Acquisitions Acquisitions (Details) (i2 [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended
	Jan. 28, 2010 Y
Business Acquisition [Line Items]
Cash	$ 218,348
Trade accounts receivable	31,361
Other current assets	31,336
Property and equipment	3,115
Long-term deferred tax assets	198,771
Other non-current assets	6,323
Goodwill	97,329
Total assets acquired	699,783
Deferred revenue	(55,436)
Other current liabilities	(44,593)
Total liabilities assumed	(100,029)
Net assets acquired from i2 Technologies, Inc.	599,754
Customer Lists [Member]
Business Acquisition [Line Items]
Intangibles	74,600
Weighted Average Amortization Period (in years)	6
Technology-based [Member]
Business Acquisition [Line Items]
Intangibles	24,300
Useful Life (in years)	7
Weighted Average Amortization Period (in years)	7
Marketing-based [Member]
Business Acquisition [Line Items]
Intangibles	$ 14,300
Useful Life (in years)	5
Weighted Average Amortization Period (in years)	5
Minimum [Member] | Customer Lists [Member]
Business Acquisition [Line Items]
Useful Life (in years)	1
Maximum [Member] | Customer Lists [Member]
Business Acquisition [Line Items]
Useful Life (in years)	7