Consolidated Statements of Cash Flows (USD $) In Thousands	12 Months Ended
Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Cash flows from operating activities:
Net loss	$ (118,502)	$ (264,252)	$ (358,788)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Non-cash items	181,963	194,318	379,789
Changes in operating assets and liabilities, net of effects of business combinations:
Accounts receivable	(10,937)	812	35,457
Inventories	(2,941)	(7,715)	109
Deferred cost of revenue	43,977	14,147	16,672
Prepaid expenses and other current assets	5,403	(9,775)	(29,535)
Accounts payable and accrued expenses	(55,765)	(42,794)	(35,023)
Deferred revenue	(160,799)	(6,705)	63,817
Other assets and liabilities	2,357	28,376	(31,576)
Other, net	(7,676)	10	(5,593)
Net cash (used in) provided by operating activities-continuing operations	(122,920)	(93,578)	35,329
Net cash used in operating activities-discontinued operations	(4,362)	(7,142)	(5,644)
Net cash (used in) provided by operating activities	(127,282)	(100,720)	29,685
Cash flows from investing activities:
Proceeds from sales and maturities of investments	57,256	175,206	438,053
Purchases of investments			(470,557)
Proceeds from sale of Verint Systems, Inc. shares of common stock	76,475
Proceeds from sale of Ulticom, Inc., net of cash sold	2,627
Acquisition of businesses, net of cash acquired	(23,485)	(96)	(11,090)
Purchase of property and equipment	(20,342)	(23,444)	(34,425)
Capitalization of software development costs	(2,527)	(2,715)	(4,547)
Net change in restricted cash and bank time deposits	6,966	(58,774)	(24,754)
Proceeds from asset sales	27,345	60	51
Settlement of derivative financial instruments not designated as hedges	(33,506)	(19,075)	(10,041)
Other, net	(12)	(7)	(218)
Net cash provided by (used in) investing activities-continuing operations	90,797	71,155	(117,528)
Net cash provided by (used in) investing activities-discontinued operations	64,581	9,526	(70,462)
Net cash provided by (used in) investing activities	155,378	80,681	(187,990)
Cash flows from financing activities:
Debt issuance costs	(4,039)	(152)	(150)
Borrowings under lines of credit and revolving credit facility	12,000		15,000
Repurchase of convertible debt obligations		(417,282)
Repayment of bank loans, long-term debt and other financing obligations	(44,163)	(6,088)	(2,886)
Repurchase of common stock	(1,906)	(359)	(386)
Net proceeds (payments) from issuance (repurchase) of common stock by subsidiaries	36,641	(106)	30
Excess tax benefits from stock awards plans	815
Dividends paid to noncontrolling interest	(2,191)	(4,145)
Net cash (used in) provided by financing activities-continuing operations	(2,843)	(428,132)	11,608
Net cash used in financing activities-discontinued operations	(21,467)	(63,803)
Net cash (used in) provided by financing activities	(24,310)	(491,935)	11,608
Effects of exchange rates on cash and cash equivalents	2,732	7,919	(13,566)
Net increase (decrease) in cash and cash equivalents	6,518	(504,055)	(160,263)
Cash and cash equivalents, beginning of year including cash of discontinued operations	574,872	1,078,927	1,239,190
Cash and cash equivalents, end of year including cash of discontinued operations	581,390	574,872	1,078,927
Less: Cash and cash equivalents of discontinued operations at end of year		(13,190)	(206,771)
Cash and cash equivalents, end of year	$ 581,390	$ 561,682	$ 872,156

Cash And Cash Equivalents Including Cash Of Discontinued Operations

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Cash And Cash Equivalents Of Discontinued Operation

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Dividends paid to noncontrolling interest

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Proceeds From Sale Of Subsidiary

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Proceeds From Sale Of Subsidiary Shares Of Common Stock

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Transactions that do not result in cash inflows or outflows in the period in which they occur, but affect net income and thus are removed when calculating net cash flow from operating activities using the indirect cash flow method. This element is used when there is not a more specific and appropriate element.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.

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The net change between the beginning and ending balance of cash and cash equivalents.

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This element represents cash provided by (used in) the financing activities of the entity's discontinued operations during the period. This element should only be used by those entities that separately report cash flows attributable to discontinued operations. If using this element, it is an indication that the cash flows of the entity which are detailed in reconciling to cash provided by or used in financing activities reflect only cash flows attributable to continuing operations.

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This element represents cash provided by (used in) the investing activities of the entity's discontinued operations during the period. This element should only be used by those entities that separately report cash flows attributable to discontinued operations. If using this element, it is an indication that the cash flows of the entity which are detailed in reconciling to cash provided by or used in investing activities reflect only cash flows attributable to continuing operations.

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This element represents cash provided by (used in) the operating activities of the entity's discontinued operations during the period. This element should only be used by those entities that separately report cash flows attributable to discontinued operations. If using this element, it is an indication that the cash flows of the entity which are detailed in reconciling to cash provided by or used in operating activities reflect only cash flows attributable to continuing operations.

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The effect of exchange rate changes on cash balances held in foreign currencies.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from share-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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The net change during the reporting period in the aggregate amount of obligations and expenses incurred but not paid.

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- Definition

The net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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The net change during the reporting period in the value of expenditures made during the current reporting period for benefits that will be received over a period of years. Deferred charges differ from prepaid expenses in that they usually extend over a long period of time and may or may not be regularly recurring costs of operation.

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The net change during the reporting period, excluding the portion taken into income, in the liability reflecting services yet to be performed by the reporting entity for which cash or other forms of consideration was received or recorded as a receivable.

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The net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

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The net change during the reporting period of all current assets and liabilities used in operating activities.

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For entities with classified balance sheets, the net change during the reporting period in the value of other assets or liabilities used in operating activities, that are not otherwise defined in the taxonomy. For entities with unclassified balance sheets, the net change during the reporting period in the value of all other assets or liabilities used in operating activities.

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The net change during the reporting period in the value of this group of assets within the working capital section.

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The net cash inflow (outflow) for the net change associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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The net cash inflow (outflow) from financing activity for the period.

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The net cash from (used in) the entity's financing activities specifically EXCLUDING the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in financing activities. Such reporting would necessitate the entity to use the Net Cash Provided by (Used in) Discontinued Operations, Total element provided in the taxonomy.

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The net cash inflow (outflow) from investing activity.

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The net cash from (used in) the entity's investing activities specifically EXCLUDING the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in investing activities. Such reporting would necessitate the entity to use the Net Cash Provided by (Used in) Discontinued Operations, Total element provided in the taxonomy.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income.

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The net cash from (used in) the entity's continuing operations. This element specifically EXCLUDES the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in operating activities.

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- Definition

The net cash outflow (inflow) associated with derivative instruments, such as swaps, forwards, options, and so forth, excluding those designated as hedges.

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The net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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- Definition

The cash outflow to reacquire common stock during the period.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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-Publisher FASB
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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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- Definition

The cash outflow associated with the development or modification of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization.

+ References

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- Definition

The cash inflow from the additional capital contribution to the entity.

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- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).

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Period Type:	duration

- Definition

The cash inflow associated with the sale and maturity (principal being due) of other investments, prepayment and call (request of early payment) of other investments not otherwise defined in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 18

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15, 16

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 31

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

+ Details

Name:	us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 5
-Subparagraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow from the repayment of debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

+ References

+ Details

Name:	us-gaap_RepaymentsOfConvertibleDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration