Segment Information (Revenue And Operating Income) (Details) (USD $)	3 Months Ended	12 Months Ended
	Jan. 01, 2011	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2011
Revenue		$ 1,293,541,000	$ 1,255,679,000		$ 1,166,949,000
Operating income		127,324,000	128,096,000		117,114,000
Sales and marketing expenses		378,771,000	(392,956,000)	[1]	(353,051,000)	[1]
General and administrative expenses		136,999,000	(119,085,000)	[1]	(110,291,000)	[1]
Other income (expense), net		(1,090,000)	(7,360,000)		(12,566,000)
Income before income taxes		126,234,000	120,736,000		104,548,000
Restructuring charges		52,197,000	24,928,000		0
Depreciation and amortization		76,551,000	66,471,000		62,394,000
Software Products [Member]
Revenue		977,523,000	935,472,000		875,511,000
Operating income		605,963,000	598,344,000	[1]	557,879,000	[1]
Restructuring charges		17,700,000	4,100,000
Depreciation and amortization		27,300,000	25,400,000		24,800,000
Services [Member]
Revenue		316,018,000	320,207,000		291,438,000
Operating income		37,131,000	41,793,000	[1],[2]	22,577,000	[1],[2]
Restructuring charges		11,300,000	4,000,000
Depreciation and amortization		5,000,000	3,600,000		3,800,000
Expected cost exceeding revenue in automotive contract	5,000,000
Estimated loss on automotive contract	5,000,000
Reduction of service margin percentage	2.00%
Restructuring Charges [Member]
Restructuring charges		(251,000)
General And Administrative [Member]
Restructuring charges		5,100,000	1,600,000
Sales And Marketing [Member]
Restructuring charges		$ 18,100,000	$ 15,200,000

[1] We recorded restructuring charges of $24.9 million in 2012. Software Products included $4.1 million; Services included $4.0 million; sales and marketing expenses included $15.2 million; and general and administrative expenses included $1.6 million of the total restructuring charges recorded in 2012.

[2] In the first quarter of 2011, we made a strategic decision to enter into a contract with a customer in the automotive industry, for which we expected our costs to exceed our revenue by approximately $5 million. Services segment operating income in 2011 included immediate recognition of the approximately $5 million estimated loss on this contract and resulted in a reduction of service margins by approximately 2%.