Condensed Consolidated Statement of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Sales
Products and solutions	$ 1,363.5	$ 1,414.7	$ 2,697.7	$ 2,740.2
Services	159.3	146.4	314.3	294.8
Total sales	1,522.8	1,561.1	3,012.0	3,035.0
Cost of sales
Products and solutions	(794.2)	(839.5)	(1,569.0)	(1,592.3)
Services	(112.2)	(103.3)	(219.3)	(205.7)
Total cost of sales	(906.4)	(942.8)	(1,788.3)	(1,798.0)
Gross profit	616.4	618.3	1,223.7	1,237.0
Selling, general and administrative expenses	(376.8)	(373.1)	(750.3)	(735.5)
Other income (expense)	2.8	(6.9)	1.6	(5.3)
Interest expense	(15.3)	(15.0)	(30.7)	(30.0)
Income before taxes	227.1	223.3	444.3	466.2
Income tax provision	(51.2)	(55.5)	(107.0)	(115.1)
Net income	$ 175.9	$ 167.8	$ 337.3	$ 351.1
Earnings Per Share, Basic [Abstract]
Basic	$ 1.25	$ 1.18	$ 2.41	$ 2.47
Earnings Per Share, Diluted [Abstract]
Diluted	$ 1.24	$ 1.16	$ 2.38	$ 2.43
Cash dividends per share	$ 0.47	$ 0.425	$ 0.94	$ 0.85
Weighted average outstanding shares:
Basic	140.0	142.5	139.6	142.1
Diluted	141.8	144.7	141.4	144.3