It really depends upon the type of cardio exercise you perform.
Lolly-gagging on the elliptical at a steady pace for 45 minutes is all well and good, but your post-exercise oxygen consumption (EPOC) is typically not very strong after such a workout, meaning you won't continue to burn more calories than usual in the hours following exercise.
High-intensity interval training speeds up your metabolism during the workout and for hours after.
And weight lifting? In general, weight training and resistance exercises result in a greater energy expenditure (i.e., burning more calories post-workout) than steady-pace cardio.