Derivative Instruments and Hedging Activities Outstanding Commodity Hedge Contracts (Details)	Sep. 30, 2013 T lb	Sep. 30, 2012 lb T
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Pounds of Copper	14,705,000	13,135,000
Metric Tons of Lead	23,900	21,200
Metric Tons of Aluminum	2,709	2,868
Metric Tons of Tin	2,052	1,344