The population for this study will be adult subjects (>=18 and <=80 years) with a diagnosis of asthma who have a pre-bronchodilator forced expiratory volume in one second (FEV1) of 40% to 85% of the predicted normal value, and are receiving a stable dose of inhaled corticosteroid inhaled corticosteroid (ICS) with or without long-acting beta-adrenergic agonist (LABA) prior to screening.