Business Segment Information (Details 2) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Sales and property by geographic region
Sales	$ 1,538.6	$ 1,474.0	$ 1,440.3	$ 1,426.6	$ 1,607.5	$ 1,575.2	$ 1,550.8	$ 1,574.4	$ 5,879.5	$ 6,307.9	$ 6,623.5
Property	578.3				605.6				578.3	605.6	632.9
United States [Member]
Sales and property by geographic region
Sales									3,213.4	3,446.8	3,414.6
Property	445.4				472.1				445.4	472.1	497.5
Canada [Member]
Sales and property by geographic region
Sales									316.4	366.6	437.0
Property	7.3				7.3				7.3	7.3	7.6
Europe, Middle East and Africa [Member]
Sales and property by geographic region
Sales									1,147.2	1,174.0	1,351.8
Property	49.9				50.4				49.9	50.4	48.8
Asia Pacific [Member]
Sales and property by geographic region
Sales									764.4	834.5	884.0
Property	37.4				41.9				37.4	41.9	37.3
Latin America [Member]
Sales and property by geographic region
Sales									438.1	486.0	536.1
Property	$ 38.3				$ 33.9				$ 38.3	$ 33.9	$ 41.7