0001410636 2020-12-10 2020-12-10 American Water Works Company, Inc. 0001410636 false --12-31 8-K 2020-12-10 001-34028 DE 51-0063696 1 Water Street Camden NJ 08102-1658 856 955-4001 false false false false false Common stock, par value $0.01 per share AWK NYSE 2020-12-10