Document and Entity Information Document |
Jul. 01, 2026 |
|---|---|
| Document Information [Line Items] | |
| Document Type | 8-K/A |
| Document Period End Date | Jul. 01, 2026 |
| Entity Registrant Name | American Water Works Company, Inc. |
| Entity File Number | 001-34028 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 51-0063696 |
| Entity Address, Address Line One | 1 Water Street |
| Entity Address, City or Town | Camden |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 08102-1658 |
| City Area Code | 856 |
| Local Phone Number | 955-4001 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | AWK |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001410636 |
| Amendment Flag | true |
| Amendment Description | American Water Works Company, Inc. is filing this amendment to its Current Report on Form 8-K originally filed with the Securities and Exchange Commission on July 1, 2026 (the “Original Form 8-K”), solely to correct the “document period end date” element of the Original Form 8-K’s cover page XBRL tags, provided as noted below under Exhibit 104, which inadvertently referenced an incorrect date. No other changes have been made to the disclosures contained in Items 8.01 and 9.01 of the Original Form 8-K or Exhibit 99.1 thereto. |