What are the differences between Autocratic, Laissez-Faire and Democratic leadership styles?

Autocratic - manager exerts control over all decisions and receives very little or no input from employees or group members. Autocratic leaders make decisions based on their own thoughts and rarely seek advice from others.
Democratic - manager empowers and supports staff, allowing employees to have a more participative role in the decision making process.
Laissez-Faire - leader/manager does not engage in decision making but instead gives a degree of power to employees. Employees have more control over their work.