Business Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Sales and property by geographic region
Sales	$ 1,664.0	$ 1,560.4	$ 1,561.1	$ 1,473.9	$ 1,654.3	$ 1,516.2	$ 1,464.1	$ 1,365.8	$ 6,259.4	$ 6,000.4	$ 4,857.0
Property	587.1				561.4				587.1	561.4	536.9
United States [Member]
Sales and property by geographic region
Sales									3,067.3	2,917.8	2,456.2
Property	458.8				446.1				458.8	446.1	424.9
Canada [Member]
Sales and property by geographic region
Sales									464.3	396.2	321.0
Property	8.6				9.2				8.6	9.2	9.7
Europe Middle East and Africa [Member]
Sales and property by geographic region
Sales									1,280.6	1,267.6	987.3
Property	41.6				42.6				41.6	42.6	40.3
Asia Pacific [Member]
Sales and property by geographic region
Sales									942.4	910.6	724.3
Property	39.4				36.8				39.4	36.8	34.2
Latin America [Member]
Sales and property by geographic region
Sales									504.8	508.2	368.2
Property	$ 38.7				$ 26.7				$ 38.7	$ 26.7	$ 27.8