XML 177 R1.htm IDEA: XBRL DOCUMENT v3.23.3
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2023
Mar. 31, 2023
Nov. 10, 2022
Sep. 30, 2022
Document Information [Line Items]        
Document Fiscal Period Focus FY      
Document Period End Date Sep. 30, 2023      
Document Fiscal Year Focus 2022      
Entity Well-known Seasoned Issuer Yes      
Entity Registrant Name MUELLER WATER PRODUCTS, INC.      
Entity Central Index Key 0001350593      
Current Fiscal Year End Date --09-30      
Entity Filer Category Large Accelerated Filer      
Document Type 10-K      
Property, plant and equipment, net $ 311.7     $ 301.6
Intangible Assets, Net (Including Goodwill) $ 427.7     $ 459.8
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Amendment Flag false      
Entity Common Stock, Shares Outstanding     156,112,060  
Entity Shell Company false      
Entity Emerging Growth Company false      
Entity Small Business false      
Entity Public Float   $ 2,149.2    
ICFR Auditor Attestation Flag true      
Document Financial Statement Error Correction [Flag] false