Summary Of Significant Accounting Policies (Narrative) (Details)	12 Months Ended								3 Months Ended												12 Months Ended
	Sep. 30, 2013 USD ($) customers M	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($) customers	Sep. 30, 2010 USD ($)	Sep. 30, 2013 Accounts Receivable [Member] USD ($)	Sep. 30, 2012 Accounts Receivable [Member] USD ($)	Sep. 30, 2013 Other Assets [Member] USD ($)	Sep. 30, 2012 Other Assets [Member] USD ($)	Jul. 02, 2011 MKS Inc [Member] USD ($)	Jun. 30, 2011 MKS Inc [Member] USD ($)	Jun. 30, 2011 MKS Inc [Member] CAD	Sep. 30, 2013 Other Current Assets [Member] USD ($)	Sep. 30, 2012 Other Current Assets [Member] USD ($)	Sep. 30, 2013 Other Current Liabilities [Member] USD ($)	Sep. 30, 2013 Standard & Poor's, BBB-1 Rating and Above-Tier 1 [Member] USD ($)	Sep. 30, 2012 Standard & Poor's, BBB-1 Rating and Above-Tier 1 [Member] USD ($)	Sep. 30, 2013 Internally Assigned Grade, Tier 2 [Member] USD ($)	Sep. 30, 2012 Internally Assigned Grade, Tier 2 [Member] USD ($)	Sep. 30, 2013 Internally Assigned Grade, Tier 3 [Member] USD ($)	Sep. 30, 2012 Internally Assigned Grade, Tier 3 [Member] USD ($)	Sep. 30, 2013 Minimum [Member] Purchased Software [Member]	Sep. 30, 2013 Minimum [Member] Customer Lists [Member]	Sep. 30, 2013 Minimum [Member] Trademarks And Trade Names [Member]	Sep. 30, 2013 Minimum [Member] Computer Hardware And Software [Member]	Sep. 30, 2013 Minimum [Member] Furniture And Fixtures [Member]	Sep. 30, 2013 Maximum [Member] Purchased Software [Member]	Sep. 30, 2013 Maximum [Member] Customer Lists [Member]	Sep. 30, 2013 Maximum [Member] Trademarks And Trade Names [Member]	Sep. 30, 2013 Maximum [Member] Computer Hardware And Software [Member]	Sep. 30, 2013 Maximum [Member] Furniture And Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Maximum payment terms on software purchases for credit-worthy customers (in months)	24
Billed but uncollected maintenance receivable							$ 108,600,000	$ 110,700,000
Major number of customers	0		0
Ceiling percentage of revenue for major customer	10.00%
Allowance for doubtful accounts receivable	3,000,000	3,400,000	3,900,000	4,600,000
Accounts receivable written-off, net of recoveries	600,000	800,000	800,000
Bad debt expense including general and administrative expense	213,000	258,000	51,000
Financing receivables	53,123,000	42,463,000													42,189,000	34,017,000	10,934,000	8,446,000	0	0
Financing receivables, current					36,100,000	29,500,000
Long-term accounts receivable from customers for contracts with extended payment terms							17,000,000	13,000,000
Financing receivables past due	0		0
Reserve for credit losses		0	0	0
Sale of finance receivable	17,000,000	14,300,000	4,100,000
Uncollectible financing receivables written-off		0	0	0
Fair value of our forward contracts	124,434,000	133,903,000										300,000	200,000	400,000
Net losses on foreign currency exposures	2,000,000	5,900,000	12,300,000						4,400,000
Net realized and unrealized (gain) loss on forward contracts (excluding the underlying foreign currency exposure being hedged)	3,400,000	3,600,000	4,100,000
Foreign currency forward contract										305,000,000	292,000,000
Development costs for software	0		0	0
Amortizable intangible assets	54,000,000	44,900,000
Amortization period, minimum (in years)																					3 years	4 years	3 years	3 years	3 years	10 years	12 years	7 years	5 years	8 years
Advertising expense	4,200,000	2,800,000	2,600,000
Cumulative translation adjustment gains (loss)		(400,000)	(7,600,000)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	74,357,000	96,438,000
Pension benefits net of tax		$ (50,800,000)	$ (64,900,000)