In a parallelogram, the diagonals bisect each other. This means that if we denote the length of segment \( BE \) as 11 units, then \( DE \) (which is the segment that is opposite to \( BE \) in the bisected diagonal) will also measure the same length since they are segments created by the diagonal that divides the parallelogram.
Therefore, if \( BE = 11 \) units, then \( DE \) will also measure:
\[ DE = 11 \text{ units} \]
So, the length of segment \( DE \) is 11 units.