Business Segment Information (Schedule Of Total Revenue, Total Costs And Expenses, Segment Performance) (Details) (USD $)	3 Months Ended								12 Months Ended
	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2012		Jan. 31, 2011		Jan. 31, 2010
Segment Reporting Information [Line Items]
Revenue									$ 1,594,397,000		$ 1,623,427,000		$ 1,533,937,000
Intercompany revenue									0		0		0
Total revenue	405,455,000	453,078,000	386,367,000	349,497,000	430,837,000	425,460,000	410,242,000	356,888,000	1,594,397,000		1,623,427,000		1,533,937,000
Total costs and expenses									1,567,362,000		1,673,342,000		1,727,038,000
Income (loss) from operations	16,267,000	32,130,000	12,062,000	(33,424,000)	23,525,000	23,302,000	(13,050,000)	(83,692,000)	27,035,000		(49,915,000)		(193,101,000)
Stock-based compensation expense									37,033,000		57,398,000		57,665,000
Other Asset Impairment Charges									0		6,696,000		6,889,000
Restructuring charges									20,728,000		29,934,000		15,541,000
Interest expense									(33,332,000)		(30,813,000)		(25,381,000)
Depreciation and amortization									(88,082,000)		(88,592,000)		(101,189,000)
Other non-cash items									(2,601,000)	[1]	1,257,000	[2]	(9,780,000)	[3]
Comverse [Member]
Segment Reporting Information [Line Items]
Revenue									768,059,000		860,232,000		792,994,000
Intercompany revenue									3,098,000		2,604,000		1,793,000
Total revenue									771,157,000		862,836,000		794,787,000
Total costs and expenses									759,715,000		922,612,000		1,009,003,000
Income (loss) from operations									11,442,000		(59,776,000)		(214,216,000)
Comverse [Member] | Comverse Performance [Member]
Segment Reporting Information [Line Items]
Total revenue									771,157,000		862,836,000		794,787,000
Total costs and expenses									759,715,000		922,612,000		1,009,003,000
Stock-based compensation expense									3,660,000		2,439,000		4,170,000
Amortization of acquisition-related intangibles									17,308,000		18,505,000		21,958,000
Compliance-related professional fees									10,901,000		82,136,000		113,306,000
Compliance-related compensation and other expenses									6,719,000		4,542,000		10,737,000
Other Asset Impairment Charges									2,331,000				3,356,000
Impairment of Long-Lived Assets Held-for-use													(2,906,000)
Litigation settlements and related costs									804,000
Acquisition-related charges													(103,000)
Restructuring charges									20,728,000		29,934,000		15,272,000
Gain (Loss) on Sale of Properties											(2,371,000)
Other									(48,000)		(1,402,000)		831,000
Expense adjustments									62,403,000		133,783,000		172,433,000
Expenses after adjustments									697,312,000		788,829,000		836,570,000
Comverse performance									73,845,000		74,007,000		(41,783,000)
Interest expense									953,000		900,000		(314,000)
Depreciation and amortization									34,165,000		(38,705,000)		(50,637,000)
Other non-cash items									2,331,000	[2]	923,000	[2]	9,109,000	[3]
Comverse BSS [Member]
Segment Reporting Information [Line Items]
Revenue									365,008,000		340,502,000		349,089,000
Intercompany revenue									0		0		0
Total revenue									365,008,000		340,502,000		349,089,000
Total costs and expenses									287,913,000		284,148,000		304,924,000
Income (loss) from operations									77,095,000		56,354,000		44,165,000
Segment revenue adjustment									0		0		0
Stock-based compensation expense									0		0		0
Amortization of acquisition-related intangibles													18,672,000
Compliance-related professional fees									0		0		0
Compliance-related compensation and other expenses													2,879,000
Other Asset Impairment Charges													0
Impairment of Long-Lived Assets Held-for-use													0
Litigation settlements and related costs									0		0		0
Acquisition-related charges									0		0		54,000
Restructuring charges									0				0
Gain (Loss) on Sale of Properties											0
Other									0		0		0
Segment expense adjustments													21,605,000
Segment expenses									268,232,000		264,086,000		283,319,000
Segment performance									96,776,000		76,416,000		65,770,000
Comverse BSS [Member] | Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue									365,008,000		340,502,000		349,089,000
Comverse BSS [Member] | Comverse Performance [Member]
Segment Reporting Information [Line Items]
Total revenue									365,008,000		340,502,000		349,089,000
Total costs and expenses									287,913,000		284,148,000		304,924,000
Amortization of acquisition-related intangibles									17,308,000		18,505,000
Compliance-related compensation and other expenses									2,203,000		1,557,000
Strategic evaluation related costs									0		0		0
Other Asset Impairment Charges									170,000
Restructuring charges											0
Segment expense adjustments									19,681,000		20,062,000
Expense adjustments									19,681,000		20,062,000		21,605,000
Interest expense									0		0		0
Depreciation and amortization									(20,609,000)		(23,402,000)		(23,737,000)
Other non-cash items									(170,000)	[2]	0	[2]	0	[2]
Comverse VAS [Member]
Segment Reporting Information [Line Items]
Revenue									356,413,000		460,899,000		384,890,000
Intercompany revenue									0		0		75,000
Total revenue									356,413,000		460,899,000		384,965,000
Total costs and expenses									232,477,000		285,572,000		291,217,000
Income (loss) from operations									123,936,000		175,327,000		93,748,000
Segment revenue adjustment									0		0		0
Stock-based compensation expense									0		0		0
Amortization of acquisition-related intangibles											0		0
Compliance-related professional fees									0		0		0
Compliance-related compensation and other expenses													2,462,000
Other Asset Impairment Charges													0
Impairment of Long-Lived Assets Held-for-use													0
Litigation settlements and related costs									0		0		0
Acquisition-related charges									0		0		0
Restructuring charges									0				0
Gain (Loss) on Sale of Properties											0
Other									0		0		0
Segment expense adjustments													2,462,000
Segment expenses									230,450,000		285,242,000		288,755,000
Segment performance									125,963,000		175,657,000		96,210,000
Comverse VAS [Member] | Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue									356,413,000		460,899,000		384,965,000
Comverse VAS [Member] | Comverse Performance [Member]
Segment Reporting Information [Line Items]
Total revenue									356,413,000		460,899,000		384,965,000
Total costs and expenses									232,477,000		285,572,000		291,217,000
Amortization of acquisition-related intangibles									0
Compliance-related compensation and other expenses									1,789,000		330,000
Strategic evaluation related costs									0		0		0
Other Asset Impairment Charges									238,000
Restructuring charges											0
Segment expense adjustments									2,027,000		330,000
Expense adjustments									2,027,000		330,000		2,462,000
Interest expense									0		0		0
Depreciation and amortization									(4,707,000)		(5,505,000)		(10,058,000)
Other non-cash items									(238,000)	[2]	0	[2]	0	[2]
All Other Subsidiaries [Member]
Segment Reporting Information [Line Items]
Revenue									46,638,000		58,831,000		59,015,000
Intercompany revenue									3,098,000		2,604,000		1,718,000
Total revenue									49,736,000		61,435,000		60,733,000
Total costs and expenses									239,325,000		352,892,000		412,862,000
Income (loss) from operations									(189,589,000)		(291,457,000)		(352,129,000)
Stock-based compensation expense									3,660,000
Amortization of acquisition-related intangibles									0
Compliance-related professional fees									10,901,000
Compliance-related compensation and other expenses									2,727,000
Other Asset Impairment Charges									1,923,000
Litigation settlements and related costs									804,000
Restructuring charges									20,728,000
Other									(48,000)
All Other Subsidiaries [Member] | Comverse Performance [Member]
Segment Reporting Information [Line Items]
Total revenue									49,736,000		61,435,000		60,733,000
Total costs and expenses									239,325,000		352,892,000		412,862,000
Stock-based compensation expense											2,439,000		4,170,000
Amortization of acquisition-related intangibles											0		3,286,000
Compliance-related professional fees											82,136,000		113,306,000
Compliance-related compensation and other expenses											2,655,000		5,396,000
Other Asset Impairment Charges													3,356,000
Impairment of Long-Lived Assets Held-for-use													(2,906,000)
Acquisition-related charges													(157,000)
Restructuring charges											29,934,000		15,272,000
Gain (Loss) on Sale of Properties											(2,371,000)
Other											(1,402,000)		831,000
Expense adjustments									40,695,000		113,391,000		148,366,000
Interest expense									953,000		(900,000)		(314,000)
Depreciation and amortization									8,849,000		(9,798,000)		(16,842,000)
Other non-cash items									1,923,000	[2]	923,000	[2]	9,109,000	[3]
Verint [Member]
Segment Reporting Information [Line Items]
Revenue									782,648,000		726,799,000		703,633,000
Intercompany revenue									0		0		0
Total revenue									782,648,000		726,799,000		703,633,000
Total costs and expenses									696,170,000		653,694,000		637,954,000
Income (loss) from operations									86,478,000		73,105,000		65,679,000
Segment revenue adjustment									13,599,000		0		0
Stock-based compensation expense									27,910,000		46,819,000		44,237,000
Amortization of acquisition-related intangibles									35,302,000		30,554,000		30,289,000
Compliance-related professional fees									1,012,000		28,913,000		54,472,000
Compliance-related compensation and other expenses											0		0
Other Asset Impairment Charges									0				0
Impairment of Long-Lived Assets Held-for-use													0
Litigation settlements and related costs									0		0		0
Acquisition-related charges									9,061,000		1,690,000		762,000
Restructuring charges									0		0		141,000
Gain (Loss) on Sale of Properties											0
Other									3,190,000		3,505,000		39,000
Segment expense adjustments									76,475,000		111,481,000		129,940,000
Segment expenses									619,695,000		542,213,000		508,014,000
Segment performance									176,552,000		184,586,000		195,619,000
Interest expense									(32,358,000)		(29,896,000)		(24,964,000)
Depreciation and amortization									(53,040,000)		(48,951,000)		(49,290,000)
Other non-cash items									(270,000)	[1]	334,000	[1]	(159,000)	[1]
Verint [Member] | Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue									796,247,000		726,799,000		703,633,000
Verint [Member] | Comverse Performance [Member]
Segment Reporting Information [Line Items]
Total revenue									782,648,000		726,799,000		703,633,000
Total costs and expenses									696,170,000		653,694,000		637,954,000
Compliance-related compensation and other expenses									0
Strategic evaluation related costs									0		0		0
All Other [Member]
Segment Reporting Information [Line Items]
Revenue									90,328,000		95,227,000		96,325,000
Intercompany revenue									4,457,000		3,409,000		1,879,000
Total revenue									94,785,000		98,636,000		98,204,000
Total costs and expenses									355,350,000		454,570,000		497,835,000
Income (loss) from operations									(260,565,000)		(355,934,000)		(399,631,000)
Segment revenue adjustment									0		0		0
Stock-based compensation expense									9,123,000		10,579,000		13,428,000
Amortization of acquisition-related intangibles									0		0		3,286,000
Compliance-related professional fees									36,186,000		132,804,000		129,167,000
Compliance-related compensation and other expenses									2,727,000		2,700,000		5,396,000
Strategic evaluation related costs									11,144,000		3,065,000		236,000
Other Asset Impairment Charges									1,923,000				3,356,000
Impairment of Long-Lived Assets Held-for-use													(2,906,000)
Litigation settlements and related costs									5,772,000		(17,060,000)		2,771,000
Acquisition-related charges									0		0		(157,000)
Restructuring charges									20,728,000		29,934,000		15,400,000
Gain (Loss) on Sale of Properties											(2,371,000)
Other									(31,000)		(1,402,000)		2,590,000
Segment expense adjustments									87,572,000		158,249,000		178,379,000
Segment expenses									267,778,000		296,321,000		319,456,000
Segment performance									(172,993,000)		(197,685,000)		(221,252,000)
Interest expense									(974,000)		(917,000)		(417,000)
Depreciation and amortization									(9,726,000)		(10,734,000)		(18,104,000)
Other non-cash items									(1,923,000)	[1]	923,000	[1]	(9,621,000)	[1]
All Other [Member] | Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue									94,785,000		98,636,000		98,204,000
All Other [Member] | Comverse Performance [Member]
Segment Reporting Information [Line Items]
Total revenue									94,785,000		98,636,000		98,204,000
Total costs and expenses									355,350,000		454,570,000		497,835,000
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue									0		0		0
Intercompany revenue									(4,457,000)		(3,409,000)		(1,954,000)
Total revenue									(4,457,000)		(3,409,000)		(1,954,000)
Total costs and expenses									(4,548,000)		(4,642,000)		(4,892,000)
Income (loss) from operations									91,000		1,233,000		2,938,000
Interest expense									0		0		0
Depreciation and amortization									0		0		0
Other non-cash items									$ 0	[1]	$ 0	[2]	$ 0	[3]

[1] Other non-cash items consist of write-downs of property and equipment and capitalized software.

[2] Other non-cash items consist of write-downs of property and equipment.

[3] Other non-cash items consist of write-downs and impairments of intangible assets and property and equipment.