Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2011 Maximum [Member]	Sep. 30, 2011 Minimum [Member]	Sep. 30, 2011 Capitalized Software [Member]	Sep. 30, 2011 Software Development Technology [Member]	Dec. 31, 2010 Encompass Group, LLC [Member]	Nov. 30, 2010 Encompass Group, LLC [Member]	Nov. 09, 2009 Encompass Group, LLC [Member]
Ownership percentage									40.00%	40.00%	60.00%
Amount of redemption of auction rate securities	$ 14,100,000
Proceeds from exercise of put option related to auction rate securities	12,000,000
Percentage of LIFO inventory		60.00%	65.00%
Excess of current costs over reported LIFO value		2,200,000	1,200,000
Total depreciation expense		74,300,000	72,800,000	74,300,000
Intangible assets useful life in years, minimum		3					3	3
Intangible assets useful life in years, maximum		20					10	5
Amortization expense		29,600,000	26,900,000	25,900,000
Net book value of computer software costs		48,500,000	58,800,000
Amortization of computer software costs		19,100,000	17,500,000	16,600,000
Term of warranty, years		1
Deductibles and self-insured retentions, per occurrence					1,500,000	150,000
Research and development costs		63,800,000	58,300,000	55,700,000
Amount spent on software capitalized during the year		2,100,000	4,800,000	5,800,000
Advertising costs		$ 4,000,000	$ 4,300,000	$ 4,000,000
Maximum maturity period of derivative instruments, months		15