XML 83 R1.htm IDEA: XBRL DOCUMENT v2.4.0.8
Document and Entity Information (USD $)
 12 Months Ended
Sep. 30, 2014
Nov. 13, 2014
Mar. 31, 2014
Document Information [Line Items]      
Document Fiscal Period Focus FY    
Document Period End Date Sep. 30, 2014    
Document Fiscal Year Focus 2014    
Entity Well-known Seasoned Issuer No    
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    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   159,893,168  
Entity Public Float     $ 1,484,364,260