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Litigation and Environmental Matters (Details)
$ in Millions
Sep. 30, 2015
USD ($)
Loss Contingencies  
Maximum expected cleanup exposure for individual site $ 4
Maximum expected cleanup exposure in aggregate 15
Other legal proceedings and environmental exposures  
Loss Contingencies  
Other legal proceedings or environmental exposure, minimum 50
Other legal proceedings or environmental exposure, maximum 65
Recorded reserve balance for legal proceedings and exposures $ 60