least 80% sequence identity to the mature polypeptide of SEQ ID NO: 4; and (ii) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 80% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 3; wherein the CEL45 polypeptide having endoglucanase activity is selected from the group consisting of: (i) a polypeptide comprising an amino acid sequence having at least 80% sequence identity to the mature polypeptide of SEQ ID NO: 6; and (ii) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 80% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 5; wherein the CEL7 polypeptide having cellobiohydrolase activity with a cellulose binding domain is selected from the group consisting of: (i) a polypeptide comprising an amino acid sequence having at least 80% sequence identity to the mature polypeptide of SEQ ID NO: 8; and (ii) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 80% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 7; and wherein the CEL7 polypeptide having cellobiohydrolase activity without a cellulose binding domain is selected from the group consisting of: (i) a polypeptide comprising an amino acid sequence having at least 80% sequence identity to the mature polypeptide of SEQ ID NO: 10; and (ii) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 80% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 9; and wherein the presence of the polypeptide having cellulolytic enhancing activity increases the degradation of the cellulose-containing material by the cellulolytic enzyme composition compared to the absence of the polypeptide having cellulolytic enhancing activity, and the polypeptide having cellulolytic enhancing activity is selected from the group consisting of: (a) a polypeptide comprising an amino acid sequence having at least 80% sequence identity to the mature polypeptide of SEQ ID NO: 22; (b) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having preferably at least 80%, sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 21. (a) a polypeptide comprising an amino acid sequence having at least 80% sequence identity to the mature polypeptide of SEQ ID NO: 22; (b) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having preferably at least 80%, sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 21.