0001002910 2024-05-09 2024-05-09 0001002910 AEE:UnionElectricCompanyMember 2024-05-09 2024-05-09 0001002910 AEE:AmerenIllinoisCompanyMember 2024-05-09 2024-05-09 iso4217:USD shares iso4217:USD shares false 0001002910 0000100826 false 8-K 2024-05-09 false false false false 0000018654 false 8-K 2024-05-09 false false false false 8-K 2024-05-09 1-14756 Ameren Corporation MO 1901 Chouteau Avenue St. Louis MO 63103 314 621-3222 43-1723446 1-2967 Union Electric Company MO 1901 Chouteau Avenue St. Louis MO 63103 314 621-3222 43-0559760 1-3672 Ameren Illinois Company IL 10 Richard Mark Way Collinsville IL 62234 618 343-8150 37-0211380 false false false false Common Stock, $0.01 par value per share AEE NYSE false false false