The ornamental design for a lid, as shown and described.
FIG. 1 is a right front perspective view of a lid showing our new design;
FIG. 2 is a right side view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
In the drawings, the evenly-spaced broken lines depict portions of the lid that form no part of the claimed design. Additionally, the dash-dot-dash broken lines define the boundaries of the claimed design.