Described are automatic dishwashing detergents, comprising a builder, a surfactant, and a polymer comprising units derived from at least one carboxylic acid monomer or its salt, at least one allyl glycidyl ether (AGE) and iminodiacetic acid (IDA), said polymer having Formula I: (Formula I) wherein m; n; R, R1, R2, and X are as defined herein. In some embodiments, an AGE and iminodiacetic acid (IDA) are first reacted to produce an ethylenically unsaturated aminocarboxylic acid monomer, which is then polymerized with at least one carboxylic acid monomer to produce the polymer having Formula I. Alternatively, an AGE is polymerized with at least one carboxylic acid monomer to produce a polymer, which is then reacted to graft IDA thereon to form the polymer having Formula I.