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Loss Contingencies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 6 Months Ended 3 Months Ended
Sep. 30, 2014
Dec. 31, 2002
Environmental Issue
Ellsworth Industrial Park Site
defendants
Sep. 30, 2014
Asbestos Issue
Stearns
Claimants
Sep. 30, 2014
Asbestos Issue
Prager
Lawsuits
Sep. 30, 2014
Asbestos Issue
Falk
Claimants
Sep. 30, 2014
Asbestos Issue
Zurn
Claimants
Lawsuits
Mar. 31, 2013
Damages from Product Defects
Zurn
Feb. 28, 2013
Damages from Product Defects
Zurn
Loss Contingency, Information about Litigation Matters [Abstract]                
Indemnification Resulting from Business Acquisition, Amount $ 900              
Loss Contingency, Number of Defendants   10            
Indemnification Resulting from Business Acquisition, Percentage of Costs Paid to Date by Seller   100.00% 100.00%   100.00%      
Loss Contingency, Pending Claims, Number     1,000   100 26,000    
Loss Contingency, Pending Lawsuits, Number       2   7,000    
Insurance Coverage, Percentage of Costs Paid to Date by Insurance Providers       100.00%        
Timeframe of Estimated Claims Disbursements           10 years    
Estimated Claim Payments Made Over Specified Period           29.0    
Loss Contingency, Settlement Agreement, Consideration             20  
Loss Contingency, Settlement Agreement, Attorney Fees               8.5
Loss Contingency, Estimate [Abstract]                
Loss Contingency, Estimate of Possible Loss           36.0    
Estimated Insurance Recoveries           $ 36.0    
Claim Settlement Funding Period             7 years