Business Combinations (Supplemental Pro Forma Information) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Business Combinations [Abstract]
Net sales	$ 1,062.2	$ 997.4	$ 2,233.3	$ 2,048.5
Earnings from continuing operations	$ 29.4	$ 45.3	$ 73.9	$ 88.3
Basic earnings per share from continuing operations	$ 0.53	$ 0.82	$ 1.34	$ 1.61
Diluted earnings per share from continuing operations	$ 0.52	$ 0.81	$ 1.31	$ 1.59