Business Segment and Geographic Information (Schedule of Geographic Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Sales to External Customers Consolidated Total [Line Items]
Sales to External Customers	$ 2,484.2	$ 2,344.3	$ 5,046.6	$ 4,665.8
Europe [Member]
Sales to External Customers Consolidated Total [Line Items]
Sales to External Customers	649.0	661.5	1,296.6	1,293.1
Asia [Member]
Sales to External Customers Consolidated Total [Line Items]
Sales to External Customers	560.4	547.4	1,166.0	1,120.7
Latin America Other [Member]
Sales to External Customers Consolidated Total [Line Items]
Sales to External Customers	179.2	52.5	362.7	99.3
U.S./Canada [Member]
Sales to External Customers Consolidated Total [Line Items]
Sales to External Customers	$ 1,095.6	$ 1,082.9	$ 2,221.3	$ 2,152.7