Ca (CA) 10-Q 25 Oct 13 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Sep. 30, 2013	Oct. 18, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	CA, INC.
Entity Central Index Key	356028
Document Type	10-Q
Document Period End Date	30-Sep-13
Amendment Flag	FALSE
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	-28
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		451,274,478

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Millions, unless otherwise specified
Current assets
Cash and cash equivalents	$2,790	$2,593
Short-term investments	9	183
Trade accounts receivable, net	588	856
Deferred income taxes	358	346
Other current assets	166	148
Total current assets	3,911	4,126
Property and equipment, net of accumulated depreciation of $826 and $786, respectively	306	311
Goodwill	5,920	5,871
Capitalized software and other intangible assets, net	1,214	1,231
Deferred income taxes	76	77
Other noncurrent assets, net	168	195
Total assets	11,595	11,811
Current liabilities
Current portion of long-term debt	11	16
Accounts payable	80	93
Accrued salaries, wages and commissions	232	304
Accrued expenses and other current liabilities	381	406
Deferred revenue (billed or collected)	2,038	2,482
Taxes payable, other than income taxes payable	43	77
Federal, state and foreign income taxes payable	58	151
Deferred income taxes	12	12
Total current liabilities	2,855	3,541
Long-term debt, net of current portion	1,768	1,274
Federal, state and foreign income taxes payable	175	338
Deferred income taxes	122	120
Deferred revenue (billed or collected)	856	975
Other noncurrent liabilities	144	113
Total liabilities	5,920	6,361
Stockholders' equity
Preferred stock, no par value, 10,000,000 shares authorized; No shares issued and outstanding	0	0
Common stock, $0.10 par value, 1,100,000,000 shares authorized; 589,695,081 and 589,695,081 shares issued; 446,646,793 and 448,149,131 shares outstanding, respectively	59	59
Additional paid-in capital	3,566	3,593
Retained earnings	5,704	5,357
Accumulated other comprehensive loss	-175	-155
Treasury stock, at cost, 143,048,288 and 141,545,950 shares, respectively	-3,479	-3,404
Total stockholders' equity	5,675	5,450
Total liabilities and stockholders' equity	$11,595	$11,811

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Millions, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Accumulated depreciation	$826	$786
Preferred stock, No par value	$0	$0
Preferred stock, Shares authorized	10,000,000	10,000,000
Preferred stock, Shares issued	0	0
Preferred stock, Shares outstanding	0	0
Common stock, Par value	$0.10	$0.10
Common stock, Shares authorized	1,100,000,000	1,100,000,000
Common stock, Shares issued	589,695,081	589,695,081
Common stock, Shares outstanding	446,646,793	448,149,131
Treasury stock, Shares	143,048,288	141,545,950

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue
Subscription and maintenance	$945	$963	$1,889	$1,940
Professional services	97	95	195	186
Software fees and other	98	94	184	171
Total revenue	1,140	1,152	2,268	2,297
Expenses
Costs of licensing and maintenance	73	69	144	138
Cost of professional services	88	88	176	174
Amortization of capitalized software costs	73	67	142	131
Selling and marketing	260	317	541	622
General and administrative	91	98	182	208
Product development and enhancements	145	123	280	248
Depreciation and amortization of other intangible assets	37	40	73	81
Other (gains) expenses, net	14	13	143	-23
Total expenses before interest and income taxes	781	815	1,681	1,579
Income before interest and income taxes	359	337	587	718
Interest expense, net	13	10	24	21
Income before income taxes	346	327	563	697
Income tax expense (benefit)	106	105	-12	235
Net income	$240	$222	$575	$462
Basic income per common share
Basic income per common share	$0.53	$0.48	$1.27	$0.99
Basic weighted average shares used in computation	448	458	449	462
Diluted income per common share
Diluted income per common share	$0.53	$0.48	$1.26	$0.99
Diluted weighted average shares used in computation	450	459	450	463

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$240	$222	$575	$462
Other comprehensive (loss) income
Foreign currency translation adjustments	23	16	-20	-10
Total other comprehensive (loss) income	23	16	-20	-10
Comprehensive income	$263	$238	$555	$452

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating activities
Net income	$575	$462
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	215	212
Deferred income taxes	-59	-2
Provision for bad debts	5	3
Share-based compensation expense	41	44
Asset impairments and other non-cash items	4	3
Foreign currency transaction losses	2	19
Changes in other operating assets and liabilities, net of effect of acquisitions
Decrease in trade accounts receivable	259	306
Decrease in deferred revenue	-580	-677
(Decrease) increase in taxes payable, net	-270	17
Increase in accounts payable, accrued expenses and other	12	11
Decrease in accrued salaries, wages and commissions	-71	-113
Changes in other operating assets and liabilities	-35	-13
Net cash provided by operating activities	98	272
Investing activities
Acquisitions of businesses, net of cash acquired, and purchased software	-125	-12
Purchases of property and equipment	-35	-32
Capitalized software development costs	-35	-78
Purchases of short-term investments	-9	-154
Maturities of short-term investments	184	0
Other investing activities	0	2
Net cash used in investing activities	-20	-274
Financing activities
Dividends paid	-228	-235
Purchases of common stock	-200	-344
Notional pooling borrowings	1,609	513
Notional pooling repayments	-1,639	-481
Debt borrowings	498	0
Debt repayments	-8	-6
Debt issuance costs	-4	0
Exercise of common stock options and other	55	22
Net cash provided by (used in) financing activities	83	-531
Effect of exchange rate changes on cash	36	-60
Increase (decrease) in cash and cash equivalents	197	-593
Cash and cash equivalents at beginning of period	2,593	2,679
Cash and cash equivalents at end of period	$2,790	$2,086

Accounting_Policies

Accounting Policies	6 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ACCOUNTING POLICIES	NOTE A – ACCOUNTING POLICIES
	Basis of Presentation: The accompanying unaudited Condensed Consolidated Financial Statements of CA, Inc. (Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP), as defined in Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 270, for interim financial information and with the instructions to Rule 10-01 of Securities and Exchange Commission Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. For further information, refer to the Company’s Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2013 (2013 Form 10-K).
	In the opinion of management, all adjustments considered necessary for a fair presentation have been included. All such adjustments are of a normal, recurring nature.
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Although these estimates are based on management’s knowledge of current events and actions it may undertake in the future, these estimates may ultimately differ from actual results.
	Operating results for the three and six months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2014.
	Cash and Cash Equivalents: The Company’s cash and cash equivalents are held in numerous locations throughout the world, with approximately 59% being held by the Company’s foreign subsidiaries outside the United States at September 30, 2013.
	Investments: Short-term investments consisted of time deposits held by foreign subsidiaries that are denominated in currencies other than the U.S. dollar. These investments have maturities greater than three months, but less than one year.
	Fair Value Measurements: Fair value is the price that would be received for an asset or the amount paid to transfer a liability in an orderly transaction between market participants. The Company is required to classify certain assets and liabilities based on the following fair value hierarchy:
	•	Level 1: Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities;
	•	Level 2: Quoted prices for identical assets and liabilities in markets that are not active, or quoted prices for similar assets and liabilities in active markets or financial instruments for which significant inputs are observable, either directly or indirectly; and
	•	Level 3: Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.
	See Note I, “Fair Value Measurements,” for additional information.
	Deferred Revenue (Billed or Collected): The Company accounts for unearned revenue on billed amounts due from customers on a gross basis. Unearned revenue on billed installments (collected or uncollected) is reported as deferred revenue in the liability section of the Company’s Condensed Consolidated Balance Sheets. Deferred revenue (billed or collected) excludes unbilled contractual commitments executed under license and maintenance agreements that will be billed in future periods. See Note F, “Deferred Revenue,” for additional information.
	Other Matters: As part of the Company’s efforts to more fully utilize its intellectual property assets, in the first quarter of fiscal 2013, the Company closed a transaction that assigned the rights to certain of these assets to a large technology company for approximately $35 million. The entire contract amount is included in the “Other (gains) expenses, net” line of the Company’s Condensed Consolidated Statement of Operations for the six months ended September 30, 2012. The Company will continue to have the ability to use these intellectual property assets in current and future product offerings.
	New Accounting Pronouncements: In February 2013, the FASB issued Accounting Standards Update No. 2013-02, Comprehensive Income (Topic 220) —Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02), requiring an entity to present information about reclassification adjustments from accumulated other comprehensive income in their financial statements or footnotes. The Company adopted ASU 2013-02 in the first quarter of fiscal year 2014 and the current and prior periods have been presented in accordance with ASU 2013-02.

Acquisitions

Acquisitions	6 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]
ACQUISITIONS	NOTE B – ACQUISITIONS
	In June 2013, the Company acquired 100% of the voting equity interest of Layer 7 Technologies (Layer 7), a provider of application programming interface (API) management and security software. The acquisition of Layer 7 will enable the Company to provide security and management technology to the API marketplace that complements its current identity and access management software suite. The total purchase price of the Layer 7 acquisition was approximately $155 million.
	The pro forma effects of the Company’s first quarter fiscal year 2014 acquisition of Layer 7 on the Company’s revenues and results of operations during fiscal year 2013 were considered immaterial. The preliminary purchase price allocation is as follows:
	(dollars in millions)	Layer 7			Estimated
					Useful Life
	Finite-lived intangible assets (1)	$	12		5 years
	Purchased software	99			5 years
	Goodwill	54			Indefinite
	Deferred tax liabilities	(14		)	—
	Other assets net of other liabilities assumed (2)	4			—
	Purchase price	$	155
	-1	Includes customer relationships and trade names.
	-2	Includes approximately $9 million of cash acquired.
	Transaction costs for the acquisition were immaterial. The excess purchase price over the estimated value of the net tangible and identifiable intangible assets was recorded to goodwill. The preliminary allocation of a significant portion of the purchase price to goodwill was predominantly due to synergies the Company expects from marketing and integration of the Layer 7 products with other products of the Company and intangible assets that are not separable, such as assembled workforce and going concern. The goodwill relating to the Company’s acquisition of Layer 7 is not deductible for tax purposes and was allocated to the Enterprise Solutions segment. The allocation of purchase price to acquired identifiable assets, including intangible assets, is preliminary because the Company has not completed its fair value analysis and review of historical tax records of Layer 7.
	The Company had approximately $34 million and $14 million of accrued acquisition-related costs at September 30, 2013 and March 31, 2013, respectively, related to purchase price amounts withheld to support indemnification obligations by the sellers.

Severance_and_Exit_Costs

Severance and Exit Costs	6 Months Ended
	Sep. 30, 2013
Restructuring and Related Activities [Abstract]
SEVERANCE AND EXIT COSTS	NOTE C – SEVERANCE AND EXIT COSTS
	Fiscal year 2014 re-balancing plan: The fiscal year 2014 re-balancing plan (Fiscal 2014 Plan) was announced in May 2013 and will consist of a termination of more than 1,200 employees and consolidations of several facilities. The reduction in the number of employees is expected to be temporary as the Company intends to hire additional personnel with skills that will enable the Company to better focus its resources on key products and market segments. The total amount incurred for severance and facility exit costs under the Fiscal 2014 Plan for the first six months of fiscal year 2014 was approximately $103 million and $19 million, respectively, and is presented in "Other (gains) expenses, net" in the Company's Condensed Consolidated Statement of Operations. The Company expects total costs of the Fiscal 2014 Plan to be approximately $150 million (including severance costs of approximately $130 million and global facility consolidation costs of approximately $20 million). Actions under the Fiscal 2014 Plan are expected to be substantially completed by the end of fiscal year 2014.
	Accrued severance and exit costs and changes in the accruals during the six months ended September 30, 2013 and 2012 were as follows:
	(in millions)	Accrued		Expense		Change in			Payments			Accretion			Accrued
		Balance at				Estimate						and Other			Balance at
		31-Mar-13													30-Sep-13
	Severance charges	$	16	$	111	$	(9	)	$	(69	)	$	3		$	52
	Facility exit charges	23		19		—			(6		)	(3		)	33
	Total accrued liabilities	$	39												$	85
	(in millions)	Accrued		Expense		Change in			Payments			Accretion			Accrued
		Balance at				Estimate						and Other			Balance at
		31-Mar-12													30-Sep-12
	Severance charges	$	13	$	—	$	(3	)	$	(7	)	$	—		$	3
	Facility exit charges	40		—		—			(5		)	(3		)	32
	Total accrued liabilities	$	53												$	35
	Balances at September 30, 2013 and 2012 include severance accruals of approximately $7 million and $3 million, respectively, and facility exit accruals of approximately $15 million and $32 million, respectively, for plans and actions prior to fiscal year 2014.
	The severance liability is included in “Accrued salaries, wages and commissions” in the Condensed Consolidated Balance Sheets. The facility exit liabilities are included in “Accrued expenses and other current liabilities” and “Other noncurrent liabilities” in the Condensed Consolidated Balance Sheets.
	Accretion and other includes accretion of the Company’s lease obligations related to facility exits as well as changes in the assumptions related to future sublease income. These costs are included in “General and administrative” expense in the Condensed Consolidated Statements of Operations.

Trade_Accounts_Receivable

Trade Accounts Receivable	6 Months Ended
	Sep. 30, 2013
Receivables [Abstract]
TRADE ACCOUNTS RECEIVABLE	NOTE D – TRADE ACCOUNTS RECEIVABLE
	Trade accounts receivable, net represents amounts due from the Company’s customers and is presented net of allowances. These balances include revenue recognized in advance of customer billings but do not include unbilled contractual commitments executed under license agreements. The components of “Trade accounts receivable, net” were as follows:
		September 30,			March 31,
		2013			2013
		(in millions)
	Accounts receivable – billed	$	523		$	796
	Accounts receivable – unbilled	67			63
	Other receivables	19			21
	Less: Allowances	(21		)	(24		)
	Trade accounts receivable, net	$	588		$	856

Goodwill_Capitalized_Software_

Goodwill, Capitalized Software and Other Intangible Assets	6 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL, CAPITALIZED SOFTWARE AND OTHER INTANGIBLE ASSETS	NOTE E – GOODWILL, CAPITALIZED SOFTWARE AND OTHER INTANGIBLE ASSETS
	The gross carrying amounts and accumulated amortization for capitalized software and other intangible assets at September 30, 2013 were as follows:
		At September 30, 2013
		Gross		Less: Fully			Remaining		Accumulated			Net
		Amortizable		Amortized			Amortizable		Amortization			Assets
		Assets		Assets			Assets		on Remaining
									Amortizable
									Assets
		(in millions)
	Purchased software products	$	5,703	$	4,779		$	924	$	323		$	601
	Internally developed software products	1,559		675			884		396			488
	Other intangible assets	832		480			352		227			125
	Total capitalized software and other intangible assets	$	8,094	$	5,934		$	2,160	$	946		$	1,214
	The gross carrying amounts and accumulated amortization for capitalized software and other intangible assets at March 31, 2013 were as follows:
		At March 31, 2013
		Gross		Less: Fully			Remaining		Accumulated			Net
		Amortizable		Amortized			Amortizable		Amortization			Assets
		Assets		Assets			Assets		on Remaining
									Amortizable
									Assets
		(in millions)
	Purchased software products	$	5,597	$	4,735		$	862	$	309		$	553
	Internally developed software products	1,528		661			867		327			540
	Other intangible assets	816		429			387		249			138
	Total capitalized software and other intangible assets	$	7,941	$	5,825		$	2,116	$	885		$	1,231
	Based on the capitalized software and other intangible assets recorded through September 30, 2013, the projected annual amortization expense for fiscal year 2014 and the next four fiscal years is expected to be as follows:
		Year Ended March 31,
		2014		2015			2016		2017			2018
		(in millions)
	Purchased software products	$	118	$	111		$	109	$	107		$	104
	Internally developed software products	166		150			120		86			40
	Other intangible assets	54		46			28		11			7
	Total	$	338	$	307		$	257	$	204		$	151
	The Company evaluates the useful lives and recoverability of capitalized software and other intangible assets when events or changes in circumstances indicate that an impairment may exist. These evaluations require complex assumptions about key factors such as future customer demand, technology trends and the impact of those factors on the technology the Company acquires and develops for its products. Impairments or revisions to useful lives could result from the use of alternative assumptions that reflect reasonably possible outcomes related to future customer demand or technology trends for assets within the Enterprise Solutions segment.
	Goodwill activity by segment for the six months ended September 30, 2013 was as follows:
	(in millions)	Mainframe Solutions		Enterprise Solutions			Services		Total
	Balance at March 31, 2013	$	4,178	$	1,612		$	81	$	5,871
	Revision to preliminary purchase price allocation of prior year acquisition	—		(6		)	—		(6		)
	Balance at March 31, 2013 as revised	$	4,178	$	1,606		$	81	$	5,865
	Acquisitions	—		54			—		54
	Foreign currency translation adjustment	—		1			—		1
	Balance at September 30, 2013	$	4,178	$	1,661		$	81	$	5,920

Deferred_Revenue

Deferred Revenue	6 Months Ended
	Sep. 30, 2013
Deferred Revenue Disclosure [Abstract]
DEFERRED REVENUE	NOTE F – DEFERRED REVENUE
	The current and noncurrent components of “Deferred revenue (billed or collected)” at September 30, 2013 and March 31, 2013 were as follows:
		September 30,		March 31,
		2013		2013
		(in millions)
	Current:
	Subscription and maintenance	$	1,882	$	2,307
	Professional services	136		154
	Software fees and other	20		21
	Total deferred revenue (billed or collected) – current	$	2,038	$	2,482
	Noncurrent:
	Subscription and maintenance	$	824	$	940
	Professional services	30		33
	Software fees and other	2		2
	Total deferred revenue (billed or collected) – noncurrent	$	856	$	975
	Total deferred revenue (billed or collected)	$	2,894	$	3,457

Debt

Debt	6 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
DEBT	NOTE G – DEBT
	Senior Notes: In August 2013, the Company issued $250 million of 2.875% Senior Notes due August 2018 (2.875% Notes) and $250 million of 4.500% Senior Notes due August 2023 (4.500% Notes), for proceeds of approximately $498 million, reflecting a discount of approximately $2 million. The 2.875% Notes and 4.500% Notes are senior unsecured obligations that rank equally in right of payment with all of our existing and future unsecured and unsubordinated obligations and are redeemable by the Company at any time, subject to a “make-whole” premium of 25 basis points and 30 basis points for the 2.875% Notes and 4.500% Notes, respectively. Interest on the 2.875% Notes and 4.500% Notes is payable semiannually in August and February, beginning February 2014. The 2.875% Notes and 4.500% Notes contain customary covenants and events of default. The maturity of the 2.875% Notes and the 4.500% Notes may be accelerated by holders upon certain events of default, including failure to make payments when due and failure to comply with covenants.
	The Company capitalized finance costs of approximately $4 million associated with the 2.875% Notes and 4.500% Notes and will amortize these costs to “Interest expense, net” in the Company's Consolidated Statements of Operations.
	Revolving Credit Facility: In June 2013, the Company amended its revolving credit facility to extend the termination date to June 2018.
	The maximum committed amount available under the revolving credit facility due June 2018 is $1 billion. The facility also provides the Company with an option to increase the available credit by an amount up to $500 million. This option is subject to certain conditions and the agreement of the facility lenders.
	Advances under the revolving credit facility due June 2018 bear interest at a rate dependent on the Company's credit ratings at the time of those borrowings and are calculated according to a Base Rate or a Eurocurrency Rate, as the case may be, plus an applicable margin. The Company must also pay facility commitment fees quarterly on the full revolving credit commitment at rates dependent on the Company's credit ratings.
	At September 30, 2013 and March 31, 2013, there were no outstanding borrowings under the revolving credit facility and, based on the Company's credit ratings, the rates applicable to the facility at September 30, 2013 and March 31, 2013 were as follows:
		September 30, 2013		March 31, 2013
	Applicable margin on Base Rate borrowing	0.125	%	0.25	%
	Weighted average interest rate on outstanding borrowings	—	%	—	%
	Applicable margin on Eurocurrency Rate borrowing	1	%	1.1	%
	Facility commitment fee	0.125	%	0.15	%
	The interest rate that would have applied at September 30, 2013 to a borrowing under the revolving credit facility due June 2018 would have been 3.38% for Base Rate borrowings and 1.18% for Eurocurrency Rate borrowings. The Company capitalized the transaction fees of approximately $1 million associated with the extension of the revolving credit facility due June 2018. These fees are being amortized to “Interest expense, net” in the Condensed Consolidated Statements of Operations.
	There was no borrowing activity under the revolving credit facility for the six months ended September 30, 2013. The revolving credit facility due June 2018 contains customary covenants for borrowings of this type, including two financial covenants: (i) for the 12 months ending each quarter-end, the ratio of consolidated debt for borrowed money to consolidated cash flow, each as defined in the revolving credit facility agreement, must not exceed 4.00 to 1.00; and (ii) for the 12 months ending at any date, the ratio of consolidated cash flow to the sum of interest payable on, and amortization of debt discount in respect of, all consolidated debt for borrowed money, as defined in the credit agreement, must not be less than 3.50 to 1.00. At September 30, 2013, the Company was in compliance with all covenants.
	In addition, future borrowings under the revolving credit facility require, at the date of a borrowing, that (i) no event of default shall have occurred and be continuing and (ii) the Company reaffirm the representations and warranties it made in the credit agreement.

Derivatives

Derivatives	6 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	NOTE H – DERIVATIVES
	The Company is exposed to financial market risks arising from changes in interest rates and foreign exchange rates. Changes in interest rates could affect the Company’s monetary assets and liabilities, and foreign exchange rate changes could affect the Company’s foreign currency denominated monetary assets and liabilities and forecasted transactions. The Company enters into derivative contracts with the intent of mitigating a portion of these risks.
	Interest Rate Swaps: The Company has interest rate swaps with a total notional value of $500 million, which swap a total of $500 million of its 6.125% Senior Notes due December 2014 into floating interest rate debt through December 1, 2014. These swaps are designated as fair value hedges.
	At September 30, 2013, the fair value of these derivatives was an asset of approximately $14 million, of which approximately $12 million is included in “Other current assets” and approximately $2 million is included in “Other noncurrent assets, net” in the Company’s Condensed Consolidated Balance Sheet.
	At March 31, 2013, the fair value of these derivatives was an asset of approximately $19 million, of which approximately $11 million is included in “Other current assets” and approximately $8 million is included in “Other noncurrent assets, net” in the Company’s Condensed Consolidated Balance Sheet.
	Foreign Currency Contracts: The Company enters into foreign currency option and forward contracts to manage foreign currency risks. The Company has not designated its foreign exchange derivatives as hedges. Accordingly, changes in fair value from these contracts are recorded as “Other (gains) expenses, net” in the Company’s Condensed Consolidated Statements of Operations.
	At September 30, 2013, foreign currency contracts outstanding consisted of purchase and sales contracts with a total gross notional value of approximately $746 million, and durations of less than six months. The net fair value of these contracts at September 30, 2013 was a net asset of approximately $2 million, of which approximately $9 million is included in “Other current assets” and approximately $7 million is included in “Accrued expenses and other current liabilities” in the Company’s Condensed Consolidated Balance Sheet.
	At March 31, 2013, foreign currency contracts outstanding consisted of purchase and sales contracts with a total notional value of approximately $597 million and durations of less than one month. The net fair value of these contracts at March 31, 2013 was a net asset of approximately $1 million, of which approximately $1 million is included in “Other current assets” in the Company’s Condensed Consolidated Balance Sheet.
	A summary of the effect of the interest rate and foreign exchange derivatives on the Company’s Condensed Consolidated Statements of Operations was as follows:
		Amount of Net (Gain)/Loss Recognized in the Condensed Consolidated Statements of Operations
		Three Months Ended						Six Months Ended
		September 30,						September 30,
	(in millions)	2013			2012			2013			2012
	Interest expense, net – interest rate swaps designated as fair value hedges	$	(3	)	$	(3	)	$	(6	)	$	(6	)
	Other (gains) expenses, net – foreign currency contracts	$	(6	)	$	2		$	(15	)	$	10
	The Company is subject to collateral security arrangements with most of its major counterparties. These arrangements require the Company or the counterparty to post collateral when the derivative fair values exceed contractually established thresholds. The aggregate fair values of all derivative instruments under these collateralized arrangements were in a net asset position at September 30, 2013 and March 31, 2013. The Company posted no collateral at September 30, 2013 or March 31, 2013. Under these agreements, if the Company’s credit ratings had been downgraded one rating level, the Company would still not have been required to post collateral.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	NOTE I – FAIR VALUE MEASUREMENTS
	The following table presents the Company’s assets and liabilities that were measured at fair value on a recurring basis at September 30, 2013 and March 31, 2013:
		At September 30, 2013							At March 31, 2013
		Fair Value				Estimated			Fair Value				Estimated
		Measurement Using				Fair			Measurement Using				Fair
		Input Types				Value			Input Types				Value
	(in millions)	Level 1		Level 2		Total			Level 1		Level 2		Total
	Assets:
	Money market funds	$	1,003	$	—	$	1,003	(1)	$	1,280	$	—	$	1,280	(2)
	Foreign exchange derivatives (3)	—		9		9			—		1		1
	Interest rate derivatives (3)	—		14		14			—		19		19
	Total assets	$	1,003	$	23	$	1,026		$	1,280	$	20	$	1,300
	Liabilities:
	Foreign exchange derivatives (3)	$	—	$	7	$	7		$	—	$	—	$	—
	Total liabilities	$	—	$	7	$	7		$	—	$	—	$	—
	-1	At September 30, 2013, the Company had approximately $953 million and $50 million of investments in money market funds classified as “Cash and cash equivalents” and “Other noncurrent assets, net” for restricted cash amounts, respectively, in its Condensed Consolidated Balance Sheet.
	-2	At March 31, 2013, the Company had approximately $1,230 million and $50 million of investments in money market funds classified as “Cash and cash equivalents” and “Other noncurrent assets, net” for restricted cash amounts, respectively, in its Condensed Consolidated Balance Sheet.
	-3	See Note H, “Derivatives” for additional information. Interest rate derivatives fair value excludes accrued interest.
	At September 30, 2013 and March 31, 2013, the Company did not have any assets or liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).
	The carrying values of financial instruments classified as current assets and current liabilities, such as cash and cash equivalents, short-term investments, accounts payable, accrued expenses, and short-term borrowings, approximate fair value due to the short-term maturity of the instruments.
	The following table presents the carrying amounts and estimated fair values of the Company’s other financial instruments that were not measured at fair value on a recurring basis at September 30, 2013 and March 31, 2013:
		At September 30, 2013				At March 31, 2013
	(in millions)	Carrying		Estimated		Carrying			Estimated
		Value		Fair Value		Value			Fair Value
	Liabilities:
	Total debt (1)	$	1,779	$	1,892	$	1,290		$	1,413
	Facility exit reserve (2)	$	32	$	35	$	23		$	27
	-1	Estimated fair value of total debt is based on quoted prices for similar liabilities for which significant inputs are observable except for certain long-term lease obligations, for which fair value approximates carrying value (Level 2).
	-2	Estimated fair value for the facility exit reserve is determined using the Company’s incremental borrowing rate at September 30, 2013 and March 31, 2013. At September 30, 2013 and March 31, 2013, the facility exit reserve included approximately $10 million and $6 million, respectively, in “Accrued expenses and other current liabilities” and approximately $22 million and $17 million, respectively, in “Other noncurrent liabilities” in the Company’s Condensed Consolidated Balance Sheets (Level 3).

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	NOTE J – COMMITMENTS AND CONTINGENCIES
	The Company, various subsidiaries, and certain current and former officers have been or, from time to time, may be named as defendants in various lawsuits and claims arising in the normal course of business. The Company may also become involved with contract issues and disputes with customers, including government customers. The Company believes that it has meritorious defenses in connection with these lawsuits, claims and disputes, and intends to vigorously contest each of them.
	Based on the Company's experience, management believes that the damages amounts claimed in a case are not a meaningful indicator of the potential liability. Claims, suits, investigations and proceedings are inherently uncertain and it is not possible to predict the ultimate outcome of cases.
	In the opinion of the Company's management based upon information currently available to the Company, while the outcome of these lawsuits and claims is uncertain, the likely results of these lawsuits and claims against the Company are not expected, either individually or in the aggregate, to have a material adverse effect on the Company's financial position, results of operations or cash flows, although the effect could be material to the Company's results of operations or cash flows for any interim reporting period. For some of these matters, the Company is unable to estimate a range of reasonably possible loss due to the stage of the matter and/or other particular circumstances of the matter. For others, a range of reasonably possible loss can be estimated. For those matters for which such a range can be estimated, the Company estimates that, in the aggregate, the range of reasonably possible loss is from zero to $25 million. This is in addition to amounts, if any, that have been accrued for those matters.
	The Company is obligated to indemnify its officers and directors under certain circumstances to the fullest extent permitted by Delaware law. As a part of that obligation, the Company has advanced and will continue to advance certain attorneys' fees and expenses incurred by officers and directors in various lawsuits and investigations, as required under Delaware law.

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Sep. 30, 2013
Equity [Abstract]
STOCKHOLDERS' EQUITY	NOTE K – STOCKHOLDERS’ EQUITY
	Stock Repurchases: During the six months ended September 30, 2013, the Company repurchased approximately 7 million shares of its common stock for approximately $198 million. At September 30, 2013, the Company remained authorized to purchase approximately $307 million of its common stock under its current stock repurchase program.
	Accumulated Other Comprehensive Loss: Foreign currency translation losses included in "Accumulated other comprehensive loss" in the Company’s Condensed Consolidated Balance Sheets at September 30, 2013 and March 31, 2013 were approximately $175 million and $155 million, respectively.
	Cash Dividends: The Company’s Board of Directors declared the following dividends during the six months ended September 30, 2013 and 2012:
	Six Months Ended September 30, 2013:
	(in millions, except per share amounts)
	Declaration Date	Dividend Per Share	Record Date	Total Amount	Payment Date
	May 9, 2013	$0.25	May 23, 2013	$114	June 11, 2013
	1-Aug-13	$0.25	22-Aug-13	$114	10-Sep-13
	Six Months Ended September 30, 2012:
	(in millions, except per share amounts)
	Declaration Date	Dividend Per Share	Record Date	Total Amount	Payment Date
	May 8, 2012	$0.25	May 22, 2012	$119	June 12, 2012
	2-Aug-12	$0.25	14-Aug-12	$116	11-Sep-12

Income_Per_Common_Share

Income Per Common Share	6 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
INCOME PER COMMON SHARE	NOTE L – INCOME PER COMMON SHARE
	Basic net income per common share excludes dilution and is calculated by dividing net income allocable to common shares by the weighted average number of common shares outstanding for the period. Diluted net income per common share is calculated by dividing net income allocable to common shares by the weighted average number of common shares, as adjusted for the potential dilutive effect of non-participating share-based awards.
	The following table presents basic and diluted income per common share information for the three and six months ended September 30, 2013 and 2012:
		Three Months Ended						Six Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
		(in millions, except per share amounts)
	Basic income per common share:
	Net income	$	240		$	222		$	575		$	462
	Less: Net income allocable to participating securities	(2		)	(2		)	(6		)	(5		)
	Net income allocable to common shares	$	238		$	220		$	569		$	457
	Weighted average common shares outstanding	448			458			449			462
	Basic income per common share	$	0.53		$	0.48		$	1.27		$	0.99
	Diluted income per common share:
	Net income	$	240		$	222		$	575		$	462
	Less: Net income allocable to participating securities	(2		)	(2		)	(6		)	(5		)
	Net income allocable to common shares	$	238		$	220		$	569		$	457
	Weighted average shares outstanding and common share equivalents:
	Weighted average common shares outstanding	448			458			449			462
	Weighted average effect of share-based payment awards	2			1			1			1
	Denominator in calculation of diluted income per share	450			459			450			463
	Diluted income per common share	$	0.53		$	0.48		$	1.26		$	0.99
	For the three months ended September 30, 2013 and 2012, respectively, approximately 2 million and 4 million shares of Company common stock underlying restricted stock awards and options to purchase common stock were excluded from the calculation because their effect on income per share was anti-dilutive during the respective periods. Weighted average restricted stock awards of approximately 5 million and 5 million for the three months ended September 30, 2013 and 2012, respectively, were considered participating securities in the calculation of net income allocable to common stockholders.
	For the six months ended September 30, 2013 and 2012, respectively, approximately 2 million and 3 million shares of Company common stock underlying restricted stock awards and options to purchase common stock were excluded from the calculation because their effect on income per share was anti-dilutive during the respective periods. Weighted average restricted stock awards of approximately 5 million and 6 million for the six months ended September 30, 2013 and 2012, respectively, were considered participating securities in the calculation of net income allocable to common stockholders.

Accounting_for_ShareBased_Comp

Accounting for Share-Based Compensation	6 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
ACCOUNTING FOR SHARE-BASED COMPENSATION	NOTE M – ACCOUNTING FOR SHARE-BASED COMPENSATION
	The Company recognized share-based compensation in the following line items in the Condensed Consolidated Statements of Operations for the periods indicated:
		Three Months Ended								Six Months Ended
		September 30,								September 30,
		2013				2012				2013			2012
		(in millions)
	Costs of licensing and maintenance	$	1			$	1			$	2		$	1
	Cost of professional services	1				1				2			2
	Selling and marketing	8				8				15			18
	General and administrative	6				7				12			15
	Product development and enhancements	5				4				10			8
	Share-based compensation expense before tax	$	21			$	21			$	41		$	44
	Income tax benefit	(6		)		(8		)		(13		)	(16		)
	Net share-based compensation expense	$	15			$	13			$	28		$	28
	The following table summarizes information about unrecognized share-based compensation costs at September 30, 2013:
		Unrecognized Share-Based Compensation Costs				Weighted Average Period Expected to be Recognized
		(in millions)				(in years)
	Stock option awards	$	10			2.4
	Restricted stock units	24				2.2
	Restricted stock awards	75				2.1
	Performance share units	22				2.8
	Total unrecognized share-based compensation costs	$	131			2.3
	There were no capitalized share-based compensation costs for the three and six months ended September 30, 2013 and 2012.
	The value of performance share unit (PSU) awards is determined using the closing price of the Company’s common stock on the last trading day of the quarter until the PSUs are granted. Compensation costs for the PSUs are amortized over the requisite service periods based on the expected level of achievement of the performance targets. At the conclusion of the performance periods for the PSUs, the applicable number of shares of restricted stock awards (RSAs), restricted stock units (RSUs) or unrestricted shares granted may vary based upon the level of achievement of the performance targets and the approval of the Company’s Compensation and Human Resources Committee (which may reduce any award for any reason in its discretion).
	For the six months ended September 30, 2013 and 2012, the Company issued options for approximately 1.6 million shares and 0.7 million shares, respectively. The weighted average fair values and assumptions used for the options granted were as follows:
		Six Months Ended
		September 30,
		2013			2012
	Weighted average fair value	5.19			4.84
	Dividend yield	4.05	%		3.96	%
	Expected volatility factor (1)	30	%		34	%
	Risk-free interest rate (2)	1.5	%		0.8	%
	Expected life (in years) (3)	6			4.5
	-1	Expected volatility is measured using historical daily price changes of the Company’s stock over the respective expected term of the options and the implied volatility derived from the market prices of the Company’s traded options.
	-2	The risk-free rate for periods within the contractual term of the stock options is based on the U.S. Treasury yield curve in effect at the time of grant.
	-3	The expected life is the number of years the Company estimates that options will be outstanding prior to exercise. The Company’s computation of expected life was determined based on the simplified method (the average of the vesting period and option term).
	The shares under the 1-year PSU awards for the fiscal year 2013 and 2012 incentive plan years under the Company's long-term incentive plans were granted in the first six months of fiscal years 2014 and 2013, respectively. The awards vest 34% on the date of grant and 33% on the first and second anniversaries of the grant date. The table below summarizes the RSAs and RSUs granted under these PSUs:
				RSAs				RSUs
	Incentive Plans for Fiscal Years	Performance Period		Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
				(in millions)				(in millions)
	2013	1 year		0.4		$27.11		0.1		$26.12
	2012	1 year		1.2		$26.39		0.2		$25.40
	The shares under the 3-year PSUs for the fiscal year 2010 incentive plan year under the Company's long-term incentive plans were granted in the first six months of fiscal year 2013. Unrestricted shares of common stock were issued in settlement immediately upon grant as follows:
	Incentive Plans	Performance		Unrestricted Shares		Weighted Average
	for Fiscal Years	Period		(in millions)		Grant Date Fair Value
	2010	3 years		0.2		$26.39
	Share-based awards were granted under the Company's fiscal year 2013 and 2012 Sales Retention Equity Programs in the first six months of fiscal years 2014 and 2013, respectively. These awards vest on the third anniversary of the grant date. The table below summarizes the RSAs and RSUs granted under these programs:
				RSAs				RSUs
	Incentive Plans for Fiscal Years	Performance Period		Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
				(in millions)				(in millions)
	2013	1 year		0.2		$27.11		0.1		$24.13
	2012	1 year		0.2		$26.39		0.1		$23.41
	The table below summarizes all of the RSAs and RSUs, including grants made pursuant to the long-term incentive plans discussed above, granted during the three and six months ended September 30, 2013 and 2012:
		Three Months Ended								Six Months Ended
		September 30,								September 30,
		2013				2012				2013			2012
		(shares in millions)
	RSAs
	Shares	—			(1)	—			(1)	2.7			3.6
	Weighted average grant date fair value (2)	$	30.39			$	25.54			$	27.01		$	26.23
	RSUs
	Shares	—			(1)	—			(1)	0.8			0.7
	Weighted average grant date fair value (3)	$	30.13			$	23.63			$	25.37		$	24.29
	-1	Less than 0.1 million.
-2	The fair value is based on the quoted market value of the Company's common stock on the grant date.
-3	The fair value is based on the quoted market value of the Company's common stock on the grant date reduced by the present value of dividends expected to be paid on the Company's common stock prior to vesting of the RSUs, which is calculated using a risk-free interest rate.
Employee Stock Purchase Plan: The Company maintains the 2012 Employee Stock Purchase Plan (ESPP) for all eligible employees. The ESPP offer period is semi-annual and allows participants to purchase the Company’s common stock at 95% of the closing price of the stock on the last day of the offer period. The ESPP is non-compensatory. For the six-month offer period ended June 30, 2013, the Company issued approximately 0.1 million shares under the ESPP at an average price of $27.19 per share. As of September 30, 2013, approximately 29.7 million shares are available for future issuances under the ESPP.

Income_Taxes

Income Taxes	6 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]
INCOME TAXES	NOTE N – INCOME TAXES
	Income tax expense for the three months ended September 30, 2013 was approximately $106 million and income tax benefit for the six months ended September 30, 2013 was approximately $12 million, compared with income tax expense for the three and six months ended September 30, 2012 of approximately $105 million and $235 million, respectively. For the six months ended September 30, 2013, the Company recognized a net discrete tax benefit of approximately $179 million resulting primarily from the resolutions of uncertain tax positions upon the completion of the examination of the Company's U.S. federal income tax returns for the tax years ended March 31, 2005, 2006 and 2007.
	The Company’s estimated annual effective tax rate, which excludes the impact of discrete items, for the six months ended September 30, 2013 and 2012 was 29.7% and 33.0%, respectively. Legislative changes in tax laws, the outcome of tax audits and any other changes in potential tax liabilities may result in additional tax expense or benefit in fiscal year 2014, which are not considered in the Company's estimated annual effective tax rate. While the Company does not currently view any such items as individually material to the results of the Company's consolidated financial position or results of operations, the impact of certain items may yield additional tax expense or benefit in the remaining quarters of fiscal year 2014 and the Company is anticipating a fiscal year 2014 effective tax rate of approximately 14%, which includes the impact of the aforementioned completion of the examination.
	The completion of the examination of the Company's U.S. federal income tax returns for the tax years ended March 31, 2005, 2006 and 2007 resulted in a reduction of approximately $221 million in the Company's uncertain tax positions as disclosed in Note 15, “Income Taxes” of the Company's Form 10-K for the year ended March 31, 2013. The Company received a cash refund of approximately $70 million upon the completion of this examination.

Supplemental_Statement_of_Cash

Supplemental Statement of Cash Flows Information	6 Months Ended
	Sep. 30, 2013
Supplemental Statement of Cash Flows Information [Abstract]
SUPPLEMENTAL STATEMENT OF CASH FLOWS INFORMATION	NOTE O – SUPPLEMENTAL STATEMENT OF CASH FLOWS INFORMATION
	For the six months ended September 30, 2013 and 2012, interest payments, net were approximately $31 million and $31 million, respectively, and income taxes paid, net were approximately $255 million and $150 million, respectively. For the six months ended September 30, 2013 and 2012, the excess tax benefits from options exercised included in financing activities were approximately $3 million and $5 million, respectively.
	Non-cash financing activities for the six months ended September 30, 2013 and 2012 consisted of treasury shares issued in connection with the following: share-based incentive awards granted under the Company’s equity compensation plans of approximately $46 million (net of approximately $27 million of taxes withheld) and $62 million (net of approximately $34 million of taxes withheld), respectively; and discretionary stock contributions to the CA, Inc. Savings Harvest Plan of approximately $28 million and $29 million, respectively.
	The Company uses a notional pooling arrangement with an international bank to help manage global liquidity requirements. Under this pooling arrangement, the Company and its participating subsidiaries may maintain either cash deposit or borrowing positions through local currency accounts with the bank, so long as the aggregate position of the global pool is a notionally calculated net cash deposit. Because it maintains a security interest in the cash deposits and has the right to offset the cash deposits against the borrowings, the bank provides the Company and its participating subsidiaries favorable interest terms on both. The activity under this cash pooling arrangement for the six months ended September 30, 2013 and 2012 was as follows:
		Six Months Ended
		September 30,
		2013			2012
		(in millions)
	Total borrowing position outstanding at beginning of period (1)	$	136		$	139
	Borrowings	1,609			513
	Repayments	(1,639		)	(481		)
	Foreign currency exchange effect	20			(7		)
	Total borrowing position outstanding at end of period (1)	$	126		$	164
	-1	Included in “Accrued expenses and other current liabilities” in the Company’s Condensed Consolidated Balance Sheets.

Segment_Information

Segment Information	6 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
SEGMENT INFORMATION	NOTE P – SEGMENT INFORMATION
	The Company’s Mainframe Solutions and Enterprise Solutions operating segments comprise its software business organized by the nature of the Company’s software offerings and the platform on which the products operate. The Services operating segment comprises implementation, consulting, education and training services, including those directly related to the Mainframe Solutions and Enterprise Solutions software that the Company sells to its customers.
	Segment expenses do not include share-based compensation expense; amortization of purchased software; amortization of other intangible assets; certain foreign exchange derivative hedging gains and losses; costs associated with our Fiscal 2014 Plan; and other miscellaneous costs. Additionally, starting in the first quarter of fiscal year 2014, the measure of segment expenses and segment profit was revised by the Chief Operating Decision Maker, who is the Company's Chief Executive Officer, to treat all costs of internal software development as segment expense in the period the costs are incurred and as a result, the Company will add back capitalized internal software costs and exclude amortization of internally developed software costs previously capitalized from segment expenses. Prior periods segment expense and profit information has been revised to present segment profit and expense on consistent basis. A measure of segment assets is not currently provided to the Company’s Chief Executive Officer and has therefore not been disclosed.
	As part of the Company’s efforts to more fully utilize its intellectual property assets, in the first quarter of fiscal year 2013, the Company closed a transaction that assigned the rights to certain of these assets to a large technology company for approximately $35 million. The entire contract amount is included in the Enterprise Solutions segment for the six months ended September 30, 2012. The Company will continue to have the ability to use these intellectual property assets in current and future product offerings.
	The Company’s segment information for the three and six months ended September 30, 2013 and 2012 was as follows:
	Three Months Ended September 30, 2013		Mainframe				Enterprise				Services				Total
	(dollars in millions)		Solutions				Solutions
	Revenue		$	624			$	419			$	97			$	1,140
	Expenses		228				357				88				673
	Segment profit		$	396			$	62			$	9			$	467
	Segment operating margin		63		%		15		%		9		%		41		%
	Depreciation		$	13			$	9			$	—			$	22
	Reconciliation of segment profit to income before income taxes for the three months ended September 30, 2013:
	(in millions)
	Segment profit	$	467
	Less:
	Purchased software amortization	31
	Other intangibles amortization	15
	Software development costs capitalized	(8		)
	Internally developed software products amortization	42
	Share-based compensation expense	21
	Other (gains) expenses, net (1)	7
	Interest expense, net	13
	Income before income taxes	$	346
	-1	Other (gains) expenses, net consists of approximately $2 million of costs associated with the Fiscal 2014 Plan, certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
	Six Months Ended September 30, 2013		Mainframe				Enterprise				Services				Total
	(dollars in millions)		Solutions				Solutions
	Revenue		$	1,243			$	830			$	195			$	2,268
	Expenses		470				727				178				1,375
	Segment profit		$	773			$	103			$	17			$	893
	Segment operating margin		62		%		12		%		9		%		39		%
	Depreciation		$	26			$	18			$	—			$	44
	Reconciliation of segment profit to income before income taxes for the six months ended September 30, 2013:
	(in millions)
	Segment profit	$	893
	Less:
	Purchased software amortization	59
	Other intangibles amortization	29
	Software development costs capitalized	(31		)
	Internally developed software products amortization	83
	Share-based compensation expense	41
	Other (gains) expenses, net (1)	125
	Interest expense, net	24
	Income before income taxes	$	563
	-1	Other (gains) expenses, net consists of approximately $122 million of costs associated with the Fiscal 2014 Plan, certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
	Three Months Ended September 30, 2012		Mainframe				Enterprise				Services				Total
	(dollars in millions)		Solutions				Solutions
	Revenue		$	619			$	438			$	95			$	1,152
	Expenses		250				409				89				748
	Segment profit		$	369			$	29			$	6			$	404
	Segment operating margin		60		%		7		%		6		%		35		%
	Depreciation		$	16			$	11			$	—			$	27
	Reconciliation of segment profit to income before income taxes for the three months ended September 30, 2012:
	(in millions)
	Segment profit	$	404
	Less:
	Purchased software amortization	27
	Other intangibles amortization	13
	Software development costs capitalized	(42		)
	Internally developed software products amortization	40
	Share-based compensation expense	21
	Other (gains) expenses, net (1)	8
	Interest expense, net	10
	Income before income taxes	$	327
-1	Other (gains) expenses, net consists of certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
Six Months Ended September 30, 2012		Mainframe				Enterprise				Services				Total
(dollars in millions)		Solutions				Solutions
Revenue		$	1,247			$	864			$	186			$	2,297
Expenses		511				766				176				1,453
Segment profit		$	736			$	98			$	10			$	844
Segment operating margin		59		%		11		%		5		%		37		%
Depreciation		$	32			$	22			$	—			$	54
Reconciliation of segment profit to income before income taxes for the six months ended September 30, 2012:
(in millions)
Segment profit	$	844
Less:
Purchased software amortization	54
Other intangibles amortization	27
Software development costs capitalized	(78		)
Internally developed software products amortization	77
Share-based compensation expense	44
Other (gains) expenses, net (1)	2
Interest expense, net	21
Income before income taxes	$	697
-1	Other (gains) expenses, net consists of certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
The table below summarizes the Company’s revenue from the United States and from international (i.e., non-U.S.) locations:
	Three Months Ended								Six Months Ended
	September 30,								September 30,
	2013				2012				2013				2012
	(in millions)
United States	$	687			$	685			$	1,360			$	1,368
Europe	267				266				531				538
Other	186				201				377				391
Total revenue	$	1,140			$	1,152			$	2,268			$	2,297

Accounting_Policies_Policies

Accounting Policies (Policies)	6 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation: The accompanying unaudited Condensed Consolidated Financial Statements of CA, Inc. (Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP), as defined in Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 270, for interim financial information and with the instructions to Rule 10-01 of Securities and Exchange Commission Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. For further information, refer to the Company’s Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2013 (2013 Form 10-K).
	In the opinion of management, all adjustments considered necessary for a fair presentation have been included. All such adjustments are of a normal, recurring nature.
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Although these estimates are based on management’s knowledge of current events and actions it may undertake in the future, these estimates may ultimately differ from actual results.
	Operating results for the three and six months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2014.
Cash and Cash Equivalents	Cash and Cash Equivalents: The Company’s cash and cash equivalents are held in numerous locations throughout the world, with approximately 59% being held by the Company’s foreign subsidiaries outside the United States at September 30, 2013.
Investments	Investments: Short-term investments consisted of time deposits held by foreign subsidiaries that are denominated in currencies other than the U.S. dollar. These investments have maturities greater than three months, but less than one year.
Fair Value Measurements	Fair Value Measurements: Fair value is the price that would be received for an asset or the amount paid to transfer a liability in an orderly transaction between market participants. The Company is required to classify certain assets and liabilities based on the following fair value hierarchy:
	•	Level 1: Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities;
	•	Level 2: Quoted prices for identical assets and liabilities in markets that are not active, or quoted prices for similar assets and liabilities in active markets or financial instruments for which significant inputs are observable, either directly or indirectly; and
	•	Level 3: Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.
	See Note I, “Fair Value Measurements,” for additional information.
Deferred Revenue (Billed or Collected)	Deferred Revenue (Billed or Collected): The Company accounts for unearned revenue on billed amounts due from customers on a gross basis. Unearned revenue on billed installments (collected or uncollected) is reported as deferred revenue in the liability section of the Company’s Condensed Consolidated Balance Sheets. Deferred revenue (billed or collected) excludes unbilled contractual commitments executed under license and maintenance agreements that will be billed in future periods. See Note F, “Deferred Revenue,” for additional information.
Other Matters	Other Matters: As part of the Company’s efforts to more fully utilize its intellectual property assets, in the first quarter of fiscal 2013, the Company closed a transaction that assigned the rights to certain of these assets to a large technology company for approximately $35 million. The entire contract amount is included in the “Other (gains) expenses, net” line of the Company’s Condensed Consolidated Statement of Operations for the six months ended September 30, 2012. The Company will continue to have the ability to use these intellectual property assets in current and future product offerings.
New Accounting Pronouncements	New Accounting Pronouncements: In February 2013, the FASB issued Accounting Standards Update No. 2013-02, Comprehensive Income (Topic 220) —Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02), requiring an entity to present information about reclassification adjustments from accumulated other comprehensive income in their financial statements or footnotes. The Company adopted ASU 2013-02 in the first quarter of fiscal year 2014 and the current and prior periods have been presented in accordance with ASU 2013-02.

Acquisitions_Tables

Acquisitions (Tables)	6 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]
Allocation of purchase price and estimated useful lives by acquisition	The preliminary purchase price allocation is as follows:
	(dollars in millions)	Layer 7			Estimated
					Useful Life
	Finite-lived intangible assets (1)	$	12		5 years
	Purchased software	99			5 years
	Goodwill	54			Indefinite
	Deferred tax liabilities	(14		)	—
	Other assets net of other liabilities assumed (2)	4			—
	Purchase price	$	155
	-1	Includes customer relationships and trade names.
	-2	Includes approximately $9 million of cash acquired.

Severance_and_Exit_Costs_Table

Severance and Exit Costs (Tables)	6 Months Ended
	Sep. 30, 2013
Restructuring and Related Activities [Abstract]
Severance and exit costs activity	Accrued severance and exit costs and changes in the accruals during the six months ended September 30, 2013 and 2012 were as follows:
	(in millions)	Accrued		Expense		Change in			Payments			Accretion			Accrued
		Balance at				Estimate						and Other			Balance at
		31-Mar-13													30-Sep-13
	Severance charges	$	16	$	111	$	(9	)	$	(69	)	$	3		$	52
	Facility exit charges	23		19		—			(6		)	(3		)	33
	Total accrued liabilities	$	39												$	85
	(in millions)	Accrued		Expense		Change in			Payments			Accretion			Accrued
		Balance at				Estimate						and Other			Balance at
		31-Mar-12													30-Sep-12
	Severance charges	$	13	$	—	$	(3	)	$	(7	)	$	—		$	3
	Facility exit charges	40		—		—			(5		)	(3		)	32
	Total accrued liabilities	$	53												$	35

Trade_Accounts_Receivable_Tabl

Trade Accounts Receivable (Tables)	6 Months Ended
	Sep. 30, 2013
Receivables [Abstract]
Components of trade accounts receivable, net	The components of “Trade accounts receivable, net” were as follows:
		September 30,			March 31,
		2013			2013
		(in millions)
	Accounts receivable – billed	$	523		$	796
	Accounts receivable – unbilled	67			63
	Other receivables	19			21
	Less: Allowances	(21		)	(24		)
	Trade accounts receivable, net	$	588		$	856

Goodwill_Capitalized_Software_1

Goodwill, Capitalized Software and Other Intangible Assets (Tables)	6 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Capitalized software and other intangible assets	The gross carrying amounts and accumulated amortization for capitalized software and other intangible assets at September 30, 2013 were as follows:
		At September 30, 2013
		Gross		Less: Fully			Remaining		Accumulated			Net
		Amortizable		Amortized			Amortizable		Amortization			Assets
		Assets		Assets			Assets		on Remaining
									Amortizable
									Assets
		(in millions)
	Purchased software products	$	5,703	$	4,779		$	924	$	323		$	601
	Internally developed software products	1,559		675			884		396			488
	Other intangible assets	832		480			352		227			125
	Total capitalized software and other intangible assets	$	8,094	$	5,934		$	2,160	$	946		$	1,214
	The gross carrying amounts and accumulated amortization for capitalized software and other intangible assets at March 31, 2013 were as follows:
		At March 31, 2013
		Gross		Less: Fully			Remaining		Accumulated			Net
		Amortizable		Amortized			Amortizable		Amortization			Assets
		Assets		Assets			Assets		on Remaining
									Amortizable
									Assets
		(in millions)
	Purchased software products	$	5,597	$	4,735		$	862	$	309		$	553
	Internally developed software products	1,528		661			867		327			540
	Other intangible assets	816		429			387		249			138
	Total capitalized software and other intangible assets	$	7,941	$	5,825		$	2,116	$	885		$	1,231
Projected annual amortization expense for current fiscal year and next four fiscal years	Based on the capitalized software and other intangible assets recorded through September 30, 2013, the projected annual amortization expense for fiscal year 2014 and the next four fiscal years is expected to be as follows:
		Year Ended March 31,
		2014		2015			2016		2017			2018
		(in millions)
	Purchased software products	$	118	$	111		$	109	$	107		$	104
	Internally developed software products	166		150			120		86			40
	Other intangible assets	54		46			28		11			7
	Total	$	338	$	307		$	257	$	204		$	151
Goodwill activity by segment	Goodwill activity by segment for the six months ended September 30, 2013 was as follows:
	(in millions)	Mainframe Solutions		Enterprise Solutions			Services		Total
	Balance at March 31, 2013	$	4,178	$	1,612		$	81	$	5,871
	Revision to preliminary purchase price allocation of prior year acquisition	—		(6		)	—		(6		)
	Balance at March 31, 2013 as revised	$	4,178	$	1,606		$	81	$	5,865
	Acquisitions	—		54			—		54
	Foreign currency translation adjustment	—		1			—		1
	Balance at September 30, 2013	$	4,178	$	1,661		$	81	$	5,920

Deferred_Revenue_Tables

Deferred Revenue (Tables)	6 Months Ended
	Sep. 30, 2013
Deferred Revenue Disclosure [Abstract]
Components of deferred revenue (billed or collected)	The current and noncurrent components of “Deferred revenue (billed or collected)” at September 30, 2013 and March 31, 2013 were as follows:
		September 30,		March 31,
		2013		2013
		(in millions)
	Current:
	Subscription and maintenance	$	1,882	$	2,307
	Professional services	136		154
	Software fees and other	20		21
	Total deferred revenue (billed or collected) – current	$	2,038	$	2,482
	Noncurrent:
	Subscription and maintenance	$	824	$	940
	Professional services	30		33
	Software fees and other	2		2
	Total deferred revenue (billed or collected) – noncurrent	$	856	$	975
	Total deferred revenue (billed or collected)	$	2,894	$	3,457

Debt_Tables

Debt (Tables)	6 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Rates applicable to revolving credit facility	At September 30, 2013 and March 31, 2013, there were no outstanding borrowings under the revolving credit facility and, based on the Company's credit ratings, the rates applicable to the facility at September 30, 2013 and March 31, 2013 were as follows:
		September 30, 2013		March 31, 2013
	Applicable margin on Base Rate borrowing	0.125	%	0.25	%
	Weighted average interest rate on outstanding borrowings	—	%	—	%
	Applicable margin on Eurocurrency Rate borrowing	1	%	1.1	%
	Facility commitment fee	0.125	%	0.15	%

Derivatives_Tables

Derivatives (Tables)	6 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Effect of interest rate and foreign exchange derivatives on Condensed Consolidated Statements of Operations	A summary of the effect of the interest rate and foreign exchange derivatives on the Company’s Condensed Consolidated Statements of Operations was as follows:
		Amount of Net (Gain)/Loss Recognized in the Condensed Consolidated Statements of Operations
		Three Months Ended						Six Months Ended
		September 30,						September 30,
	(in millions)	2013			2012			2013			2012
	Interest expense, net – interest rate swaps designated as fair value hedges	$	(3	)	$	(3	)	$	(6	)	$	(6	)
	Other (gains) expenses, net – foreign currency contracts	$	(6	)	$	2		$	(15	)	$	10

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on a recurring basis	The following table presents the Company’s assets and liabilities that were measured at fair value on a recurring basis at September 30, 2013 and March 31, 2013:
		At September 30, 2013							At March 31, 2013
		Fair Value				Estimated			Fair Value				Estimated
		Measurement Using				Fair			Measurement Using				Fair
		Input Types				Value			Input Types				Value
	(in millions)	Level 1		Level 2		Total			Level 1		Level 2		Total
	Assets:
	Money market funds	$	1,003	$	—	$	1,003	(1)	$	1,280	$	—	$	1,280	(2)
	Foreign exchange derivatives (3)	—		9		9			—		1		1
	Interest rate derivatives (3)	—		14		14			—		19		19
	Total assets	$	1,003	$	23	$	1,026		$	1,280	$	20	$	1,300
	Liabilities:
	Foreign exchange derivatives (3)	$	—	$	7	$	7		$	—	$	—	$	—
	Total liabilities	$	—	$	7	$	7		$	—	$	—	$	—
	-1	At September 30, 2013, the Company had approximately $953 million and $50 million of investments in money market funds classified as “Cash and cash equivalents” and “Other noncurrent assets, net” for restricted cash amounts, respectively, in its Condensed Consolidated Balance Sheet.
	-2	At March 31, 2013, the Company had approximately $1,230 million and $50 million of investments in money market funds classified as “Cash and cash equivalents” and “Other noncurrent assets, net” for restricted cash amounts, respectively, in its Condensed Consolidated Balance Sheet.
	-3	See Note H, “Derivatives” for additional information. Interest rate derivatives fair value excludes accrued interest.
Carrying amounts and estimated fair values of other instruments not measured at fair value on a recurring basis	The following table presents the carrying amounts and estimated fair values of the Company’s other financial instruments that were not measured at fair value on a recurring basis at September 30, 2013 and March 31, 2013:
		At September 30, 2013				At March 31, 2013
	(in millions)	Carrying		Estimated		Carrying			Estimated
		Value		Fair Value		Value			Fair Value
	Liabilities:
	Total debt (1)	$	1,779	$	1,892	$	1,290		$	1,413
	Facility exit reserve (2)	$	32	$	35	$	23		$	27
	-1	Estimated fair value of total debt is based on quoted prices for similar liabilities for which significant inputs are observable except for certain long-term lease obligations, for which fair value approximates carrying value (Level 2).
	-2	Estimated fair value for the facility exit reserve is determined using the Company’s incremental borrowing rate at September 30, 2013 and March 31, 2013. At September 30, 2013 and March 31, 2013, the facility exit reserve included approximately $10 million and $6 million, respectively, in “Accrued expenses and other current liabilities” and approximately $22 million and $17 million, respectively, in “Other noncurrent liabilities” in the Company’s Condensed Consolidated Balance Sheets (Level 3).

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	6 Months Ended
	Sep. 30, 2013
Equity [Abstract]
Cash dividends	Cash Dividends: The Company’s Board of Directors declared the following dividends during the six months ended September 30, 2013 and 2012:
	Six Months Ended September 30, 2013:
	(in millions, except per share amounts)
	Declaration Date	Dividend Per Share	Record Date	Total Amount	Payment Date
	May 9, 2013	$0.25	May 23, 2013	$114	June 11, 2013
	1-Aug-13	$0.25	22-Aug-13	$114	10-Sep-13
	Six Months Ended September 30, 2012:
	(in millions, except per share amounts)
	Declaration Date	Dividend Per Share	Record Date	Total Amount	Payment Date
	May 8, 2012	$0.25	May 22, 2012	$119	June 12, 2012
	2-Aug-12	$0.25	14-Aug-12	$116	11-Sep-12

Income_Per_Common_Share_Tables

Income Per Common Share (Tables)	6 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Reconciliation of basic and diluted income per common share	The following table presents basic and diluted income per common share information for the three and six months ended September 30, 2013 and 2012:
		Three Months Ended						Six Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
		(in millions, except per share amounts)
	Basic income per common share:
	Net income	$	240		$	222		$	575		$	462
	Less: Net income allocable to participating securities	(2		)	(2		)	(6		)	(5		)
	Net income allocable to common shares	$	238		$	220		$	569		$	457
	Weighted average common shares outstanding	448			458			449			462
	Basic income per common share	$	0.53		$	0.48		$	1.27		$	0.99
	Diluted income per common share:
	Net income	$	240		$	222		$	575		$	462
	Less: Net income allocable to participating securities	(2		)	(2		)	(6		)	(5		)
	Net income allocable to common shares	$	238		$	220		$	569		$	457
	Weighted average shares outstanding and common share equivalents:
	Weighted average common shares outstanding	448			458			449			462
	Weighted average effect of share-based payment awards	2			1			1			1
	Denominator in calculation of diluted income per share	450			459			450			463
	Diluted income per common share	$	0.53		$	0.48		$	1.26		$	0.99

Accounting_for_ShareBased_Comp1

Accounting for Share-Based Compensation (Tables)	6 Months Ended
	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Recognized share-based compensation	The Company recognized share-based compensation in the following line items in the Condensed Consolidated Statements of Operations for the periods indicated:
		Three Months Ended								Six Months Ended
		September 30,								September 30,
		2013				2012				2013			2012
		(in millions)
	Costs of licensing and maintenance	$	1			$	1			$	2		$	1
	Cost of professional services	1				1				2			2
	Selling and marketing	8				8				15			18
	General and administrative	6				7				12			15
	Product development and enhancements	5				4				10			8
	Share-based compensation expense before tax	$	21			$	21			$	41		$	44
	Income tax benefit	(6		)		(8		)		(13		)	(16		)
	Net share-based compensation expense	$	15			$	13			$	28		$	28
Unrecognized share-based compensation costs	The following table summarizes information about unrecognized share-based compensation costs at September 30, 2013:
		Unrecognized Share-Based Compensation Costs				Weighted Average Period Expected to be Recognized
		(in millions)				(in years)
	Stock option awards	$	10			2.4
	Restricted stock units	24				2.2
	Restricted stock awards	75				2.1
	Performance share units	22				2.8
	Total unrecognized share-based compensation costs	$	131			2.3
Weighted average fair values and assumptions used for options granted	The weighted average fair values and assumptions used for the options granted were as follows:
		Six Months Ended
		September 30,
		2013			2012
	Weighted average fair value	5.19			4.84
	Dividend yield	4.05	%		3.96	%
	Expected volatility factor (1)	30	%		34	%
	Risk-free interest rate (2)	1.5	%		0.8	%
	Expected life (in years) (3)	6			4.5
	-1	Expected volatility is measured using historical daily price changes of the Company’s stock over the respective expected term of the options and the implied volatility derived from the market prices of the Company’s traded options.
	-2	The risk-free rate for periods within the contractual term of the stock options is based on the U.S. Treasury yield curve in effect at the time of grant.
	-3	The expected life is the number of years the Company estimates that options will be outstanding prior to exercise. The Company’s computation of expected life was determined based on the simplified method (the average of the vesting period and option term).
Summary of RSAs and RSUs granted under 1-year PSUs for fiscal year 2013 and 2012 Incentive Plans	The table below summarizes the RSAs and RSUs granted under these PSUs:
				RSAs				RSUs
	Incentive Plans for Fiscal Years	Performance Period		Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
				(in millions)				(in millions)
	2013	1 year		0.4		$27.11		0.1		$26.12
	2012	1 year		1.2		$26.39		0.2		$25.40
Summary of 3-year PSUs for fiscal year 2010 Incentive Plans	Unrestricted shares of common stock were issued in settlement immediately upon grant as follows:
	Incentive Plans	Performance		Unrestricted Shares		Weighted Average
	for Fiscal Years	Period		(in millions)		Grant Date Fair Value
	2010	3 years		0.2		$26.39
Summary of RSAs and RSUs granted under 1-year PSUs for fiscal year 2013 and 2012 Sales Retention Equity Programs	The table below summarizes the RSAs and RSUs granted under these programs:
				RSAs				RSUs
	Incentive Plans for Fiscal Years	Performance Period		Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
				(in millions)				(in millions)
	2013	1 year		0.2		$27.11		0.1		$24.13
	2012	1 year		0.2		$26.39		0.1		$23.41
Summary of RSAs and RSUs granted	The table below summarizes all of the RSAs and RSUs, including grants made pursuant to the long-term incentive plans discussed above, granted during the three and six months ended September 30, 2013 and 2012:
		Three Months Ended								Six Months Ended
		September 30,								September 30,
		2013				2012				2013			2012
		(shares in millions)
	RSAs
	Shares	—			(1)	—			(1)	2.7			3.6
	Weighted average grant date fair value (2)	$	30.39			$	25.54			$	27.01		$	26.23
	RSUs
	Shares	—			(1)	—			(1)	0.8			0.7
	Weighted average grant date fair value (3)	$	30.13			$	23.63			$	25.37		$	24.29
	-1	Less than 0.1 million.
	-2	The fair value is based on the quoted market value of the Company's common stock on the grant date.
	-3	The fair value is based on the quoted market value of the Company's common stock on the grant date reduced by the present value of dividends expected to be paid on the Company's common stock prior to vesting of the RSUs, which is calculated using a risk-free interest rate.

Supplemental_Statement_of_Cash1

Supplemental Statement of Cash Flows Information (Tables)	6 Months Ended
	Sep. 30, 2013
Supplemental Statement of Cash Flows Information [Abstract]
Activity under cash pooling arrangement	The activity under this cash pooling arrangement for the six months ended September 30, 2013 and 2012 was as follows:
		Six Months Ended
		September 30,
		2013			2012
		(in millions)
	Total borrowing position outstanding at beginning of period (1)	$	136		$	139
	Borrowings	1,609			513
	Repayments	(1,639		)	(481		)
	Foreign currency exchange effect	20			(7		)
	Total borrowing position outstanding at end of period (1)	$	126		$	164
	-1	Included in “Accrued expenses and other current liabilities” in the Company’s Condensed Consolidated Balance Sheets.

Segment_Information_Tables

Segment Information (Tables)	6 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
Segment information
	Three Months Ended September 30, 2012		Mainframe				Enterprise				Services				Total
	(dollars in millions)		Solutions				Solutions
	Revenue		$	619			$	438			$	95			$	1,152
	Expenses		250				409				89				748
	Segment profit		$	369			$	29			$	6			$	404
	Segment operating margin		60		%		7		%		6		%		35		%
	Depreciation		$	16			$	11			$	—			$	27
	Six Months Ended September 30, 2012		Mainframe				Enterprise				Services				Total
	(dollars in millions)		Solutions				Solutions
	Revenue		$	1,247			$	864			$	186			$	2,297
	Expenses		511				766				176				1,453
	Segment profit		$	736			$	98			$	10			$	844
	Segment operating margin		59		%		11		%		5		%		37		%
	Depreciation		$	32			$	22			$	—			$	54
	Three Months Ended September 30, 2013		Mainframe				Enterprise				Services				Total
	(dollars in millions)		Solutions				Solutions
	Revenue		$	624			$	419			$	97			$	1,140
	Expenses		228				357				88				673
	Segment profit		$	396			$	62			$	9			$	467
	Segment operating margin		63		%		15		%		9		%		41		%
	Depreciation		$	13			$	9			$	—			$	22
	Six Months Ended September 30, 2013		Mainframe				Enterprise				Services				Total
	(dollars in millions)		Solutions				Solutions
	Revenue		$	1,243			$	830			$	195			$	2,268
	Expenses		470				727				178				1,375
	Segment profit		$	773			$	103			$	17			$	893
	Segment operating margin		62		%		12		%		9		%		39		%
	Depreciation		$	26			$	18			$	—			$	44
Reconciliation of segment profit to income before income taxes	Reconciliation of segment profit to income before income taxes for the three months ended September 30, 2013:
	(in millions)
	Segment profit	$	467
	Less:
	Purchased software amortization	31
	Other intangibles amortization	15
	Software development costs capitalized	(8		)
	Internally developed software products amortization	42
	Share-based compensation expense	21
	Other (gains) expenses, net (1)	7
	Interest expense, net	13
	Income before income taxes	$	346
	-1	Other (gains) expenses, net consists of approximately $2 million of costs associated with the Fiscal 2014 Plan, certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
	Reconciliation of segment profit to income before income taxes for the three months ended September 30, 2012:
	(in millions)
	Segment profit	$	404
	Less:
	Purchased software amortization	27
	Other intangibles amortization	13
	Software development costs capitalized	(42		)
	Internally developed software products amortization	40
	Share-based compensation expense	21
	Other (gains) expenses, net (1)	8
	Interest expense, net	10
	Income before income taxes	$	327
	-1	Other (gains) expenses, net consists of certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
	Reconciliation of segment profit to income before income taxes for the six months ended September 30, 2013:
	(in millions)
	Segment profit	$	893
	Less:
	Purchased software amortization	59
	Other intangibles amortization	29
	Software development costs capitalized	(31		)
	Internally developed software products amortization	83
	Share-based compensation expense	41
	Other (gains) expenses, net (1)	125
	Interest expense, net	24
	Income before income taxes	$	563
	-1	Other (gains) expenses, net consists of approximately $122 million of costs associated with the Fiscal 2014 Plan, certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
	Reconciliation of segment profit to income before income taxes for the six months ended September 30, 2012:
	(in millions)
	Segment profit	$	844
	Less:
	Purchased software amortization	54
	Other intangibles amortization	27
	Software development costs capitalized	(78		)
	Internally developed software products amortization	77
	Share-based compensation expense	44
	Other (gains) expenses, net (1)	2
	Interest expense, net	21
	Income before income taxes	$	697
	-1	Other (gains) expenses, net consists of certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
Revenue from the United States and international locations	The table below summarizes the Company’s revenue from the United States and from international (i.e., non-U.S.) locations:
		Three Months Ended								Six Months Ended
		September 30,								September 30,
		2013				2012				2013				2012
		(in millions)
	United States	$	687			$	685			$	1,360			$	1,368
	Europe	267				266				531				538
	Other	186				201				377				391
	Total revenue	$	1,140			$	1,152			$	2,268			$	2,297

Accounting_Policies_Details

Accounting Policies (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified		Other (Gains) Expenses, Net [Member]
Accounting Policies [Line Items]
Intellectual property assets transaction value		$35
Accounting Policies (Textual) [Abstract]
Percentage of cash and cash equivalents held by the Company's foreign subsidiaries outside the United States	59.00%

Acquisitions_Details

Acquisitions (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013		Jun. 30, 2013	Sep. 30, 2013
In Millions, unless otherwise specified			Layer 7 [Member]		Layer 7 [Member]	Layer 7 [Member]
						Purchased Software [Member]
Allocation of purchase price and estimated useful lives by acquisition
Percentage of voting equity interest acquired					100.00%
Finite-lived intangible assets			$12	[1]
Purchased software			99
Goodwill			54
Deferred tax liabilities			-14
Other assets net of other liabilities assumed			4	[2]
Purchase price			155		155
Cash acquired from acquisition			9
Estimated Useful Life [Abstract]
Finite-lived intangible assets, Estimated useful life			5 years	[1]		5 years
Goodwill, Estimated useful life			Indefinite
Acquisitions (Textual) [Abstract]
Accrued acquisition-related costs related to purchase price amounts withheld to support indemnification obligations	$34	$14
[1]	Includes customer relationships and trade names.
[2]	Includes approximately $9 million of cash acquired.

Severance_and_Exit_Costs_1_Det

Severance and Exit Costs 1 (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified					Severance Charges [Member]	Severance Charges [Member]	Facility Exit Charges [Member]	Facility Exit Charges [Member]
Severance and exit costs activity
Accrued beginning balance	$85	$39	$35	$53	$16	$13	$23	$40
Expense					111	0	19	0
Change in estimate					-9	-3	0	0
Payments					-69	-7	-6	-5
Accretion and other					3	0	-3	-3
Accrued ending balance	$85	$39	$35	$53	$52	$3	$33	$32

Severance_and_Exit_Costs_2_Det

Severance and Exit Costs 2 (Details) (USD $)

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2012

Mar. 31, 2012

31-May-13

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

In Millions, unless otherwise specified

Severance Charges [Member]

Severance Charges [Member]

Severance Charges [Member]

Severance Charges [Member]

Facility Exit Charges [Member]

Facility Exit Charges [Member]

Facility Exit Charges [Member]

Facility Exit Charges [Member]

Fiscal Year 2014 Re-Balancing Plan [Member]

Fiscal Year 2014 Re-Balancing Plan [Member]

Fiscal Year 2014 Re-Balancing Plan [Member]

Fiscal Year 2014 Re-Balancing Plan [Member]

Plans and Actions Prior to Fiscal Year 2014 [Member]

Plans and Actions Prior to Fiscal Year 2014 [Member]

Plans and Actions Prior to Fiscal Year 2014 [Member]

Plans and Actions Prior to Fiscal Year 2014 [Member]

Employee

Severance Charges [Member]

Facility Exit Charges [Member]

Severance Charges [Member]

Severance Charges [Member]

Facility Exit Charges [Member]

Facility Exit Charges [Member]

Severance and Exit Costs (Textual) [Abstract]

Workforce re-balancing

1,200

Cost incurred to date

$103

$19

Expected cost

150

130

20

Accrued balance

$85

$39

$35

$53

$52

$16

$3

$13

$33

$23

$32

$40

$7

$3

$15

$32

Trade_Accounts_Receivable_Deta

Trade Accounts Receivable (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Millions, unless otherwise specified
Components of trade accounts receivable, net
Accounts receivable - billed	$523	$796
Accounts receivable - unbilled	67	63
Other receivables	19	21
Less: Allowances	-21	-24
Trade accounts receivable, net	$588	$856

Goodwill_Capitalized_Software_2

Goodwill, Capitalized Software and Other Intangible Assets 1 (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Millions, unless otherwise specified
Capitalized software and other intangible assets
Gross amortizable assets	$8,094	$7,941
Less: Fully amortized assets	5,934	5,825
Remaining amortizable assets	2,160	2,116
Accumulated amortization on remaining amortizable assets	946	885
Net assets	1,214	1,231
Purchased Software Products [Member]
Capitalized software and other intangible assets
Gross amortizable assets	5,703	5,597
Less: Fully amortized assets	4,779	4,735
Remaining amortizable assets	924	862
Accumulated amortization on remaining amortizable assets	323	309
Net assets	601	553
Internally Developed Software Products [Member]
Capitalized software and other intangible assets
Gross amortizable assets	1,559	1,528
Less: Fully amortized assets	675	661
Remaining amortizable assets	884	867
Accumulated amortization on remaining amortizable assets	396	327
Net assets	488	540
Other Intangible Assets [Member]
Capitalized software and other intangible assets
Gross amortizable assets	832	816
Less: Fully amortized assets	480	429
Remaining amortizable assets	352	387
Accumulated amortization on remaining amortizable assets	227	249
Net assets	$125	$138

Goodwill_Capitalized_Software_3

Goodwill, Capitalized Software and Other Intangible Assets 2 (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Projected annual amortization expense for current fiscal year and next four fiscal years
2014	$338
2015	307
2016	257
2017	204
2018	151
Purchased Software Products [Member]
Projected annual amortization expense for current fiscal year and next four fiscal years
2014	118
2015	111
2016	109
2017	107
2018	104
Internally Developed Software Products [Member]
Projected annual amortization expense for current fiscal year and next four fiscal years
2014	166
2015	150
2016	120
2017	86
2018	40
Other Intangible Assets [Member]
Projected annual amortization expense for current fiscal year and next four fiscal years
2014	54
2015	46
2016	28
2017	11
2018	$7

Goodwill_Capitalized_Software_4

Goodwill, Capitalized Software and Other Intangible Assets 3 (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Goodwill activity by segment
Balance at March 31, 2013	$5,871
Revision to preliminary purchase price allocation of prior year acquisition	-6
Balance at March 31, 2013 as revised		5,865
Acquisitions	54
Foreign currency translation adjustment	1
Balance at September 30, 2013	5,920
Mainframe Solutions [Member]
Goodwill activity by segment
Balance at March 31, 2013	4,178
Revision to preliminary purchase price allocation of prior year acquisition	0
Balance at March 31, 2013 as revised		4,178
Acquisitions	0
Foreign currency translation adjustment	0
Balance at September 30, 2013	4,178
Enterprise Solutions [Member]
Goodwill activity by segment
Balance at March 31, 2013	1,612
Revision to preliminary purchase price allocation of prior year acquisition	-6
Balance at March 31, 2013 as revised		1,606
Acquisitions	54
Foreign currency translation adjustment	1
Balance at September 30, 2013	1,661
Services [Member]
Goodwill activity by segment
Balance at March 31, 2013	81
Revision to preliminary purchase price allocation of prior year acquisition	0
Balance at March 31, 2013 as revised		81
Acquisitions	0
Foreign currency translation adjustment	0
Balance at September 30, 2013	$81

Goodwill_Capitalized_Software_5

Goodwill, Capitalized Software and Other Intangible Assets 4 (Details)	6 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Uncertainty, Continued marketability of goods and services	The Company evaluates the useful lives and recoverability of capitalized software and other intangible assets when events or changes in circumstances indicate that an impairment may exist. These evaluations require complex assumptions about key factors such as future customer demand, technology trends and the impact of those factors on the technology the Company acquires and develops for its products.B Impairments or revisions to useful lives could result from the use of alternative assumptions that reflect reasonably possible outcomes related to future customer demand or technology trends for assets within the Enterprise Solutions segment.

Deferred_Revenue_Details

Deferred Revenue (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Millions, unless otherwise specified
Current:
Total deferred revenue (billed or collected) - current	$2,038	$2,482
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	856	975
Total deferred revenue (billed or collected)	2,894	3,457
Subscription and Maintenance [Member]
Current:
Total deferred revenue (billed or collected) - current	1,882	2,307
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	824	940
Professional Services [Member]
Current:
Total deferred revenue (billed or collected) - current	136	154
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	30	33
Software Fees and Other [Member]
Current:
Total deferred revenue (billed or collected) - current	20	21
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	$2	$2

Debt_1_Details

Debt 1 (Details)	6 Months Ended	12 Months Ended
	Sep. 30, 2013	Mar. 31, 2013
	Revolving Credit Facility due June 2018 [Member]	Revolving Credit Facility due August 2016 [Member]
Rates applicable to revolving credit facility
Applicable margin on Base Rate borrowing	0.13%	0.25%
Weighted average interest rate on outstanding borrowings	0.00%	0.00%
Applicable margin on Eurocurrency Rate borrowing	1.00%	1.10%
Facility commitment fee	0.13%	0.15%

Debt_2_Details

Debt 2 (Details) (USD $)	6 Months Ended				1 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Sep. 30, 2013
			2.875% Senior Notes due August 2018 (2.875% Notes) [Member]	4.500% Senior Notes due August 2023 (4.500% Notes) [Member]	2.875% Notes and 4.500% Notes [Member]	Revolving Credit Facility due June 2018 [Member]	Revolving Credit Facility due August 2016 [Member]	Base Rate Borrowings [Member]	Eurocurrency Rate Borrowings [Member]
Debt (Textual) [Abstract]
Senior Notes, Face amount			$250,000,000	$250,000,000
Senior Notes, Interest rate			2.88%	4.50%
Proceeds from issuance of Senior Notes	498,000,000	0			498,000,000
Senior Notes, Discount					2,000,000
Additional basis points for redemption of Senior Notes			0.25%	0.30%
Debt issuance costs	4,000,000	0			4,000,000	1,000,000
Maximum committed amount available under revolving credit facility						1,000,000,000
Maximum available credit increase under revolving credit facility						500,000,000
Borrowings outstanding under revolving credit facility						$0	$0
Interest rate that would have applled at September 30, 2013 to a borrowing under revolving credit facility due June 2018								3.38%	1.18%
Covenant description						The revolving credit facility due June 2018 contains customary covenants for borrowings of this type, including two financial covenants: (i)B for the 12B months ending each quarter-end, the ratio of consolidated debt for borrowed money to consolidated cash flow, each as defined in the Credit Agreement, must not exceed 4.00 to 1.00; and (ii)B for the 12B months ending at any date, the ratio of consolidated cash flow to the sum of interest payable on, and amortization of debt discount in respect of, all consolidated debt for borrowed money, as defined in the Credit Agreement, must not be less than 3.50 to 1.00.
Financial covenant ratio of consolidated debt to consolidated cash flow						400.00%
Financial covenant ratio of consolidated cash flow to sum of interest payable and amortization of debt discount						350.00%
Covenant compliance						At SeptemberB 30, 2013, the Company was in compliance with all covenants.

Derivatives_1_Details

Derivatives 1 (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest Rate Swaps [Member] | Fair Value Hedges [Member] | Interest Expense, Net [Member]
Effect of interest rate and foreign exchange derivatives on Consolidated Statements of Operations
Amount of net (gain)/loss from derivative instruments recognized in the Condensed Consolidated Statements of Operations	($3)	($3)	($6)	($6)
Foreign Currency Contracts [Member] | Other (Gains) Expenses, Net [Member]
Effect of interest rate and foreign exchange derivatives on Consolidated Statements of Operations
Amount of net (gain)/loss from derivative instruments recognized in the Condensed Consolidated Statements of Operations	($6)	$2	($15)	$10

Derivatives_2_Details

Derivatives 2 (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Derivatives, Fair Value [Line Items]
Total value of Senior Notes subject to fair value interest rate swaps	$500
Fair value of interest rate derivative assets	14	19
Notional value of purchase and sales contracts for foreign currency contracts outstanding	746	597
Tenure of foreign currency contracts outstanding	less than six months	less than one month
Net fair value of foreign currency contracts	2	1
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of interest rate derivative assets	12	11
Fair value of foreign currency contracts included in "Other current assets"	9	1
Other Noncurrent Assets, Net [Member]
Derivatives, Fair Value [Line Items]
Fair value of interest rate derivative assets	2	8
Accrued Expenses and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of foreign currency contracts included in "Accrued expenses and other current liabilities"	7
6.125% Senior Notes due December 2014 [Member]
Derivatives, Fair Value [Line Items]
Long-term debt, Interest rate	6.13%
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional value of interest rate swaps designated as fair value hedges	$500

Fair_Value_Measurements_1_Deta

Fair Value Measurements 1 (Details) (USD $)	Sep. 30, 2013		Mar. 31, 2013
In Millions, unless otherwise specified
Assets
Interest rate derivatives	$14		$19
Fair Value, Measurements, Recurring [Member]
Assets
Foreign exchange derivatives	9	[1]	1	[1]
Interest rate derivatives	14	[1]	19	[1]
Total assets	1,026		1,300
Liabilities
Foreign exchange derivatives	7	[1]	0	[1]
Total liabilities	7		0
Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Assets
Money market funds	1,003	[2]	1,280	[3]
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets
Total assets	1,003		1,280
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Money Market Funds [Member]
Assets
Money market funds	1,003		1,280
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets
Foreign exchange derivatives	9	[1]	1	[1]
Interest rate derivatives	14	[1]	19	[1]
Total assets	23		20
Liabilities
Foreign exchange derivatives	7	[1]	0	[1]
Total liabilities	$7		$0
[1]	See Note H, bDerivativesb for additional information. Interest rate derivatives fair value excludes accrued interest.
[2]	At SeptemberB 30, 2013, the Company had approximately $953 million and $50 million of investments in money market funds classified as bCash and cash equivalentsb and bOther noncurrent assets, netb for restricted cash amounts, respectively, in its Condensed Consolidated Balance Sheet.
[3]	At MarchB 31, 2013, the Company had approximately $1,230 million and $50 million of investments in money market funds classified as bCash and cash equivalentsb and bOther noncurrent assets, netb for restricted cash amounts, respectively, in its Condensed Consolidated Balance Sheet.

Fair_Value_Measurements_2_Deta

Fair Value Measurements 2 (Details) (USD $)	Sep. 30, 2013		Mar. 31, 2013
In Millions, unless otherwise specified
Carrying Value [Member]
Liabilities
Total debt	$1,779	[1]	$1,290	[1]
Facility exit reserve	32	[2]	23	[2]
Estimated Fair Value [Member]
Liabilities
Total debt	1,892	[1]	1,413	[1]
Facility exit reserve	$35	[2]	$27	[2]
[1]	Estimated fair value of total debt is based on quoted prices for similar liabilities for which significant inputs are observable except for certain long-term lease obligations, for which fair value approximates carrying value (Level 2).
[2]	Estimated fair value for the facility exit reserve is determined using the Companybs incremental borrowing rate at SeptemberB 30, 2013 and MarchB 31, 2013. At SeptemberB 30, 2013 and MarchB 31, 2013, the facility exit reserve included approximately $10 million and $6 million, respectively, in bAccrued expenses and other current liabilitiesb and approximately $22 million and $17 million, respectively, in bOther noncurrent liabilitiesb in the Companybs Condensed Consolidated Balance Sheets (Level 3).

Fair_Value_Measurements_3_Deta

Fair Value Measurements 3 (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Millions, unless otherwise specified
Cash and Cash Equivalents [Member] | Money Market Funds [Member]
Fair Value Measurements (Details Textual) [Abstract]
Cash and cash equivalents, Fair value disclosure	$953	$1,230
Other Noncurrent Assets, Net [Member] | Money Market Funds [Member]
Fair Value Measurements (Details Textual) [Abstract]
Other noncurrent assets, net, Fair value disclosure	50	50
Accrued Expenses and Other Current Liabilities [Member] | Facility Exit Reserve [Member]
Fair Value Measurements (Details Textual) [Abstract]
Accrued expenses and other current liabilities, Fair value disclosure	10	6
Other Noncurrent Liabilities [Member] | Facility Exit Reserve [Member]
Fair Value Measurements (Details Textual) [Abstract]
Other noncurrent liabilities, Fair value disclosure	$22	$17

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Commitments and Contingencies (Textual) [Abstract]
Loss contingency, Range of reasonably possible loss, Minimum	$0
Loss contingency, Range of reasonably possible loss, Maximum	$25

Stockholders_Equity_1_Details

Stockholders' Equity 1 (Details) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2012
Cash dividends
Declaration date	1-Aug-13	9-May-13	2-Aug-12	8-May-12
Dividend per share	$0.25	$0.25	$0.25	$0.25
Record date	22-Aug-13	23-May-13	14-Aug-12	22-May-12
Total amount	$114	$114	$116	$119
Payment date	10-Sep-13	11-Jun-13	11-Sep-12	12-Jun-12

Stockholders_Equity_2_Details

Stockholders' Equity 2 (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Stockholders' Equity (Textual) [Abstract]
Shares of common stock repurchased	7
Value of common stock repurchased	$198
Remaining authorized common stock repurchase amount	307
Accumulated other comprehensive loss	$175	$155

Income_Per_Common_Share_Detail

Income Per Common Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic income per common share
Net income	$240	$222	$575	$462
Less: Net income allocable to participating securities	-2	-2	-6	-5
Net income allocable to common shares	238	220	569	457
Weighted average common shares outstanding	448	458	449	462
Basic income per common share	$0.53	$0.48	$1.27	$0.99
Diluted income per common share
Net income	240	222	575	462
Less: Net income allocable to participating securities	-2	-2	-6	-5
Net income allocable to common shares	$238	$220	$569	$457
Weighted average shares outstanding and common share equivalents
Weighted average common shares outstanding	448	458	449	462
Weighted average effect of share-based payment awards	2	1	1	1
Denominator in calculation of diluted income per share	450	459	450	463
Diluted income per common share	$0.53	$0.48	$1.26	$0.99
Income Per Common Share (Textual) [Abstract]
Number of anti-dilutive restricted stock awards and options excluded from the calculation	2	4	2	3
Weighted average restricted stock awards considered participating securities	5	5	5	6

Accounting_for_ShareBased_Comp2

Accounting for Share-Based Compensation 1 (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Recognized share-based compensation
Share-based compensation expense before tax	$21	$21	$41	$44
Income tax benefit	-6	-8	-13	-16
Net share-based compensation expense	15	13	28	28
Costs of Licensing and Maintenance [Member]
Recognized share-based compensation
Share-based compensation expense before tax	1	1	2	1
Cost of Professional Services [Member]
Recognized share-based compensation
Share-based compensation expense before tax	1	1	2	2
Selling and Marketing [Member]
Recognized share-based compensation
Share-based compensation expense before tax	8	8	15	18
General and Administrative [Member]
Recognized share-based compensation
Share-based compensation expense before tax	6	7	12	15
Product Development and Enhancements [Member]
Recognized share-based compensation
Share-based compensation expense before tax	$5	$4	$10	$8

Accounting_for_ShareBased_Comp3

Accounting for Share-Based Compensation 2 (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Unrecognized share-based compensation costs
Unrecognized share-based compensation costs	$131
Weighted average period expected to be recognized	2 years 3 months 18 days
Stock Option Awards [Member]
Unrecognized share-based compensation costs
Unrecognized share-based compensation costs	10
Weighted average period expected to be recognized	2 years 4 months 24 days
Restricted Stock Units [Member]
Unrecognized share-based compensation costs
Unrecognized share-based compensation costs	24
Weighted average period expected to be recognized	2 years 2 months 12 days
Restricted Stock Awards [Member]
Unrecognized share-based compensation costs
Unrecognized share-based compensation costs	75
Weighted average period expected to be recognized	2 years 1 month 6 days
Performance Share Units [Member]
Unrecognized share-based compensation costs
Unrecognized share-based compensation costs	$22
Weighted average period expected to be recognized	2 years 9 months 18 days

Accounting_for_ShareBased_Comp4

Accounting for Share-Based Compensation 3 (Details) (USD $)	6 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Weighted average fair values and assumptions used for options granted
Weighted average fair value	$5.19		$4.84
Dividend yield	4.05%		3.96%
Expected volatility factor	30.00%	[1]	34.00%	[1]
Risk-free interest rate	1.50%	[2]	0.80%	[2]
Expected life (in years)	6 years 0 months	[3]	4 years 6 months	[3]
[1]	Expected volatility is measured using historical daily price changes of the Companybs stock over the respective expected term of the options and the implied volatility derived from the market prices of the Companybs traded options.
[2]	The risk-free rate for periods within the contractual term of the stock options is based on the U.S. Treasury yield curve in effect at the time of grant.
[3]	The expected life is the number of years the Company estimates that options will be outstanding prior to exercise. The Companybs computation of expected life was determined based on the simplified method (the average of the vesting period and option term).

Accounting_for_ShareBased_Comp5

Accounting for Share-Based Compensation 4 (Details) (USD $)	3 Months Ended				6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Restricted Stock Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	0	[1]	0	[1]	2.7		3.6
Weighted average grant date fair value	$30.39	[2]	$25.54	[2]	$27.01	[2]	$26.23	[2]
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	0	[1]	0	[1]	0.8		0.7
Weighted average grant date fair value	$30.13	[3]	$23.63	[3]	$25.37	[3]	$24.29	[3]
1-Year PSUs for Fiscal Year 2013 Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period					1 year
1-Year PSUs for Fiscal Year 2013 Incentive Plans [Member] | Restricted Stock Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted					0.4
Weighted average grant date fair value					$27.11
1-Year PSUs for Fiscal Year 2013 Incentive Plans [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted					0.1
Weighted average grant date fair value					$26.12
1-Year PSUs for Fiscal Year 2012 Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period							1 year
1-Year PSUs for Fiscal Year 2012 Incentive Plans [Member] | Restricted Stock Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted							1.2
Weighted average grant date fair value							$26.39
1-Year PSUs for Fiscal Year 2012 Incentive Plans [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted							0.2
Weighted average grant date fair value							$25.40
3-Year PSUs for Fiscal Year 2010 Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period							3 years
Number of shares granted							0.2
Weighted average grant date fair value							$26.39
1-Year PSUs for Fiscal Year 2013 Sales Retention Equity Programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period					1 year
1-Year PSUs for Fiscal Year 2013 Sales Retention Equity Programs [Member] | Restricted Stock Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted					0.2
Weighted average grant date fair value					$27.11
1-Year PSUs for Fiscal Year 2013 Sales Retention Equity Programs [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted					0.1
Weighted average grant date fair value					$24.13
1-Year PSUs for Fiscal Year 2012 Sales Retention Equity Programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period							1 year
1-Year PSUs for Fiscal Year 2012 Sales Retention Equity Programs [Member] | Restricted Stock Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted							0.2
Weighted average grant date fair value							$26.39
1-Year PSUs for Fiscal Year 2012 Sales Retention Equity Programs [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted							0.1
Weighted average grant date fair value							$23.41
[1]	Less than 0.1 million.
[2]	The fair value is based on the quoted market value of the Company's common stock on the grant date.
[3]	The fair value is based on the quoted market value of the Company's common stock on the grant date reduced by the present value of dividends expected to be paid on the Company's common stock prior to vesting of the RSUs, which is calculated using a risk-free interest rate.

Accounting_for_ShareBased_Comp6

Accounting for Share-Based Compensation 5 (Details) (USD $)	3 Months Ended				6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Restricted Stock Awards (RSAs) [Member]
Summary of RSAs and RSUs granted
Number of shares granted	0	[1]	0	[1]	2.7		3.6
Weighted average grant date fair value	$30.39	[2]	$25.54	[2]	$27.01	[2]	$26.23	[2]
Restricted Stock Units (RSUs) [Member]
Summary of RSAs and RSUs granted
Number of shares granted	0	[1]	0	[1]	0.8		0.7
Weighted average grant date fair value	$30.13	[3]	$23.63	[3]	$25.37	[3]	$24.29	[3]
[1]	Less than 0.1 million.
[2]	The fair value is based on the quoted market value of the Company's common stock on the grant date.
[3]	The fair value is based on the quoted market value of the Company's common stock on the grant date reduced by the present value of dividends expected to be paid on the Company's common stock prior to vesting of the RSUs, which is calculated using a risk-free interest rate.

Accounting_for_ShareBased_Comp7

Accounting for Share-Based Compensation 6 (Details) (USD $)	6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013
			Performance Share Units [Member]	Performance Share Units [Member]	Performance Share Units [Member]	Employee Stock Purchase Plan [Member]	Employee Stock Purchase Plan [Member]
			Grant Date [Member]	First Anniversary [Member]	Second Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
1-year PSU awards vesting percentage			34.00%	33.00%	33.00%
Percentage of stock closing price on last day of offer period that ESPP participants can purchase Company stock						95.00%
Number of shares issued under Employee Stock Purchase Plan						0.1
Average price of shares issued under Employee Stock Purchase Plan						$27.19
Number of shares available for future issuances under Employee Stock Purchase Plan							29.7
Accounting for Share-Based Compensation (Textual) [Abstract]
Stock options issued	1.6	0.7
Computation of expected life, Simplified method	The Companybs computation of expected life was determined based on the simplified method (the average of the vesting period and option term).

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Taxes (Textual) [Abstract]
Income tax expense (benefit)	$106	$105	($12)	$235
Net discrete tax benefit recognized primarily from completion of federal income tax returns examination			179
Estimated annual effective tax rate, which excludes impact of discrete items			29.70%	33.00%
Expected fiscal year 2014 effective tax rate			14.00%
Reduction in uncertain tax positions resulting from completion of federal income tax returns examination			221
Cash refund received from completion of federal income tax returns examination	$70		$70

Supplemental_Statement_of_Cash2

Supplemental Statement of Cash Flows Information 1 (Details) (Notional Pooling Arrangement [Member], USD $)	6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Notional Pooling Arrangement [Member]
Notional Pooling Arrangement [Line Items]
Total borrowing position outstanding at beginning of period	$136	[1]	$139	[1]
Borrowings	1,609		513
Repayments	-1,639		-481
Foreign currency exchange effect	20		-7
Total borrowing position outstanding at end of period	$126	[1]	$164	[1]
[1]	Included in bAccrued expenses and other current liabilitiesb in the Companybs Condensed Consolidated Balance Sheets.

Supplemental_Statement_of_Cash3

Supplemental Statement of Cash Flows Information 2 (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Supplemental Statement of Cash Flows Information (Textual) [Abstract]
Interest payments, net	$31	$31
Income taxes paid, net	255	150
Excess tax benefits from options exercised included in financing activities	3	5
Share-based incentive awards	46	62
Withholding taxes on share-based incentive awards	27	34
Discretionary stock contributions to CA, Inc. Savings Harvest Plan	$28	$29

Segment_Information_1_Details

Segment Information 1 (Details) (USD $)	3 Months Ended				6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment information
Revenue	$1,140		$1,152		$2,268		$2,297
Income before interest and income taxes	359		337		587		718
Reconciliation of segment profit to income before income taxes
Segment profit	359		337		587		718
Software development costs capitalized	-8		-42		-31		-78
Share-based compensation expense	21		21		41		44
Other (gains) expenses, net	7	[1]	8	[2]	125	[3]	2	[2]
Interest expense, net	13		10		24		21
Income before income taxes	346		327		563		697
Purchased Software Products [Member]
Reconciliation of segment profit to income before income taxes
Amortization of intangible ssets	31		27		59		54
Other Intangible Assets [Member]
Reconciliation of segment profit to income before income taxes
Amortization of intangible ssets	15		13		29		27
Internally Developed Software Products [Member]
Reconciliation of segment profit to income before income taxes
Amortization of intangible ssets	42		40		83		77
Mainframe Solutions [Member]
Segment information
Revenue	624		619		1,243		1,247
Expenses	228		250		470		511
Income before interest and income taxes	396		369		773		736
Segment operating margin	63.00%		60.00%		62.00%		59.00%
Depreciation	13		16		26		32
Reconciliation of segment profit to income before income taxes
Segment profit	396		369		773		736
Enterprise Solutions [Member]
Segment information
Revenue	419		438		830		864
Expenses	357		409		727		766
Income before interest and income taxes	62		29		103		98
Segment operating margin	15.00%		7.00%		12.00%		11.00%
Depreciation	9		11		18		22
Reconciliation of segment profit to income before income taxes
Segment profit	62		29		103		98
Services [Member]
Segment information
Revenue	97		95		195		186
Expenses	88		89		178		176
Income before interest and income taxes	9		6		17		10
Segment operating margin	9.00%		6.00%		9.00%		5.00%
Depreciation	0		0		0		0
Reconciliation of segment profit to income before income taxes
Segment profit	9		6		17		10
Total Reportable Segments [Member]
Segment information
Revenue	1,140		1,152		2,268		2,297
Expenses	673		748		1,375		1,453
Income before interest and income taxes	467		404		893		844
Segment operating margin	41.00%		35.00%		39.00%		37.00%
Depreciation	22		27		44		54
Reconciliation of segment profit to income before income taxes
Segment profit	$467		$404		$893		$844
[1]	Other (gains) expenses, net consists of approximately $2 million of costs associated with the Fiscal 2014 Plan, certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
[2]	Other (gains) expenses, net consists of certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.
[3]	Other (gains) expenses, net consists of approximately $122 million of costs associated with the Fiscal 2014 Plan, certain foreign exchange derivative hedging gains and losses, and other miscellaneous costs.Three Months Ended September 30, 2012B MainframeSolutionsB EnterpriseSolutionsB ServicesB Total(dollars in millions)RevenueB $619B $438B $95B $1,152ExpensesB 250B 409B 89B 748Segment profitB $369B $29B $6B $404Segment operating marginB 60%B 7%B 6%B 35%DepreciationB $16B $11B $bB $27

Segment_Information_2_Details

Segment Information 2 (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue from the United States and international locations
Total revenue	$1,140	$1,152	$2,268	$2,297
United States [Member]
Revenue from the United States and international locations
Total revenue	687	685	1,360	1,368
Europe [Member]
Revenue from the United States and international locations
Total revenue	267	266	531	538
Other [Member]
Revenue from the United States and international locations
Total revenue	$186	$201	$377	$391

Segment_Information_3_Details

Segment Information 3 (Details) (USD $)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
	Fiscal Year 2014 Re-Balancing Plan [Member]	Fiscal Year 2014 Re-Balancing Plan [Member]	Enterprise Solutions [Member]
Segment Reporting [Line Items]
Intellectual property assets transaction value			$35
Re-balancing charges	$2	$122