Computer Sciences (CSC) 10-Q 11 Feb 15 2015 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Jan. 02, 2015	Jan. 23, 2015
Entity Information [Line Items]
Entity Registrant Name	COMPUTER SCIENCES CORP
Entity Central Index Key	23082
Current Fiscal Year End Date	1
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	2-Jan-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		141,046,567

CONSOLIDATED_CONDENSED_STATEME

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Revenues	$2,947	$3,228	$9,264	$9,669
Costs of services (excludes depreciation and amortization and restructuring costs)	2,530	2,261	7,101	7,015
Selling, general and administrative (excludes SEC settlement related charges and restructuring costs)	356	318	1,046	920
Selling, general and administrative - SEC settlement related charges	195	0	195	0
Depreciation and amortization	238	251	762	753
Restructuring costs	12	11	15	33
Interest expense	37	38	112	112
Interest income	-4	-4	-14	-11
Other (income) expense, net	1	-5	6	16
Total costs and expenses	3,365	2,870	9,223	8,838
(Loss) income from continuing operations, before taxes	-418	358	41	831
Income tax (benefit) expense	-105	77	18	227
(Loss) income from continuing operations	-313	281	23	604
(Loss) income from discontinued operations, net of taxes	0	-5	-29	91
Net (loss) income	-313	276	-6	695
Less: net income attributable to noncontrolling interest, net of tax	1	5	11	18
Net (loss) income attributable to CSC common stockholders	($314)	$271	($17)	$677
Earnings (loss) per common share - Basic:
Continuing operations (in dollars per share)	($2.23)	$1.88	$0.08	$3.96
Discontinued operations (in dollars per share)	$0	($0.03)	($0.20)	$0.61
Basic EPS (in dollars per share)	($2.23)	$1.85	($0.12)	$4.57
Earnings (loss) per common share - Diluted:
Continuing operations (in dollars per share)	($2.23)	$1.84	$0.08	$3.88
Discontinued operations (in dollars per share)	$0	($0.03)	($0.20)	$0.60
Diluted EPS (in dollars per share)	($2.23)	$1.81	($0.12)	$4.48
Cash dividend per common share (in dollars per share)	$0.23	$0.20	$0.69	$0.60

CONSOLIDATED_CONDENSED_STATEME1

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Statement of Comprehensive Income [Abstract]
Net (loss) income	($313)	$276	($6)	$695
Other comprehensive (loss) income, net of taxes:
Foreign currency translation	-90	-9	-189	-93
Foreign currency forward contracts	-2	0	-8	0
Pension and other post-retirement benefit plans	52	260	48	260
Other comprehensive (loss) income, net of taxes	-40	251	-149	167
Comprehensive (loss) income	-353	527	-155	862
Less: comprehensive income attributable to noncontrolling interest, net of taxes	1	5	11	27
Comprehensive (loss) income attributable to CSC common stockholders	($354)	$522	($166)	$835

CONSOLIDATED_CONDENSED_BALANCE

CONSOLIDATED CONDENSED BALANCE SHEETS (USD $)	Jan. 02, 2015	Mar. 28, 2014
In Millions, unless otherwise specified
ASSETS
Cash and cash equivalents	$2,393	$2,443
Receivables, net of allowance for doubtful accounts of $42 (fiscal 2015) and $48 (fiscal 2014)	2,435	2,759
Prepaid expenses and other current assets	358	426
Total current assets	5,186	5,628
Property and equipment, net of accumulated depreciation of $3,689 (fiscal 2015) and $3,620 (fiscal 2014)	1,692	2,031
Software, net of accumulated amortization of $1,681 (fiscal 2015) and $1,680 (fiscal 2014)	776	650
Outsourcing contract costs, net of accumulated amortization of $1,003 (fiscal 2015) and $1,038 (fiscal 2014)	330	427
Goodwill, net	1,669	1,667
Other assets	1,000	986
Total Assets	10,653	11,389
LIABILITIES
Short-term debt and current maturities of long-term debt	554	681
Accounts payable	339	394
Accrued payroll and related costs	459	592
Accrued expenses and other current liabilities	1,186	1,094
Deferred revenue and advance contract payments	625	624
Income taxes payable and deferred income taxes	27	77
Total current liabilities	3,190	3,462
Long-term debt, net of current maturities	2,170	2,207
Income tax liabilities and deferred income taxes	547	557
Other long-term liabilities	1,391	1,219
EQUITY
Common stock, par value $1 per share; authorized 750,000,000; issued 150,565,444 (fiscal 2015) and 154,720,451 (fiscal 2014)	151	155
Additional paid-in capital	2,381	2,304
Earnings retained for use in business	1,101	1,592
Accumulated other comprehensive income	141	279
Less common stock in treasury, at cost, 9,573,574 (fiscal 2015) and 9,149,009 (fiscal 2014)	-444	-418
Total CSC stockholders’ equity	3,330	3,912
Noncontrolling interest in subsidiaries	25	32
Total Equity	3,355	3,944
Total Liabilities and Equity	$10,653	$11,389

CONSOLIDATED_CONDENSED_BALANCE1

CONSOLIDATED CONDENSED BALANCE SHEETS (PARENTHETICAL) (USD $)	Jan. 02, 2015	Mar. 28, 2014
In Millions, except Share data, unless otherwise specified
Current assets:
Allowance for doubtful accounts	$42	$48
Intangible and other assets:
Accumulated Depreciation, Property and Equipment	3,689	3,620
Accumulated Amortization	3,007	3,033
CSC stockholders' equity:
Common stock, par value (in dollars per share)	$1	$1
Common stock, authorized (in shares)	750,000,000	750,000,000
Common stock, issued (in shares)	150,565,444	154,720,451
Common stock in treasury, at cost (in shares)	9,573,574	9,149,009
Software
Intangible and other assets:
Accumulated Amortization	1,681	1,680
Outsourcing contract costs
Intangible and other assets:
Accumulated Amortization	$1,003	$1,038

CONSOLIDATED_CONDENSED_STATEME2

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013
Cash flows from operating activities:
Net (loss) income	($6)	$695
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	762	753
Pension & OPEB actuarial & settlement losses (gains)	463	-114
SEC settlement related charges	195	0
Stock-based compensation	54	53
Gain on dispositions	-22	-95
Excess tax benefit from stock based compensation	-15	-5
Unrealized foreign currency exchange gain	0	-19
Other non cash charges, net	22	35
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Decrease in assets	171	122
Decrease in liabilities	-481	-413
Net cash provided by operating activities	1,143	1,012
Cash flows from investing activities:
Purchases of property and equipment	-283	-287
Payments for outsourcing contract costs	-43	-55
Software purchased and developed	-145	-142
Payments for acquisitions, net of cash acquired	-35	-190
Business dispositions	-13	245
Proceeds from sale of assets	99	25
Other investing activities, net	21	27
Net cash used in investing activities	-399	-377
Cash flows from financing activities:
Borrowings under lines of credit and short-term debt	0	408
Repayment of borrowings under lines of credit	-32
Principal payments on long-term debt	-193	-424
Proceeds from stock options and other common stock transactions	151	112
Excess tax benefit from stock-based compensation	15	5
Repurchase of common stock	-518	-376
Dividend payments	-95	-89
Other financing activities, net	-7	-29
Net cash used in financing activities	-679	-393
Effect of exchange rate changes on cash and cash equivalents	-115	-12
Net (decrease) increase in cash and cash equivalents	-50	230
Cash and cash equivalents at beginning of year	2,443	2,054
Cash and cash equivalents at end of period	$2,393	$2,284

CONSOLIDATED_CONDENSED_STATEME3

CONSOLIDATED CONDENSED STATEMENTS OF CHANGES IN EQUITY (USD $)	Total	Common Stock	Additional Paid-in Capital	Earnings Retained for Use in Business	Accumulated Other Comprehensive Income (Loss)	Common Stock in Treasury	Total CSC Equity	Non- Controlling Interest
In Millions, except Share data, unless otherwise specified
Balance at Mar. 29, 2013	$3,160	$159	$2,167	$1,101	$108	($401)	$3,134	$26
Balance (in shares) at Mar. 29, 2013		158,984,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	695			677			677	18
Other comprehensive (loss) income	167				167		167
Stock-based compensation expense	52		52				52
Acquisition of treasury stock	-12					-12	-12
Stock option exercises and other common stock transactions (in shares)		3,269,000
Stock option exercises and other common stock transactions	113	3	110				113
Share repurchase program (shares)		-7,279,000
Share repurchase program	-354	-7	-108	-239			-354
Cash dividends declared	-89			-89			-89
Adjustments from divestiture of business	9						0	9
Noncontrolling interest distributions and other	-25			9	-9		0	-25
Balance at Dec. 27, 2013	3,716	155	2,221	1,459	266	-413	3,688	28
Balance (in shares) at Dec. 27, 2013		154,974,000
Balance at Mar. 28, 2014	3,944	155	2,304	1,592	279	-418	3,912	32
Balance (in shares) at Mar. 28, 2014		154,721,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	-6			-17			-17	11
Other comprehensive (loss) income	-149				-149		-149
Stock-based compensation expense	53		53				53
Acquisition of treasury stock	-26					-26	-26
Stock option exercises and other common stock transactions (in shares)		4,341,000
Stock option exercises and other common stock transactions	167	4	163				167
Share repurchase program (shares)		-8,496,000
Share repurchase program	-512	-8	-139	-365			-512
Cash dividends declared	-98			-98			-98
Noncontrolling interest distributions and other	-18			-11	11		0	-18
Balance at Jan. 02, 2015	$3,355	$151	$2,381	$1,101	$141	($444)	$3,330	$25
Balance (in shares) at Jan. 02, 2015		150,566,000

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Jan. 02, 2015
Basis of Presentation [Abstract]
Basis of Presentation	Basis of Presentation
	Computer Sciences Corporation (CSC or the Company) has prepared the interim period unaudited Consolidated Condensed Financial Statements included herein, as of and for the quarters and nine months ended January 2, 2015 and December 27, 2013, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States of America (GAAP) have been condensed or omitted pursuant to such rules and regulations. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the unaudited Consolidated Condensed Financial Statements and the accompanying notes. The unaudited Consolidated Condensed Financial Statements should be read in conjunction with the financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended March 28, 2014 (fiscal 2014). As further disclosed in Note 5, the Company has reached an understanding with the staff of the SEC pursuant to which the Company intends to restate its financial statements for fiscal 2012 and its summary financial results for fiscal 2011 and fiscal 2010 reflected in the five-year table selected financial data table, all as set forth in CSC's Form 10-K for the fiscal year ended March 28, 2014.
	In the opinion of management, the unaudited Consolidated Condensed Financial Statements included herein reflect all adjustments necessary, including those of a normal recurring nature, to present fairly the financial position, the results of operations and the cash flows for such interim periods. The results of operations for such interim periods are not necessarily indicative of the Company's actual or expected results for the full year ending April 3, 2015 (fiscal 2015).
	The Company reports its results based on a fiscal year convention that comprises four thirteen-week quarters. Every fifth year includes an additional week in the first quarter to prevent the fiscal year from moving from an approximate end of March date. As a result, the first quarter of fiscal 2015 was a fourteen-week quarter.
	During the first quarter of fiscal 2015, the Company changed its accounting policy for the recognition of actuarial gains and losses for its defined benefit pension and other post-employment benefit plans (see Note 2). These changes have been reported through retrospective application of the new accounting methods to all periods presented. As a result, the unaudited Consolidated Condensed Statements of Operations, Comprehensive Income, Cash Flows, and Changes in Equity for the quarter and nine months ended December 27, 2013, the Consolidated Condensed Balance Sheet for the year ended March 28, 2014, and all related notes to such financial statements have been recast from those presented in the previously filed Form 10-Q and Form 10-K, respectively, to reflect this change (see Note 2).
	Effective fiscal 2015, the Company changed its inter-company accounting policy. Previously, inter-company transactions between segments were generally reflected as inter-company revenue. Under the new policy, inter-company transactions are now generally treated as cost transfers. The new inter-company policy has been applied retrospectively, adjusting the segment results for all prior periods (see Note 15).
	The Company's income from continuing operations, before taxes and noncontrolling interest, and diluted earnings (loss) per share (EPS) from continuing operations, included the following adjustments due to changes in estimated profitability on fixed price contracts accounted for under the percentage-of-completion method, for the quarters and nine months ended January 2, 2015 and December 27, 2013:
		Quarter Ended						Nine Months Ended
	(Amounts in millions, except per-share data)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Gross favorable	$	17		$	26		$	89		$	101
	Gross unfavorable	(3		)	(12		)	(20		)	(38		)
	Total net adjustments, before taxes and non-controlling interest	$	14		$	14		$	69		$	63
	Impact on diluted EPS from continuing operations	$	0.06		$	0.06		$	0.27		$	0.26
	Unbilled recoverable amounts under contracts in progress do not have an allowance for credit losses, and therefore, any adjustments to unbilled recoverable amounts under contracts in progress related to credit quality would be accounted for as a reduction of revenue. Unbilled recoverable amounts under contracts in progress resulting from sales, primarily to the United States (U.S.) and other governments, that are expected to be collected after one year totaled $51 million and $46 million as of January 2, 2015 and March 28, 2014, respectively.
	Depreciation expense was $145 million and $469 million for the quarter and nine months ended January 2, 2015, respectively, and $165 million and $498 million for the quarter and nine months ended December 27, 2013, respectively.

Defined_Benefit_Pension_Plan_A

Defined Benefit Pension Plan Accounting Policy Change	9 Months Ended
	Jan. 02, 2015
Accounting Changes and Error Corrections [Abstract]
Defined Benefit Pension Plan Accounting Policy Change	Defined Benefit Pension Plan Accounting Policy Changes
	During the first quarter of fiscal 2015, the Company changed its accounting policy for the recognition of actuarial gains and losses for its defined benefit pension and other post-retirement benefit plans and the calculation of expected return on pension plan assets. Historically, the Company recognized actuarial gains and losses in excess of 10% of the greater of the market-related value of plan assets or the plans’ projected benefit obligations (the “corridor”) as a component of accumulated other comprehensive loss in its Consolidated Condensed Balance Sheets and, depending on the benefit plan, the Company amortized these gains and losses to earnings either over the remaining average service period for the active participants or over the average remaining life expectancy of the inactive participants. Additionally, for the Company’s U.S. plans and the Australian plan, the Company previously used a calculated value for the market-related valuation of pension plan assets, reflecting changes in the fair value of plan assets over a three-year and a one-year period, respectively. Under the Company’s new accounting policies, the Company recognizes changes in actuarial gains and losses and the changes in fair value of plan assets in earnings at the time of plan remeasurement, annually during the fourth quarter of each year, or if there is an interim remeasurement, as a component of net periodic (benefit)/cost (and the Company no longer applies a corridor and, therefore, no longer defers any gains or losses) . The new accounting policies result in the changes in actuarial gains and losses and the changes in fair value of plan assets being recognized in earnings in the year they occur, rather than amortized over time, and therefore recognized earlier than under the Company’s previous methods of accounting. The Company believes the new pension accounting policies are preferable as they recognize the effects of plan investment performance, interest rate changes, and changes in actuarial assumptions as a component of earnings in the year in which they occur rather than amortized over time, and additionally, conform all plans to a consistent policy for determining market-related value of plan assets. These changes have been reported through retrospective application of the new accounting methods to all periods presented. The remaining components of pension/post-retirement expense, primarily current period service and interest costs and expected return on plan assets, will continue to be recorded on a quarterly basis. The cumulative effect of the retrospective application of new accounting policies was a decrease of $1.5 billion in retained earnings and a corresponding decrease in accumulated other comprehensive losses as of the beginning of fiscal 2014.
	In addition to the above mentioned accounting policy changes, the Company also changed the way in which it allocates the elements of net periodic pension (benefit) cost to its reportable segments to be aligned with changes in how the Company's chief operating decision maker evaluates segment performance. Historically, total net periodic pension (benefit) cost, including the amortization of deferred actuarial losses/(gains) and changes in fair value of plan assets, were reported within operating income, as defined by the Company, and fully allocated to reportable segments. Under the new allocation approach, net actuarial gains and losses as well as settlement gain and losses components of the net periodic pension (benefit) cost are excluded entirely from the Company’s definition of operating income and not allocated to the reportable segments. All of the other elements of net periodic pension (benefit)/cost, excluding actuarial gains and losses and settlement gains and losses, will continue to be included within operating income of the Company’s reportable segments. The Company has applied the change in the allocation approach retrospectively, adjusting segment reporting for all prior periods presented (see Note 15).
	The following tables present the effects of retrospectively applying the change in the pension accounting policies, on select line items of the accompanying unaudited Consolidated Condensed Financial Statements:
	Impact on Consolidated Condensed Statements of Operations
		Quarter ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	2,299		$	2,530			$	231
	Selling, general and administrative expenses	333			356				23
	Loss from continuing operations, before taxes	(164		)	(418		)		(254		)
	Taxes on income	6			(105		)		(111		)
	Loss from continuing operations	(170		)	(313		)		(143		)
	Net loss	(170		)	(313		)		(143		)
	Net loss attributable to CSC common stockholders	(171		)	(314		)		(143		)
	Basic EPS - Continuing operations	$	(1.22	)	$	(2.23	)		$	(1.01	)
	Diluted EPS - Continuing operations	$	(1.22	)	$	(2.23	)		$	(1.01	)
		Quarter ended December 27, 2013
		As previously reported			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	2,362		$	2,261			$	(101	)
	Selling, general & administrative expenses	354			318				(36		)
	Income from continuing operations, before taxes	221			358				137
	Taxes on income	70			77				7
	Income from continuing operations	151			281				130
	Net income	146			276				130
	Net income attributable to CSC common stockholders	141			271				130
	Basic EPS - Continuing operations	$	0.99		$	1.88			$	0.89
	Diluted EPS - Continuing operations	$	0.98		$	1.84			$	0.86
	Diluted EPS - Discontinued operations	$	(0.04	)	$	(0.03	)		$	0.01
		Nine months ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	6,907		$	7,101			$	194
	Selling, general and administrative expenses	1,028			1,046				18
	Income from continuing operations, before taxes	253			41				(212		)
	Taxes on income	118			18				(100		)
	Income from continuing operations	135			23				(112		)
	Net income	106			(6		)		(112		)
	Net income (loss) attributable to CSC common stockholders	95			(17		)		(112		)
	Basic EPS - Continuing operations	$	0.88		$	0.08			$	(0.80	)
	Diluted EPS - Continuing operations	$	0.86		$	0.08			$	(0.78	)
		Nine months ended December 27, 2013
		As previously reported			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	7,156		$	7,015			$	(141	)
	Selling, general and administrative expenses	962			920				(42		)
	Income from continuing operations, before taxes	648			831				183
	Taxes on income	206			227				21
	Income from continuing operations	442			604				162
	Loss from discontinued operations, net of taxes	72			91				19
	Net income	514			695				181
	Net income attributable to noncontrolling interest, net of tax	14			18				4
	Net income attributable to CSC common stockholders	500			677				177
	Basic EPS - Continuing operations	$	2.88		$	3.96			$	1.08
	Basic EPS - Discontinued Operations	$	0.49		$	0.61			$	0.12
	Diluted EPS - Continuing operations	$	2.83		$	3.88			$	1.05
	Diluted EPS - Discontinued operations	$	0.48		$	0.6			$	0.12
	Impact on Consolidated Condensed Statements of Comprehensive (Loss) Income
		Quarter ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions)								Increase/(Decrease)
	Net loss	$	(170	)	$	(313	)		$	(143	)
	Foreign currency translation adjustments	(78		)	(90		)		(12		)
Pension and other post-retirement benefit plans, net of taxes	(103		)	52				155
Other comprehensive loss, net of taxes	(183		)	(40		)		143
	Quarter ended December 27, 2013
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income	$	146		$	276			$	130
Foreign currency translation adjustments	(3		)	(9		)		(6		)
Pension and other post-retirement benefit plans, net of taxes	399			260				(139		)
Other comprehensive income, net of taxes	396			251				(145		)
Comprehensive income	542			527				(15		)
Comprehensive income attributable to noncontrolling interest	5			5				—
Comprehensive income attributable to CSC common stockholders	537			522				(15		)
	Nine months ended January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income (loss)	$	106		$	(6	)		$	(112	)
Foreign currency translation adjustments	(168		)	(189		)		(21		)
Pension and other post-retirement benefit plans, net of taxes	(85		)	48				133
Other comprehensive loss, net of taxes	(261		)	(149		)		112
	Nine months ended December 27, 2013
	As previously reported			As Reported			Impact of change in accounting method
(Amounts in millions)							Increase/(Decrease)
Net income	$	514		695			$	181
Foreign currency translation adjustments	(90		)	(93	)		(3		)
Pension and other post-retirement benefit plans, net of taxes	460			260			(200		)
Other comprehensive income, net of taxes	370			167			(203		)
Comprehensive income	884			862			(22		)
Comprehensive income attributable to noncontrolling interest	18			27			9
Comprehensive income attributable to CSC common stockholders	866			835			(31		)
Impact on Consolidated Condensed Balance Sheets
	As of January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Earnings retained for use in business	$	2,402		$	1,101			$	(1,301	)
Accumulated other comprehensive (loss) income	(1,159		)	141				1,300
Noncontrolling interest in subsidiaries	24			25				1
	As of March 28, 2014
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Earnings retained for use in business	$	2,770		$	1,592			$	(1,178	)
Accumulated other comprehensive (loss) income	(898		)	279				1,177
Noncontrolling interest in subsidiaries	31			32				1
Impact on Consolidated Condensed Statements of Cash Flows
	Nine months ended January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income (loss)	$	106		$	(6	)		$	(112	)
Pension & OPEB actuarial & settlement losses (gains)	—			463				463
Decrease in liabilities	(130		)	(481		)		(351		)
	Nine months ended December 27, 2013
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income	$	514		$	695			$	181
Pension & OPEB actuarial & settlement losses (gains)	—			(114		)		(114		)
Gain on dispositions	(83		)	(95		)		(12		)
Decrease in liabilities	(358		)	(413		)		(55		)
Recent Accounting Pronouncements
New Accounting Standards
During the first nine months of fiscal 2015, the Company adopted the following Accounting Standard Update (ASU):
In February 2013, the Financial Accounting Standards Board (FASB) issued ASU No. 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for which the Total Amount of the Obligation Is Fixed at the Reporting Date” (ASU 2013-04). ASU 2013-04 requires an entity to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date, as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. The guidance in ASU 2013-04 also requires an entity to disclose the nature and amount of the obligation as well as other information about those obligations. The amendments in ASU 2013-04 are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. Effective March 29, 2014, CSC adopted the amendments in ASU 2013-04 and determined that they did not have a material effect on CSC’s Consolidated Condensed Financial Statements.
Standards Issued But Not Yet Effective
The following ASUs were recently issued but have not yet been adopted by CSC:
In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern” (ASU 2014-15). ASU 2014-15 is intended to define management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. This ASU provides guidance to an organization’s management, with principles and definitions that are intended to reduce diversity in the timing and content of disclosures that are commonly provided by organizations today in the financial statement footnotes. The amendments are effective for annual periods ending after December 15, 2016, and interim periods within annual periods beginning after December 15, 2016. Early adoption is permitted for annual or interim reporting periods for which the financial statements have not previously been issued. ASU 2014-15 will be effective for CSC for fiscal 2017. CSC believes that the adoption of ASU 2014-15 will not have a material effect on CSC's Consolidated Condensed Financial Statements.
In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (ASU 2014-09). ASU 2014-09 supersedes the revenue recognition requirements in ASC Topic 605, “Revenue Recognition” and some cost guidance included in ASC Subtopic 605-35, Revenue Recognition - Construction-Type and Production-Type Contracts”. The core principle of ASU 2014-09 is that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which CSC expects to be entitled in exchange for those goods or services. ASU 2014-09 requires the disclosure of sufficient information to enable users of CSC’s financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. CSC will also be required to disclose information regarding significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. Early adoption is not allowed. ASU 2014-09 provides two methods of retrospective application. The first method would require CSC to apply ASU 2014-09 to each prior reporting period presented. The second method would require CSC to retrospectively apply with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application. ASU 2014-09 will be effective for CSC beginning in fiscal 2018. CSC is currently evaluating the impact that the adoption of ASU 2014-09 may have on CSC’s Consolidated Condensed Financial Statements.
In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity” (ASU 2014-08), which changes the requirements for reporting discontinued operations in Subtopic 205-20 “Presentation of Financial Statements - Discontinued Operations.” ASU 2014-08 changes the definition of discontinued operations by limiting discontinued operations reporting to disposals that represent strategic shifts that have (or will have) a major effect on an entity’s operations and financial results. Under current GAAP, many disposals, some of which may be routine in nature and not representative of a substantive change in an entity’s strategy, are reported in discontinued operations. ASU 2014-08 requires expanded disclosures for discontinued operations designed to provide users of financial statements with more information about the assets, liabilities, revenues, expenses and cash flows related to discontinued operations. ASU 2014-08 also requires an entity to disclose the pretax profit or loss of an individually significant component of an entity that does not qualify for discontinued operations reporting. The amendments in ASU 2014-08 are effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2014, which for CSC is beginning of fiscal 2016. Early adoption is permitted, but only for disposals (or classifications as held for sale) that have not been reported in financial statements previously issued or available for issuance. Adoption of this ASU is not expected to have a material effect on the Company's financial position.
In January 2014, the FASB issued ASU No. 2014-05, "Service Concession Arrangements (Topic 853) (a consensus of the FASB Emerging Issues Task Force)” (ASU 2014-05). ASU 2014-05 provides guidance on the accounting for service concession arrangements, which are arrangements between a public-sector entity grantor and an operating entity under which the operating entity operates the grantor’s infrastructure (e.g. airports, roads, or bridges). The operating entity also may provide the construction, upgrading, or maintenance services of the grantor’s infrastructure. ASU 2014-05 specifies that an operating entity should not account for a service concession arrangement that is within the scope of this ASU as a lease in accordance with Topic 840, "Leases." ASU 2014-05 also specifies that the infrastructure used in a service concession arrangement should not be recognized as property, plant, and equipment of the operating entity. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2014. ASU 2014-05 will be effective for CSC beginning in fiscal 2016. CSC believes that the adoption of ASU 2014-05 will not have a material effect on CSC's Consolidated Condensed Financial Statements.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	9 Months Ended
	Jan. 02, 2015
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	Defined Benefit Pension Plan Accounting Policy Changes
	During the first quarter of fiscal 2015, the Company changed its accounting policy for the recognition of actuarial gains and losses for its defined benefit pension and other post-retirement benefit plans and the calculation of expected return on pension plan assets. Historically, the Company recognized actuarial gains and losses in excess of 10% of the greater of the market-related value of plan assets or the plans’ projected benefit obligations (the “corridor”) as a component of accumulated other comprehensive loss in its Consolidated Condensed Balance Sheets and, depending on the benefit plan, the Company amortized these gains and losses to earnings either over the remaining average service period for the active participants or over the average remaining life expectancy of the inactive participants. Additionally, for the Company’s U.S. plans and the Australian plan, the Company previously used a calculated value for the market-related valuation of pension plan assets, reflecting changes in the fair value of plan assets over a three-year and a one-year period, respectively. Under the Company’s new accounting policies, the Company recognizes changes in actuarial gains and losses and the changes in fair value of plan assets in earnings at the time of plan remeasurement, annually during the fourth quarter of each year, or if there is an interim remeasurement, as a component of net periodic (benefit)/cost (and the Company no longer applies a corridor and, therefore, no longer defers any gains or losses) . The new accounting policies result in the changes in actuarial gains and losses and the changes in fair value of plan assets being recognized in earnings in the year they occur, rather than amortized over time, and therefore recognized earlier than under the Company’s previous methods of accounting. The Company believes the new pension accounting policies are preferable as they recognize the effects of plan investment performance, interest rate changes, and changes in actuarial assumptions as a component of earnings in the year in which they occur rather than amortized over time, and additionally, conform all plans to a consistent policy for determining market-related value of plan assets. These changes have been reported through retrospective application of the new accounting methods to all periods presented. The remaining components of pension/post-retirement expense, primarily current period service and interest costs and expected return on plan assets, will continue to be recorded on a quarterly basis. The cumulative effect of the retrospective application of new accounting policies was a decrease of $1.5 billion in retained earnings and a corresponding decrease in accumulated other comprehensive losses as of the beginning of fiscal 2014.
	In addition to the above mentioned accounting policy changes, the Company also changed the way in which it allocates the elements of net periodic pension (benefit) cost to its reportable segments to be aligned with changes in how the Company's chief operating decision maker evaluates segment performance. Historically, total net periodic pension (benefit) cost, including the amortization of deferred actuarial losses/(gains) and changes in fair value of plan assets, were reported within operating income, as defined by the Company, and fully allocated to reportable segments. Under the new allocation approach, net actuarial gains and losses as well as settlement gain and losses components of the net periodic pension (benefit) cost are excluded entirely from the Company’s definition of operating income and not allocated to the reportable segments. All of the other elements of net periodic pension (benefit)/cost, excluding actuarial gains and losses and settlement gains and losses, will continue to be included within operating income of the Company’s reportable segments. The Company has applied the change in the allocation approach retrospectively, adjusting segment reporting for all prior periods presented (see Note 15).
	The following tables present the effects of retrospectively applying the change in the pension accounting policies, on select line items of the accompanying unaudited Consolidated Condensed Financial Statements:
	Impact on Consolidated Condensed Statements of Operations
		Quarter ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	2,299		$	2,530			$	231
	Selling, general and administrative expenses	333			356				23
	Loss from continuing operations, before taxes	(164		)	(418		)		(254		)
	Taxes on income	6			(105		)		(111		)
	Loss from continuing operations	(170		)	(313		)		(143		)
	Net loss	(170		)	(313		)		(143		)
	Net loss attributable to CSC common stockholders	(171		)	(314		)		(143		)
	Basic EPS - Continuing operations	$	(1.22	)	$	(2.23	)		$	(1.01	)
	Diluted EPS - Continuing operations	$	(1.22	)	$	(2.23	)		$	(1.01	)
		Quarter ended December 27, 2013
		As previously reported			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	2,362		$	2,261			$	(101	)
	Selling, general & administrative expenses	354			318				(36		)
	Income from continuing operations, before taxes	221			358				137
	Taxes on income	70			77				7
	Income from continuing operations	151			281				130
	Net income	146			276				130
	Net income attributable to CSC common stockholders	141			271				130
	Basic EPS - Continuing operations	$	0.99		$	1.88			$	0.89
	Diluted EPS - Continuing operations	$	0.98		$	1.84			$	0.86
	Diluted EPS - Discontinued operations	$	(0.04	)	$	(0.03	)		$	0.01
		Nine months ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	6,907		$	7,101			$	194
	Selling, general and administrative expenses	1,028			1,046				18
	Income from continuing operations, before taxes	253			41				(212		)
	Taxes on income	118			18				(100		)
	Income from continuing operations	135			23				(112		)
	Net income	106			(6		)		(112		)
	Net income (loss) attributable to CSC common stockholders	95			(17		)		(112		)
	Basic EPS - Continuing operations	$	0.88		$	0.08			$	(0.80	)
	Diluted EPS - Continuing operations	$	0.86		$	0.08			$	(0.78	)
		Nine months ended December 27, 2013
		As previously reported			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	7,156		$	7,015			$	(141	)
	Selling, general and administrative expenses	962			920				(42		)
	Income from continuing operations, before taxes	648			831				183
	Taxes on income	206			227				21
	Income from continuing operations	442			604				162
	Loss from discontinued operations, net of taxes	72			91				19
	Net income	514			695				181
	Net income attributable to noncontrolling interest, net of tax	14			18				4
	Net income attributable to CSC common stockholders	500			677				177
	Basic EPS - Continuing operations	$	2.88		$	3.96			$	1.08
	Basic EPS - Discontinued Operations	$	0.49		$	0.61			$	0.12
	Diluted EPS - Continuing operations	$	2.83		$	3.88			$	1.05
	Diluted EPS - Discontinued operations	$	0.48		$	0.6			$	0.12
	Impact on Consolidated Condensed Statements of Comprehensive (Loss) Income
		Quarter ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions)								Increase/(Decrease)
	Net loss	$	(170	)	$	(313	)		$	(143	)
	Foreign currency translation adjustments	(78		)	(90		)		(12		)
Pension and other post-retirement benefit plans, net of taxes	(103		)	52				155
Other comprehensive loss, net of taxes	(183		)	(40		)		143
	Quarter ended December 27, 2013
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income	$	146		$	276			$	130
Foreign currency translation adjustments	(3		)	(9		)		(6		)
Pension and other post-retirement benefit plans, net of taxes	399			260				(139		)
Other comprehensive income, net of taxes	396			251				(145		)
Comprehensive income	542			527				(15		)
Comprehensive income attributable to noncontrolling interest	5			5				—
Comprehensive income attributable to CSC common stockholders	537			522				(15		)
	Nine months ended January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income (loss)	$	106		$	(6	)		$	(112	)
Foreign currency translation adjustments	(168		)	(189		)		(21		)
Pension and other post-retirement benefit plans, net of taxes	(85		)	48				133
Other comprehensive loss, net of taxes	(261		)	(149		)		112
	Nine months ended December 27, 2013
	As previously reported			As Reported			Impact of change in accounting method
(Amounts in millions)							Increase/(Decrease)
Net income	$	514		695			$	181
Foreign currency translation adjustments	(90		)	(93	)		(3		)
Pension and other post-retirement benefit plans, net of taxes	460			260			(200		)
Other comprehensive income, net of taxes	370			167			(203		)
Comprehensive income	884			862			(22		)
Comprehensive income attributable to noncontrolling interest	18			27			9
Comprehensive income attributable to CSC common stockholders	866			835			(31		)
Impact on Consolidated Condensed Balance Sheets
	As of January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Earnings retained for use in business	$	2,402		$	1,101			$	(1,301	)
Accumulated other comprehensive (loss) income	(1,159		)	141				1,300
Noncontrolling interest in subsidiaries	24			25				1
	As of March 28, 2014
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Earnings retained for use in business	$	2,770		$	1,592			$	(1,178	)
Accumulated other comprehensive (loss) income	(898		)	279				1,177
Noncontrolling interest in subsidiaries	31			32				1
Impact on Consolidated Condensed Statements of Cash Flows
	Nine months ended January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income (loss)	$	106		$	(6	)		$	(112	)
Pension & OPEB actuarial & settlement losses (gains)	—			463				463
Decrease in liabilities	(130		)	(481		)		(351		)
	Nine months ended December 27, 2013
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income	$	514		$	695			$	181
Pension & OPEB actuarial & settlement losses (gains)	—			(114		)		(114		)
Gain on dispositions	(83		)	(95		)		(12		)
Decrease in liabilities	(358		)	(413		)		(55		)
Recent Accounting Pronouncements
New Accounting Standards
During the first nine months of fiscal 2015, the Company adopted the following Accounting Standard Update (ASU):
In February 2013, the Financial Accounting Standards Board (FASB) issued ASU No. 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for which the Total Amount of the Obligation Is Fixed at the Reporting Date” (ASU 2013-04). ASU 2013-04 requires an entity to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date, as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. The guidance in ASU 2013-04 also requires an entity to disclose the nature and amount of the obligation as well as other information about those obligations. The amendments in ASU 2013-04 are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. Effective March 29, 2014, CSC adopted the amendments in ASU 2013-04 and determined that they did not have a material effect on CSC’s Consolidated Condensed Financial Statements.
Standards Issued But Not Yet Effective
The following ASUs were recently issued but have not yet been adopted by CSC:
In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern” (ASU 2014-15). ASU 2014-15 is intended to define management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. This ASU provides guidance to an organization’s management, with principles and definitions that are intended to reduce diversity in the timing and content of disclosures that are commonly provided by organizations today in the financial statement footnotes. The amendments are effective for annual periods ending after December 15, 2016, and interim periods within annual periods beginning after December 15, 2016. Early adoption is permitted for annual or interim reporting periods for which the financial statements have not previously been issued. ASU 2014-15 will be effective for CSC for fiscal 2017. CSC believes that the adoption of ASU 2014-15 will not have a material effect on CSC's Consolidated Condensed Financial Statements.
In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (ASU 2014-09). ASU 2014-09 supersedes the revenue recognition requirements in ASC Topic 605, “Revenue Recognition” and some cost guidance included in ASC Subtopic 605-35, Revenue Recognition - Construction-Type and Production-Type Contracts”. The core principle of ASU 2014-09 is that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which CSC expects to be entitled in exchange for those goods or services. ASU 2014-09 requires the disclosure of sufficient information to enable users of CSC’s financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. CSC will also be required to disclose information regarding significant judgments and changes in judgments, and assets recognized from costs incurred to obtain or fulfill a contract. Early adoption is not allowed. ASU 2014-09 provides two methods of retrospective application. The first method would require CSC to apply ASU 2014-09 to each prior reporting period presented. The second method would require CSC to retrospectively apply with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application. ASU 2014-09 will be effective for CSC beginning in fiscal 2018. CSC is currently evaluating the impact that the adoption of ASU 2014-09 may have on CSC’s Consolidated Condensed Financial Statements.
In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity” (ASU 2014-08), which changes the requirements for reporting discontinued operations in Subtopic 205-20 “Presentation of Financial Statements - Discontinued Operations.” ASU 2014-08 changes the definition of discontinued operations by limiting discontinued operations reporting to disposals that represent strategic shifts that have (or will have) a major effect on an entity’s operations and financial results. Under current GAAP, many disposals, some of which may be routine in nature and not representative of a substantive change in an entity’s strategy, are reported in discontinued operations. ASU 2014-08 requires expanded disclosures for discontinued operations designed to provide users of financial statements with more information about the assets, liabilities, revenues, expenses and cash flows related to discontinued operations. ASU 2014-08 also requires an entity to disclose the pretax profit or loss of an individually significant component of an entity that does not qualify for discontinued operations reporting. The amendments in ASU 2014-08 are effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2014, which for CSC is beginning of fiscal 2016. Early adoption is permitted, but only for disposals (or classifications as held for sale) that have not been reported in financial statements previously issued or available for issuance. Adoption of this ASU is not expected to have a material effect on the Company's financial position.
In January 2014, the FASB issued ASU No. 2014-05, "Service Concession Arrangements (Topic 853) (a consensus of the FASB Emerging Issues Task Force)” (ASU 2014-05). ASU 2014-05 provides guidance on the accounting for service concession arrangements, which are arrangements between a public-sector entity grantor and an operating entity under which the operating entity operates the grantor’s infrastructure (e.g. airports, roads, or bridges). The operating entity also may provide the construction, upgrading, or maintenance services of the grantor’s infrastructure. ASU 2014-05 specifies that an operating entity should not account for a service concession arrangement that is within the scope of this ASU as a lease in accordance with Topic 840, "Leases." ASU 2014-05 also specifies that the infrastructure used in a service concession arrangement should not be recognized as property, plant, and equipment of the operating entity. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2014. ASU 2014-05 will be effective for CSC beginning in fiscal 2016. CSC believes that the adoption of ASU 2014-05 will not have a material effect on CSC's Consolidated Condensed Financial Statements.

Acquisitions_And_Divestitures

Acquisitions And Divestitures	9 Months Ended
	Jan. 02, 2015
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures
	Fiscal 2015 Acquisition
	On July 31, 2014, CSC acquired a privately held entity for $35 million in an all cash transaction. CSC acquired this entity primarily to enhance its cyber security, systems engineering, and software development service offerings in the federal intelligence sector. The purchase price was allocated to assets acquired and liabilities assumed based on preliminary estimates of fair value at the date of acquisition, as follows: $4 million to current assets, $9 million to an intangible asset other than goodwill, $9 million to current liabilities, and $31 million to goodwill. The intangible asset, which is associated with customer relationships and government programs, will be amortized over 15 years. The goodwill is associated with the Company's North American Public Sector (NPS) segment and is expected to be tax deductible. Pro forma financial information for this acquisition is not presented as the effects of the acquisition are not material to CSC's consolidated results. The allocation of purchase price is preliminary and is subject to additional information related to the liabilities that existed as of the acquisition date.
	Fiscal 2014 Acquisitions
	ServiceMesh Acquisition
	On November 15, 2013, CSC acquired ServiceMesh Inc. (ServiceMesh or SMI), a privately-held cloud services management company, headquartered in Santa Monica, California, with operations in the United States, Australia and the United Kingdom, for total purchase consideration of $282 million. The acquisition enhances CSC's ability to help its clients migrate their applications into cloud computing environments and to automate the deployment and management of enterprise applications and platforms across private, public and hybrid cloud environments.
	The purchase consideration included: 1) cash of $163 million paid at closing to and on behalf of the ServiceMesh shareholders, including $10 million paid to retire ServiceMesh's debt, and 2) additional consideration of $119 million contingent on the achievement of contractually agreed revenue targets. The Company incurred transaction costs of $4 million associated with this acquisition, which are included within selling, general and administrative expenses. The acquisition was funded from CSC's cash on hand at the time.
	The amount of contingent consideration was based on a contractually defined multiple of ServiceMesh’s revenues during a specified period ending January 31, 2014. The Company determined the fair value of the contingent consideration payable using a probability-weighted approach, which at the end of the third quarter of fiscal 2014 was preliminarily estimated to be $137 million, representing the maximum amount of contingent consideration payable. During the fourth quarter, the Company reduced the fair value of the contingent consideration payable and goodwill by $18 million, based on additional facts and circumstances that existed as of the acquisition date but which were not known until the fourth quarter. These facts, had they been known, would have reduced the Company's original acquisition-date estimate of the fair value of contingent consideration to $119 million.
	After the expiration of the contractual period, the final amount of the contingent consideration payable was determined to be $98 million, which was paid during the fourth quarter of fiscal 2014. The difference of $21 million, between the revised fair value of contingent consideration liability of $119 million and the actual amount paid of $98 million, was primarily due to the deferral of revenues related to certain software license sales to periods beyond the specified earn-out measurement period. This difference of $21 million was recorded as a reduction to selling, general and administrative expenses during the fourth quarter of fiscal 2014.
	The results of ServiceMesh are included in the Company's consolidated financial statements within its GIS segment.
	The allocation of the purchase consideration to the assets acquired and liabilities assumed, including the fourth quarter adjustments to the estimated fair value of contingent consideration, is presented below:
	(Amounts in millions)		Estimated Fair Value
	Accounts receivable and other current assets		$	3
	Deferred tax assets		31
	Intangible asset - developed technology		94
	Intangible assets - customer relationships and trade names		10
	Property and equipment and other non-current assets		2
	Deferred revenue and other current liabilities		(4		)
	Deferred tax liabilities		(38		)
	Total identifiable net assets acquired		98
	Goodwill		$	184
	Total purchase consideration		$	282
	As of the acquisition date, the fair value of trade receivables approximated book value and are considered fully recoverable. The Company’s purchase price allocation was finalized in the third quarter of fiscal 2015.
	The amortizable lives associated with the intangible assets acquired are as follows:
	Description	Estimated Useful Lives (Years)
	Developed technology	9
	Customer relationships	3
	Trade names	6-Apr
	The goodwill recognized in the acquisition is attributable to the intellectual capital, the acquired assembled work force, and expected cost synergies, none of which qualify for recognition as a separate intangible asset. The goodwill arising from the acquisition was preliminarily allocated to the Company's reportable segments based on the relative fair value of the expected incremental cash flows that the acquisition is expected to provide to each reporting unit within the Company's reportable segments. As of March 28, 2014, goodwill was allocated as follows: GBS: $28 million, GIS: $120 million, and NPS: $36 million. The goodwill is not deductible for tax purposes.
	In connection with the ServiceMesh acquisition, the Company granted to certain ServiceMesh employees restricted stock units with a grant-date fair value of $41 million. These awards generally vest over a three-year period, associated with the continuing employment of the ServiceMesh employees, beginning from the date of acquisition, and are recorded as compensation expense ratably over the three-year period.
	Infochimps Acquisition
	On August 5, 2013, CSC acquired Infochimps, Inc. (Infochimps), a privately-held company, in an all-cash transaction for $27 million. The acquisition complements CSC’s existing Big Data business by providing a flexible, scalable, platform-as-a-service offering. The purchase price has been allocated to assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition: $2 million to current and other long-term assets, $2 million to current and long-term liabilities, and $27 million to goodwill. As of the acquisition date, the fair value of trade receivables approximated book value and was considered fully recoverable. The goodwill is associated with the Company's GBS segment and is not tax-deductible.
	Pro forma financial information for the fiscal 2014 acquisitions was not presented as the effects of the acquisitions were not material to CSC's consolidated results.
	Fiscal 2015 Divestiture
	On July 31, 2014, CSC completed the sale of a German software business to a strategic investor for cash consideration of $3 million. This divestiture, which was a part of the GBS segment's healthcare group, resulted in a pre-tax loss of $22 million, representing the excess of the carrying value of the net assets of the business and transaction costs over the net proceeds. The divested assets and liabilities included: current assets of $54 million (including $21 million of cash); goodwill of $0; other noncurrent assets of $25 million; current liabilities of $33 million; and noncurrent liabilities of $23 million. The historical results of this business have been presented as discontinued operations in the Company's unaudited Consolidated Condensed Statement of Operations.
	Fiscal 2014 Divestitures
	On July 19, 2013, CSC's NPS segment completed the sale of its base operations, aviation and range services business unit, Applied Technology Division (ATD), to a strategic investor for cash consideration of approximately $178 million, plus a net working capital adjustment receivable of $6 million, for a pre-tax gain on disposal of $77 million. During the first quarter of fiscal 2015, NPS recorded a $1 million final net working capital adjustment, which reduced the total gain on sale of ATD.
	On May 21, 2013, CSC completed the divestiture of its flood insurance-related business process outsourcing practice (flood insurance BPO) to a financial investor for cash consideration of $43 million plus a net working capital adjustment of $4 million, for a pre-tax gain on disposal of $25 million. During the fourth quarter of fiscal 2014, the Company received cash of $3 million, representing the final net working capital adjustment, and reduced the gain on disposal by $1 million. During the first quarter of fiscal 2015, CSC received an additional $2 million as a purchase price adjustment related to this divestiture, which was recorded as additional gain on sale on disposition.
	Pursuant to the pension accounting policy change (see Note 2), the income from discontinued operations, net of taxes, for the third quarter and first nine months of fiscal 2014 increased by $0 million and $19 million, respectively, due to the reduced pension expense.
	A summary of the results of the discontinued operations is presented below:
			Quarter Ended						Nine Months Ended
			January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Operations
	Revenue		$	—		$	7		$	10		$	227
	(Loss) income from discontinued operations, before taxes		—			(2		)	(11		)	10
	Tax expense		—			1			—			6
	Net (loss) income from discontinued operations		$	—		$	(3	)	$	(11	)	$	4
	Disposal
	(Loss) gain on disposition, before taxes		$	—		$	(2	)	$	(21	)	$	102
	Tax (benefit) expense		—			—			(3		)	15
	(Loss) gain on disposition, net of taxes		$	—		$	(2	)	$	(18	)	$	87
	(Loss) income from discontinued operations, net of taxes		$	—		$	(5	)	$	(29	)	$	91

Investigations_and_Out_of_Peri

Investigations and Out of Period Adjustments	9 Months Ended
	Jan. 02, 2015
Out of period adjustments [Abstract]
Investigations and Out of Period Adjustments	Investigations and Out of Period Adjustments
	Summary of Audit Committee and SEC Investigations Related to the Out of Period Adjustments
	As previously disclosed, on January 28, 2011, the Company was notified by the Division of Enforcement of the SEC that it had commenced a formal civil investigation. That investigation covered a range of matters as previously disclosed by the Company, including certain of the Company’s prior disclosures and accounting determinations. On May 2, 2011, the Audit Committee of the Board of Directors of the Company (the Audit Committee) commenced an independent investigation. The Audit Committee retained independent counsel to represent the Company on behalf of, and under the exclusive direction of, the Audit Committee in connection with such independent investigation. Independent counsel retained forensic accountants and disclosure experts to assist with their work. The Audit Committee determined in August 2012 that its independent investigation was complete. The Audit Committee instructed its independent counsel to cooperate with the SEC's Division of Enforcement by completing production of documents and providing any further information requested by the SEC's Division of Enforcement.
	As a result of findings by the Audit Committee’s independent investigation, the Company has previously acknowledged certain historic errors and irregularities relating to accounting entries arising from the Nordics region, Australia, and the Company’s contractual relationship with the NHS, self-reported these errors and irregularities to the SEC’s Division of Enforcement, and made adjustments to its financial statements that are related to prior periods as reported in its past filings. In addition, as previously disclosed, certain personnel in certain foreign operations were reprimanded, suspended, terminated and/or resigned and additional controls were implemented. Based on recommendations from the Audit Committee’s independent investigation, the Company also instituted comprehensive enhancements beginning in 2011 to its compliance, financial and disclosure controls, and to the function of internal audit. In doing so, the Company made significant changes to prevent the type of misconduct identified by the Audit Committee’s independent investigation from recurring. The Company previously took significant steps to enhance its compliance culture and to remediate any deficiencies through: (1) Company-wide communications concerning the Company’s key organizational values of ethics, compliance and integrity; (2) strengthening internal controls and processes to further ensure the accuracy and integrity of the Company’s financial reporting; (3) improving technical training for employees in finance and accounting roles; (4) a restructuring of the internal audit group and the outsourcing of many internal audit activities to Ernst & Young to enhance the quality and scalability of the Company’s overall internal audit function; (5) creating an independent investigations unit at the Company to investigate suspected violations of the law or the Company's Code of Conduct; (6) elevating the position of Chief Compliance and Ethics Officer to provide direct reporting to the Audit Committee; (7) creating a new position of Chief Accounting Officer responsible for developing accounting policies and reviewing complex technical accounting issues; and (8) revising policies and procedures concerning percentage-of-completion (POC) accounting to enhance the review and monitoring of long-term contracts, including those contracts similar to the contract with NHS.
	The Company has been in continuing discussions with the SEC’s staff concerning a potential resolution of the SEC’s investigation. Many of those discussions have concerned the Company’s prior use in fiscal 2009-2012 of the terms of ongoing NHS contract negotiations in developing its assumptions and judgments with respect to the margin used in recognizing profit under the POC accounting method and in evaluating the recoverability of NHS contract assets as well as the Company’s prior disclosures concerning such matters.
	As previously disclosed, the Company has reached an understanding with the staff of the SEC regarding a settlement. Based on that understanding, the SEC will file an administrative enforcement action alleging violations of the antifraud, reporting, and books-and-records provisions of the U.S. securities laws. The Company would neither admit nor deny the allegations, but would agree to cease-and-desist from committing or causing any violations or future violations of those provisions.
	Pursuant to this understanding, the Company intends to restate its financial statements for fiscal 2012 and its summary financial results for fiscal 2011 and fiscal 2010 reflected in the five-year selected financial data table, all as set forth in CSC’s Form 10-K for the fiscal year ended March 28, 2014. The restatement will have no impact on the Company’s financial statements for fiscal 2013 or fiscal 2014 or the first, second or third quarters of fiscal 2015. Subject to formal SEC authorization of the proposed settlement, CSC intends to file its Form 10-K/A for the fiscal year ended March 28, 2014 reflecting the restatement as soon as practicable thereafter. The Board of Directors of the Company determined that the Company's previously issued consolidated financial statements for fiscal 2009-2012 (including the associated auditors' reports and the interim periods within those years) should no longer be relied upon.
	The restatement will reflect the Company's acknowledgment that there were accounting errors in fiscal 2009-2012 with respect to certain assumptions under the POC accounting method for the NHS contract. As part of the restatement, the Company will revise those assumptions based upon uncertainty with respect to a range of possible final outcomes under the NHS contract. As a result, the Company will revise the accounting based on the impracticality of estimating a specific level of profit during this period in order to reflect a profit margin of zero under the POC accounting rules. The result is that approximately $130 million of operating profit is no longer recognized in prior years, thereby reducing the impairment charge previously recorded in fiscal 2012 by approximately that same amount.
	Further, as part of the settlement discussions, the SEC’s staff has advised the Company that it has concluded that the Company should have recorded the previously disclosed impairment charge related to the NHS contract in fiscal 2011 instead of fiscal 2012. The Company’s restatement accordingly will reflect an impairment charge of approximately $1.16 billion in fiscal 2011, reducing the impairment charge previously recognized in fiscal 2012. Due to this modification, the Company also will move $2.51 billion of the previously disclosed fiscal 2012 goodwill impairment charge of approximately $2.75 billion to fiscal 2011.
	The anticipated result of the restatement is to reduce net income by approximately $50 million in fiscal 2010 and approximately $3.69 billion in fiscal 2011 and to increase net income in fiscal 2012 by approximately $3.90 billion.
	As part of the Company’s understanding with the staff of the SEC regarding terms of the settlement, the Company also has agreed to pay a penalty of $190 million and to implement a review of its compliance policies through an independent compliance consultant. The Company has recorded a pre-tax charge of approximately $195 million for the penalty and related expenses in its third quarter of fiscal 2015.
	Final resolution of these matters is subject to the preparation and negotiation of documentation satisfactory to the Company and the SEC, including formal authorization by the SEC. If we do not reach final settlement on the expected terms or if the necessary approvals do not occur, either we may enter into further discussions with the SEC to resolve the matters under investigation on different terms and conditions or we may litigate the matters. We cannot predict the timing or terms of any such further discussions or resolution or the outcome of any subsequent litigation with the government, but any such resolution or outcome could have an adverse impact on the Company's reputation, business, financial condition, results of operation or cash flows.
	Out of Period Adjustments Financial Impact Summary
	The rollover impact on the pre-tax income (loss) from continuing operations of the recorded out of period adjustments in the first nine months of fiscal 2015, fiscal 2014 and fiscal 2013 is attributable to the following prior fiscal years:
			Increase/(Decrease)
	(Amounts in millions)		Fiscal 2013 Adjustments				Fiscal 2014 Adjustments			First Nine Months Fiscal 2015 Adjustments			Total Adjustments
	Fiscal 2015		$	—			$	—		$	(12	)	$	(12	)
	Fiscal 2014		—				(2		)	13			11
	Fiscal 2013		6				4			(1		)	9
	Prior fiscal years (unaudited)		(6		)		(2		)	—			(8		)
	See Note 15 for a summary of the effect of the pre-tax out of period adjustments on the Company's segment results for the quarters ended January 2, 2015 and December 27, 2013, respectively.
	Fiscal 2015 Adjustments
	During the quarter and nine months ended January 2, 2015, the Company identified and recorded net adjustments increasing pre-tax income from continuing operations by $4 million and $12 million, respectively, that should have been recorded in prior periods.
	The $4 million increase in pre-tax income from continuing operations recorded during the third quarter of fiscal 2015 was primarily attributable to adjustments decreasing cost of services and increasing revenue that should have been recorded primarily in the first half of fiscal 2015. Out of period adjustments identified during the second and third quarters of fiscal 2015 that should have been recorded in prior fiscal years were not material. The Company also recorded a net tax benefit of $6 million, primarily the impact of discrete tax adjustments, in the current quarter. Adjustments recorded during the quarter ended January 2, 2015 increased net income attributable to CSC common stockholders by $10 million.
	The $12 million increase in pre-tax income from continuing operations recorded during the first nine months of fiscal 2015 primarily included lower fiscal 2014 variable compensation partially offset by certain adjustments related to cost of services that were identified late in the 2014 year-end close process and, therefore, were not included in the Company's fiscal 2014 Consolidated Financial Statements. The Company also recorded a net tax benefit of $5 million, primarily the impact of discrete tax adjustments partially offset by the tax effects of out period adjustments, in the nine months ended January 2, 2015. Adjustments recorded during the nine months ended January 2, 2015, that should have been recorded in prior fiscal years, increased net income attributable to CSC common stockholders by $15 million.
	The impact of out of period adjustments recorded during fiscal 2015 on select line items of the unaudited Consolidated Condensed Statements of Operations for the quarter and nine months ended January 2, 2015, using the rollover method, is shown below:
			Quarter Ended January 2, 2015
	(Amounts in millions, except per-share amounts)		As Reported				Adjustments			Amount Adjusted
							Increase/			for Removal
							(Decrease)			of Errors
	Revenue		$	2,947			$	(1	)	$	2,946
	Costs of services (excludes depreciation and amortization and restructuring costs)		2,530				3			2,533
	Selling, general and administrative		356				—			356
	Depreciation and amortization		238				—			238
	Restructuring costs		12				—			12
	Interest expense		37				—			37
	Interest income		(4		)		—			(4		)
	Other expense, net		1				—			1
	Income from continuing operations before taxes		(418		)		(4		)	(422		)
	Taxes on income		(105		)		6			(99		)
	Income (loss) from continuing operations		(313		)		(10		)	(323		)
	Loss from discontinued operations, net of taxes		—				—			—
	Net income (loss) attributable to CSC common stockholders		(314		)		(10		)	(324		)
	EPS – Diluted
	Continuing operations		$	(2.23	)		$	(0.07	)	$	(2.30	)
	Discontinued operations		—				—			—
	Total		$	(2.23	)		$	(0.07	)	$	(2.30	)
			Nine Months Ended January 2, 2015
	(Amounts in millions, except per-share amounts)		As Reported				Adjustments			Amount Adjusted
							Increase/			for Removal
							(Decrease)			of Errors
	Revenue		$	9,264			$	9		$	9,273
	Costs of services (excludes depreciation and amortization and restructuring costs)		7,101				22			7,123
	Selling, general and administrative		1,046				—			1,046
	Depreciation and amortization		762				(1		)	761
	Restructuring costs		15				—			15
	Interest expense		112				—			112
	Other expense, net		6				—			6
	Income (loss) from continuing operations before taxes		41				(12		)	29
	Taxes on income		18				5			23
	Income from continuing operations		23				(17		)	6
	Loss from discontinued operations, net of taxes		(29		)		2			(27		)
	Net income (loss) attributable to CSC common stockholders		(17		)		(15		)	(32		)
	EPS – Diluted
Continuing operations		$	0.08			$	(0.12	)	$	(0.04	)
Discontinued operations		(0.20		)		0.01			(0.19		)
Total		$	(0.12	)		$	(0.11	)	$	(0.23	)
For the nine months ended January 2, 2015, the out of period impact on the unaudited Consolidated Condensed Balance Sheet of the adjustments included in income from continuing operations before taxes under the roll-over method is shown below:
(Amounts in million)		Increase/Decrease		January 2, 2015
Receivable, net of allowance for doubtful accounts		Increase		$	5
Property and Equipment		Decrease		1
Software, net of accumulated amortization		Decrease		2
Outsourcing contract costs, net of accumulated amortization		Increase		2
Other assets		Decrease		3
Accrued expenses and other current liabilities		Decrease		15
Deferred revenue and advance contract payments		Increase		4
The Company has determined that the impact of the consolidated out of period adjustments recorded in the nine months ended January 2, 2015 is immaterial to the consolidated results, financial position and cash flows for the third quarter and first nine months of fiscal 2015 and prior periods. Consequently, the cumulative effect of these adjustments was recorded during fiscal 2015.
Fiscal 2014 Adjustments
During the third quarter and through the first nine months of fiscal 2014, the Company recorded net pre-tax adjustments increasing income from continuing operations before taxes by $5 million and $3 million, respectively, that should have been recorded in prior fiscal years. The $5 million of pre-tax out of period adjustments consists of a $7 million increase to revenue (due to a $6 million adjustment to recognize revenue on previously delivered software products and services and a $1 million adjustment to recognize revenue on previously delivered outsourcing services), partially offset by a $2 million charge to cost of services (COS) (consisting of a $5 million increase to COS relating to previously delivered software products and services, offset by a $3 million decrease to COS as a result of a margin correction on long-term contracts accounted for under the POC method).
Adjustments, net of tax, during the third quarter of fiscal 2014 that should have been recorded in prior fiscal years increased income from continuing operations by $4 million. Adjustments, net of tax, during the first nine months of fiscal 2014 that should have been recorded in prior fiscal years decreased income from continuing operations by $18 million. The difference between the pre-tax and after tax impact is attributable to the tax effect of the net pre-tax adjustments, and net out of period adjustments to tax expense that should have been recorded in prior fiscal years. The tax effect on the net pre-tax adjustments for the third quarter was a $1 million increase to tax expense and for the first nine months of fiscal 2014 was a $9 million increase in tax expense. The tax effect on the pre-tax adjustments for the first nine months of fiscal 2014 resulted in a disproportionate increase in tax expense due to taxes on increases in income in taxable jurisdictions, and absence of tax benefits on decreases in income in jurisdictions with net operating loss carry forwards. The out of period adjustments to tax expense for the third quarter and first nine months of fiscal 2014 resulted in no change and an increase to income tax expense of $12 million, respectively. The out of period adjustments to tax expense for the nine months ended December 27, 2013, consist primarily of a $10 million increase in liabilities for uncertain tax positions associated with a tax restructuring of one of the Company's operating subsidiaries recorded during the second quarter of fiscal 2014.
In addition, during the third quarter of fiscal 2014, the Company recorded $7 million of pre-tax adjustments increasing income from continuing operations before taxes that should have been recorded in the first six months of fiscal 2014. The $7 million of pre-tax out of period adjustments consists primarily of a reduction of $7 million to COS (attributable to a $5 million reduction to accrued expenses, a $3 million reduction of costs related to a reversal of previously recognized software products and services, a $4 million pension accrual expense reduction, all partially offset by a $3 million reduction of margin on long-term contracts accounted for under the POC method, and a $2 million adjustment to recognize costs on previously delivered software products and services). In addition to the reduction to COS, a net $1 million adjustment was recorded to increase revenue on previously delivered software products and services and a $1 million increase in selling, general and administrative (SG&A) expenses was recognized related to a write-off of prepaid facility charges. Adjustments, net of tax, during the third quarter of fiscal 2014 increased income from continuing operations by $9 million that should have been recorded in the first six months of fiscal 2014. The difference between the pre-tax and after tax impact is attributable to the tax effect of the net pre-tax adjustments.
During the second quarter of fiscal 2014, the Company recorded net pre-tax adjustments decreasing income from continuing operations before taxes by $11 million that should have been recorded in prior fiscal years. The $11 million of pre-tax out of period adjustments consists of a $9 million reversal of revenue (due to deferral of revenue for undelivered elements on software contracts lacking vendor specific objective evidence and margin corrections on contracts under POC accounting), a $1 million charge to cost of sales for reversal of previously deferred costs and a $1 million charge to SG&A expense reversing excess capitalization associated with internal systems development. Adjustments, net of tax, during the second quarter of fiscal 2014 that should have been recorded in prior fiscal years decreased income from continuing operations by $20 million. The difference between the pre-tax and after tax impact is attributable to the tax effect of the net pre-tax adjustments, and net out of period adjustments to tax expense that should have been recorded in prior fiscal years. The tax effect on the net pre-tax adjustments for the second quarter of fiscal 2014 was negligible. The out of period adjustments to tax expense for the second quarter of fiscal 2014 resulted in an increase to income tax expense of $9 million. The out of period adjustments to tax expense consist primarily of a $10 million increase in liabilities for uncertain tax positions associated with a tax restructuring of one of the Company's operating subsidiaries.
In addition, during the second quarter of fiscal 2014, the Company recorded $17 million of pre-tax adjustments decreasing income from continuing operations before taxes that should have been recorded in the first quarter of fiscal 2014. The $17 million of pre-tax out of period adjustments consists of (1) a $13 million charge to cost of sales consisting of $6 million in adjustments to prepaid and accrued balances, a $4 million reversal of previously deferred costs and a $3 million reduction in work in process due to margin corrections on contracts under POC accounting; (2) a $3 million charge to SG&A expense primarily due to reversal of excess capitalization associated with internal systems development, partially offset by other adjustments; and (3) a $1 million charge to depreciation expense to correct the useful life for certain leasehold improvements. Adjustments, net of tax, during the second quarter of fiscal 2014 decreased income from continuing operations by $11 million that should have been recorded in the first quarter of fiscal 2014. The difference between the pre-tax and after tax impact is attributable to the tax effect of the net pre-tax adjustments.
During the first quarter of fiscal 2014, the Company identified and recorded net pre-tax adjustments increasing income from continuing operations before taxes by $9 million that should have been recorded in prior fiscal years. This net impact on income from continuing operations before taxes is comprised of the following:
•	net adjustments decreasing income from continuing operations before taxes by $13 million resulting primarily from revenues and costs in its GBS segment;
•	net adjustments increasing income from continuing operations before taxes by $8 million resulting from the correction of payroll expenses within its GBS segment; and
•	net adjustments increasing income from continuing operations before taxes by $14 million resulting primarily from adjustments identified by the Company late in the fiscal 2013 closing process.
Adjustments recorded during the first quarter of fiscal 2014 that should have been recorded in prior fiscal years decreased income from continuing operations by $2 million. The difference between the pre-tax and after tax impact is attributable to the tax effect of the adjustments described above, and $2 million of tax expense related to net adjustments that should have been recorded in prior periods.
During periods subsequent to December 27, 2013, the Company recorded out of period adjustments with a net pre-tax impact to income from continuing operations of $3 million, primarily in NPS, subsequent to December 27, 2013 that should have been recorded in the first nine months of fiscal 2014. Had such adjustments been recorded in the appropriate period, income from continuing operations before taxes for the first nine months of fiscal 2014 would have been higher by $3 million.
The impact of out of period adjustments recorded during fiscal 2014, and the first nine months of fiscal 2015, on select line items of the unaudited Consolidated Condensed Statements of Operations for the quarter and first nine months ended December 27, 2013, using the rollover method, is shown below:
		Quarter Ended December 27, 2013
(Amounts in millions, except per-share amounts)		As Reported				Adjustments			Amount Adjusted
						Increase/			for Removal
						(Decrease)			of Errors
Revenue		$	3,228			$	(5	)	$	3,223
Costs of services (excludes depreciation and amortization and restructuring costs)		2,261				8			2,269
Selling, general and administrative		318				(1		)	317
Depreciation and amortization		251				—			251
Restructuring costs		11				—			11
Interest expense		38				—			38
Interest income		(4		)		—			(4		)
Other (income) expense		(5		)		—			(5		)
Income from continuing operations before taxes		358				(12		)	346
Taxes on income		77				(4		)	73
Income from continuing operations		281				(8		)	273
Income from discontinued operations, net of taxes		(5		)		(3		)	(8		)
Net income attributable to CSC common stockholders		271				(11		)	260
EPS – Diluted
Continuing operations		$	1.84			$	(0.05	)	$	1.79
Discontinued operations		(0.03		)		(0.02		)	(0.05		)
Total		$	1.81			$	(0.07	)	$	1.74
		Nine Months Ended December 27, 2013
(Amounts in millions, except per-share amounts)		As Reported				Adjustments			Amount Adjusted
						Increase/			for Removal
						(Decrease)			of Errors
Revenue		$	9,669			$	17		$	9,686
Costs of services (excludes depreciation and amortization and restructuring costs)		7,015				16			7,031
Selling, general and administrative		920				—			920
Depreciation and amortization		753				(1		)	752
Restructuring costs		33				2			35
Interest expense		112				—			112
Other (income) expense		16				—			16
Income from continuing operations before taxes		831				—			831
Taxes on income		227				(24		)	203
Income from continuing operations		604				24			628
Income from discontinued operations, net of taxes		91				—			91
Net income attributable to CSC common stockholders		677				24			701
EPS – Diluted
Continuing operations		$	3.88			$	0.16		$	4.04
Discontinued operations		0.6				—			0.6
Total		$	4.48			$	0.16		$	4.64
For the nine months ended December 27, 2013, the out of period impact on the unaudited Consolidated Condensed Balance Sheet of the adjustments included in income from continuing operations before taxes under the roll-over method is shown below:
(Amounts in million)		Increase/Decrease		27-Dec-13
Receivable, net of allowance for doubtful accounts		Decrease		$	6
Prepaid expenses and other current assets		Increase		1
Property and Equipment		Decrease		1
Other assets		Increase		1
Accrued payroll and related costs		Decrease		9
Accrued expenses and other current liabilities		Decrease		18
Deferred revenue and advance contract payments		Increase		22
The Company determined that the impact of the consolidated out of period adjustments recorded in the third quarter of fiscal 2014 was immaterial to the consolidated results, financial position and cash flows for the third quarter of fiscal 2014 and prior periods. Consequently, the cumulative effect of these adjustments was recorded during fiscal 2014.

Earnings_Loss_Per_Share

Earnings (Loss) Per Share	9 Months Ended
	Jan. 02, 2015
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Earnings (Loss) Per Share
	Basic earnings (loss) per common share (EPS) and diluted EPS are calculated as follows:
		Quarter Ended						Nine Months Ended
	(Amounts in millions, except per-share amounts)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Net (loss) income attributable to CSC common stockholders
	From continuing operations	$	(314	)	$	276		$	12		$	586
	From discontinued operations	—			(5		)	(29		)	91
		$	(314	)	$	271		$	(17	)	$	677
	Common share information:
	Weighted average common shares outstanding for basic EPS	140.637			146.735			143.141			148.212
	Dilutive effect of stock options and equity awards	—			2.627			3.182			2.912
	Shares for diluted earnings (loss) per share	140.637			149.362			146.323			151.124
	Earnings (loss) per share – basic and diluted:
	Basic EPS:
	Continuing operations	$	(2.23	)	$	1.88		$	0.08		$	3.96
	Discontinued operations	—			(0.03		)	(0.20		)	0.61
	Total	$	(2.23	)	$	1.85		$	(0.12	)	$	4.57
	Diluted EPS:
	Continuing operations	$	(2.23	)	$	1.84		$	0.08		$	3.88
	Discontinued operations	—			(0.03		)	(0.20		)	0.6
	Total	$	(2.23	)	$	1.81		$	(0.12	)	$	4.48
	The computation of diluted earnings (loss) per share, for the quarter ended January 2, 2015, excluded 5,934,192 stock options and 2,019,663 restricted stock units (RSUs), whose effect, if included, would have been anti-dilutive due to the Company's net loss.
	In addition, stock options and RSUs whose impact would have been anti-dilutive, were excluded from the diluted earnings (loss) per share computation. The number of shares related to such stock options was 1,218,655 and 1,074,109 for the quarter and nine months ended January 2, 2015, respectively, and 4,765,896 and 4,843,346 for the quarter and nine months ended December 27, 2013, respectively. The number of shares related to such RSUs was 1,666,952 and 101,058 for the quarter and nine months ended January 2, 2015, respectively, and 535,373 and 139,548 for the quarter and nine months ended December 27, 2013, respectively.

Fair_Value

Fair Value	9 Months Ended
	Jan. 02, 2015
Fair Value [Abstract]
Fair Value	Fair Value
	Fair value measurements on a recurring basis
	The following tables present the Company’s assets and liabilities, excluding pension assets, that are measured at fair value on a recurring basis as of January 2, 2015 and March 28, 2014:
		As of January 2, 2015
				Fair Value Hierarchy
	(Amounts in millions)	Fair Value		Level 1		Level 2		Level 3
	Assets:
	Money market funds and money market deposit accounts	$	289	$	289	$	—	$	—
	Time deposits	551		551		—		—
	Derivative instruments	13		—		13		—
	Total assets	$	853	$	840	$	13	$	—
	Liabilities:
	Derivative instruments	$	12	$	—	$	12	$	—
	Total liabilities	$	12	$	—	$	12	$	—
		As of March 28, 2014
				Fair Value Hierarchy
	(Amounts in millions)	Fair Value		Level 1		Level 2		Level 3
	Assets:
	Money market funds and money market deposit accounts	$	717	$	717	$	—	$	—
	Time deposits	693		693		—		—
	Derivative instruments	5		—		5		—
	Total assets	$	1,415	$	1,410	$	5	$	—
	Liabilities:
	Derivative instruments	$	4	$	—	$	4	$	—
	Total liabilities	$	4	$	—	$	4	$	—
	The Company's money market funds, money market deposit accounts and time deposits are reported in cash and cash equivalents and short-term investments are included in prepaid expenses and other current assets. The balance sheet classifications of the Company's derivative instruments are presented in Note 8. There were no transfers between Level 1 and Level 2 and no transfers into or out of Level 3.
	Derivative instruments include foreign currency forward and option contracts, interest rate swap contracts and total return swaps (see Note 8). The fair value of foreign currency forward contracts represents the estimated amount required to settle the contracts using current market exchange rates, and is based on the month-end foreign currency exchange rates and forward points. The fair value of currency options is estimated based on valuation models that use the original strike price, movement and volatility in foreign currency exchange rates, and length of time to expiration as inputs. The fair value of interest rate swaps is estimated based on valuation models that use interest rate yield curves as inputs. Total return swaps are settled on the last day of every fiscal month. The inputs used to estimate the fair value of the Company's derivative instruments are classified as Level 2.
	Fair value measurements on a non-recurring basis
	Assets and liabilities measured at fair value on a non-recurring basis include goodwill, tangible assets, intangible assets, and other contract related long-lived assets. Such assets are reviewed quarterly for impairment indicators. If a triggering event has occurred, the assets are remeasured when the estimated fair value of the corresponding asset or asset group is less than the carrying value. The fair value measurements, in such instances, are based on significant unobservable inputs (Level 3). There were no significant impairments recorded during the quarters and nine months ended January 2, 2015 and December 27, 2013.
	Financial instruments not measured at fair value
	The carrying amounts of the Company’s financial instruments with short-term maturities are deemed to approximate their market values. The carrying amount of the Company’s long-term debt, excluding capital leases was $1,937 million and $1,874 million, and the estimated fair value was $2,076 million and $2,057 million, as of January 2, 2015 and March 28, 2014, respectively. The fair value of long-term debt is estimated based on the current interest rates offered to the Company for instruments with similar terms and remaining maturities and are classified as Level 2.
	The Company is subject to counterparty risk in connection with its derivative instruments (see Note 8). With respect to its foreign currency derivatives, as of January 2, 2015 there were four counterparties with concentration of credit risk. Based on gross fair value of these foreign currency derivative instruments, the maximum amount of loss that the Company could incur is less than $1 million. With respect to its interest rate swaps, there were three counterparties with concentration of risk and the maximum amount of loss that the Company could incur was $16 million as of January 2, 2015.
	The primary financial instruments other than derivatives (see Note 8) that potentially subject the Company to concentrations of credit risk are accounts receivable. The Company’s customer base includes Fortune 500 companies, the U.S. federal governmental and other governmental bodies and other significant, well-known companies operating in North America, Europe and the Pacific Rim. Credit risk with respect to accounts receivable is minimized because of the nature and diversification of the Company’s customer base. Furthermore, the Company continuously reviews its accounts receivable and records provisions for doubtful accounts as needed.
	The Company’s credit risk is also affected by customers in bankruptcy proceedings; however, because most of these proceedings involve business reorganizations rather than liquidations and the nature of the Company’s services are often considered essential to the operational continuity of these customers, the Company is generally able to avoid or mitigate significant adverse financial impact in these cases. As of January 2, 2015, the Company had $16 million of accounts receivable, $11 million of related allowance for doubtful accounts, $1 million of other assets, and $4 million of accounts payable with customers involved in bankruptcy proceedings.

Derivative_Instruments

Derivative Instruments	9 Months Ended
	Jan. 02, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments
	The Company is exposed to certain market risks, including the effect of changes in interest rates and foreign currency exchange rates, and the value of notional investments underlying the Company's non-qualified deferred compensation plan. Changes in benchmark interest rates can impact the fair value of the Company's term notes, whereas changes in foreign currency exchange rates can impact the Company's foreign currency denominated monetary assets and liabilities and forecasted transactions in foreign currency. Market volatility of the notional investments underlying the Company's non-qualified deferred compensation plan can impact the Company's obligations under the plan. The Company uses derivative instruments to mitigate the impact of these market risks and not for trading or any speculative purpose.
	The Company designates certain derivative instruments as hedges, for purposes of hedge accounting. For such derivative instruments, the Company documents its risk management objectives and strategy for undertaking hedging transactions, as well as all relationships between hedging and hedged risks. The derivative instruments designated for hedge accounting consist mainly of interest rate swaps and foreign currency forward contracts. Changes in the fair value measurements of the cash flow hedge derivative instruments are reflected as adjustments to other comprehensive income (OCI), while changes in fair value measurements of interest rate swaps are recorded in current period earnings.
	The derivative instruments not designated as hedges for purposes of hedge accounting include total return swaps and certain short-term foreign currency forward and option contracts. These instruments are recorded at their respective fair values and the change in their value is reported in current period earnings.
	All cash flows associated with the Company's derivative instruments are classified as operating activities in the unaudited Consolidated Condensed Statement of Cash Flows.
	The following table presents the fair values of derivative instruments included on the unaudited Consolidated Condensed Balance Sheets as of January 2, 2015 and March 28, 2014:
		Derivative Assets										Derivative Liabilities
	(Amounts in millions)	Balance sheet line item		As of January 2, 2015				As of March 28, 2014				Balance sheet line item	As of January 2, 2015				As of March 28, 2014
	Derivatives designated for hedge accounting:
	Interest rate	Other assets		$	13			$	3			Other long-term liabilities	$	—			$	—
	Foreign Currency forward contracts	Prepaid expense and other current assets		—				—				Accrued expenses and other current liabilities	8				—
	Total fair value of derivatives designated for hedge accounting			$	13			$	3				$	8			$	—
	Derivatives not designated for hedge accounting:
	Foreign Currency forward contracts	Prepaid expense and other current assets		$	—			$	2			Accrued expenses and other current liabilities	$	4			$	4
	Total fair value of derivatives not designated for hedge accounting			$	—			$	2				$	4			$	4
	Derivative instruments designated as hedges
	Fair value hedges
	Pursuant to its interest rate and risk management strategy, during the second quarter of fiscal 2014, the Company entered into multiple interest rate swap transactions to hedge the fair value of $275 million of the Company’s 4.45% term notes, due 2022, which effectively converted the debt into floating interest rate debt. For accounting purposes, these interest rate swap transactions were designated as fair value hedges and qualified for the short-cut method of hedge accounting, as defined under ASC Topic 815, “Derivatives and Hedging.” Accordingly, changes in the fair values of the interest rate swaps are reported in earnings and fully offset changes in the fair value of the underlying debt (see Note 9); therefore, no net gain or loss is recognized in the unaudited Consolidated Condensed Statement of Operations.
	The following table presents the pre-tax gains (losses) related to the fair value hedges and the related hedged items for the quarters ended January 2, 2015 and December 27, 2013, respectively:
		Derivative Instrument									Hedged Item
	(Amounts in millions)	Statement of Operations line item	Gain (Loss) for the Quarter Ended								Balance Sheet line item		Gain (Loss) for the Quarter Ended
			2-Jan-15				27-Dec-13						2-Jan-15				27-Dec-13
	Interest rate swaps	Other Income (Expense)	$	6			$	(6	)		Debt		$	(6	)		$	6
	The following table presents the pre-tax gains (losses) related to the fair value hedges and the related hedged items, for the nine months ended January 2, 2015 and December 27, 2013, respectively:
		Derivative Instrument									Hedged Item
	(Amounts in millions)	Statement of Operations line item	Gain (Loss) for the Nine Months Ended								Balance Sheet line item		Gain (Loss) for the Nine Months Ended
			2-Jan-15				27-Dec-13						2-Jan-15				27-Dec-13
	Interest rate swaps	Other Income (Expense)	$	10			$	—			Debt		$	(10	)		$	—
	Cash flow hedges
	During the first quarter of fiscal 2015, the Company designated certain foreign currency forward contracts as cash flow hedges, to reduce risks related to certain Indian Rupee denominated intercompany obligations and forecasted transactions for a nine-month period through March 2015. As of January 2, 2015, the notional amount of foreign currency forward contracts designated as cash flow hedges was $339 million, and the related forecasted transactions extend through September 2016.
	For the quarter ended January 2, 2015, the Company performed an assessment at the inception of the cash flow hedge transactions that determined all critical terms of the hedging instruments and hedged items match; therefore there is no ineffectiveness to be recorded and all changes in the hedging instruments’ fair value are recorded in accumulated OCI and subsequently reclassified into earnings in the period during which the hedged transactions are recognized in earnings. The Company performs an assessment of critical terms on an on-going basis throughout the hedging period. During the quarter ended January 2, 2015, the Company did not discontinue any cash flow hedge for which it was probable that the hedged transaction would not occur. As of January 2, 2015, $4 million of the existing amount of losses related to the cash flow hedge reported in accumulated OCI are expected to be reclassified into earnings within the next 12 months.
	The following table presents the pre-tax gains (losses) associated with the cash flow hedges, recognized in accumulated OCI, for the quarters ended January 2, 2015 and December 27, 2013, respectively:
	(Amounts in millions)	Gain (Loss) recognized in Accumulated OCI (effective portion) for the Quarter Ended								Gain (Loss) reclassified into cost of services from Accumulated OCI (effective portion) for the Quarter Ended								Gain (loss) recognized in Other Income (Expense) (ineffective portion) for the Quarter Ended
		2-Jan-15				27-Dec-13				2-Jan-15				27-Dec-13				2-Jan-15		27-Dec-13
	Foreign currency forward and option contracts	$	(2	)		$	—			$	—			$	—			$	—	$	—
	The following table presents the pre-tax gains (losses) associated with the cash flow hedges, recognized in accumulated OCI, for the nine months ended January 2, 2015 and December 27, 2013, respectively:
	(Amounts in millions)	Gain (Loss) recognized in Accumulated OCI (effective portion) for the Nine Months Ended								Gain (Loss) reclassified into cost of services from Accumulated OCI (effective portion) for the Nine Months Ended								Gain (loss) recognized in Other Income (Expense) (ineffective portion) for the Nine Months Ended
		2-Jan-15				27-Dec-13				2-Jan-15				27-Dec-13				2-Jan-15		27-Dec-13
	Foreign currency forward and option contracts	$	(8	)		$	—			$	—			$	—			$	—	$	—
	Derivatives not designated for hedge accounting
	Total return swaps
	Beginning in the first quarter of fiscal 2015, the Company entered into total return swaps (TRS) derivative contracts to hedge market volatility of the notional investments underlying the Company's deferred compensation obligations. Changes in the fair value of these derivatives and changes in the associated hedged liabilities are recorded in cost of services and selling, general and administrative expenses. The TRS are entered into monthly and are settled on the last day of every fiscal month.
	Foreign currency derivatives
	The Company manages exposure to fluctuations in foreign currencies by using short-term foreign currency forward and option contracts to economically hedge certain foreign currency denominated assets and liabilities, including intercompany accounts and loans. For accounting purposes, these foreign currency option and forward contracts are not designated as hedges, as defined under ASC 815, “Derivatives and Hedging,” and all changes in their fair value are reported in current period earnings within the other income (expense) line of the unaudited Consolidated Statement of Operations. The notional amount of the foreign currency forward contracts outstanding as of January 2, 2015 and March 28, 2014 was $512 million and $816 million, respectively. The notional amount of option contracts outstanding as of January 2, 2015 and March 28, 2014 was $0 and $81 million, respectively.
	The following table presents the pretax amounts affecting income related to derivatives not designated for hedge accounting for the quarters ended January 2, 2015 and December 27, 2013, respectively:
				Quarter Ended								Nine Months Ended
	(Amounts in millions)	Statement of Operations line item		2-Jan-15				27-Dec-13				2-Jan-15				27-Dec-13
	Total return swaps	Cost of services and Selling, general & administrative expenses		$	3			$	—			$	7			$	—
	Foreign currency forwards and options	Other Income (Expense)		—				2				(5		)		(14		)
	Total			$	3			$	2			$	2			$	(14	)
	Other risks
	As discussed further in Note 7, the Company is exposed to the risk of losses in the event of non-performance by the counterparties to its derivative contracts. To mitigate counterparty credit risk, the Company regularly reviews its credit exposure and the creditworthiness of the counterparties. The Company also enters into enforceable master netting arrangements with some of its counterparties. However for financial reporting purposes it is the Company’s policy to not offset derivative assets and liabilities despite the existence of enforceable master netting arrangements with some of its counterparties. As of January 2, 2015 and March 28, 2014, there were no amounts that the Company elected to not offset. The Company's derivative contracts do not require it to hold or post collateral.

Debt

Debt	9 Months Ended
	Jan. 02, 2015
Debt Disclosure [Abstract]
Debt	Debt
	The following is a summary of the Company's debt as of January 2, 2015 and March 28, 2014:
	(Amounts in millions)	January 2, 2015		March 28, 2014
	4.45% term notes, due September 2022	$	445	$	434
	6.50% term notes, due March 2018	917		917
	2.50% term notes, due September 2015	350		350
	Note payable, due January 2016	389		413
	Mandatorily redeemable preferred stock outstanding	61		61
	Note payable of consolidated subsidiary	68		68
	Capitalized lease liabilities	378		511
	Borrowings for assets acquired under long-term financing	112		98
	Other borrowings	4		36
	Total debt	2,724		2,888
	Less: short term debt and current maturities of long term debt	554		681
	Total long-term debt	$	2,170	$	2,207
	During the second quarter of fiscal 2015, CSC modified its existing $2.5 billion credit facility agreement by extending the maturity date from January 15, 2019 to January 15, 2020. There were no borrowings outstanding against the $2.5 billion credit facility as of January 2, 2015 and March 28, 2014. The Company also extended the maturity date of its £250 million or $389 million (at January 2, 2015 exchange rate) note payable from December 2014 to January 19, 2016, effective December 19, 2014.
	The increase in balance of the 4.45% term notes reflects the year-to-date change in fair value of the interest rate swaps (see Note 8).
	The Company was in compliance with all financial covenants associated with its credit facility agreement and note payable as of January 2, 2015 and March 28, 2014.
	During the first quarter of fiscal 2015, CSC Asset Funding I LLC, which is a special purpose subsidiary of CSC Finance Co. LLC (CSC Finco) which is a wholly owned subsidiary of the Company, entered into a master loan and security agreement with a financial institution which provides for a $250 million committed Lease Credit Facility (Leasing Facility) to finance CSC Finco's capital expenditures for IT equipment and associated software in support of IT services provided to the Company's customers. The drawdown availability period for the Leasing Facility is eighteen months, and once drawn, converts into individual term notes of variable terms up to sixty months therefrom, depending on the nature of the underlying equipment being financed. There were no borrowings against the Lease Credit Facility as of January 2, 2015. CSC Finco was in compliance with all financial covenants associated with the leasing facility at January 2, 2015.

Pension_and_Other_PostRetireme

Pension and Other Post-Retirement Benefit Plans	9 Months Ended
	Jan. 02, 2015
Pension And Other Benefit Plans [Abstract]
Pension and Other Benefit Plans	Pension and Other Post-Retirement Benefit Plans
	The Company and its subsidiaries sponsor a number of pension and other post-retirement benefit plans. During the first quarter of fiscal 2015, the Company changed its accounting policies related to its defined benefit pension and other post-retirement benefit plans (see Note 2).
	The net periodic pension cost (benefit) for U.S. and non-U.S. pension plans included the following components:
		Quarter Ended
		U.S. Plans						Non-U.S. Plans
	(Amounts in millions)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Service cost	$	1		$	1		$	5		$	6
	Interest cost	38			37			29			32
	Expected return on assets	(61		)	(52		)	(44		)	(42		)
	Amortization of transition obligation	—			—			—			1
	Amortization of prior service (credit) cost	—			—			(2		)	—
	Recognition of actuarial losses (gains)	374			—			26			(114		)
	Contractual termination benefits	—			—			(1		)	—
	Settlement loss	56			—			3			—
	Net periodic pension cost (benefit)	$	408		$	(14	)	$	16		$	(117	)
		Nine Months Ended
		U.S. Plans						Non-U.S. Plans
	(Amounts in millions)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Service cost	$	3		$	4		$	17		$	19
	Interest cost	114			112			90			94
	Expected return on assets	(182		)	(162		)	(138		)	(121		)
	Amortization of transition obligation	—			—			1			1
	Amortization of prior service cost (credit)	—			2			(8		)	(2		)
	Recognition of actuarial losses (gains)	375			—			26			(114		)
	Contractual termination benefits	—			—			(8		)	3
	Settlement loss (income)	58			(28		)	3			—
	Net periodic pension cost (benefit)	$	368		$	(72	)	$	(17	)	$	(120	)
	The net periodic pension cost, both for the third quarter and the first nine months of fiscal 2015, was primarily due to the recognition of actuarial and settlement losses arising from the interim remeasurement of certain defined benefit U.S. and Swiss pension plans.
	During the third quarter of fiscal 2015, the Company offered lump sum settlements to the vested participants of certain of its U.S. defined benefit pension plans, who were no longer with the Company. The lump-sum settlement required interim remeasurement of the plans' assets and liabilities, as of the end of the third quarter of fiscal 2015, which resulted in a net loss of $430 million, comprising actuarial losses of $374 million and a settlement loss of $56 million. The actuarial and settlement losses were primarily a result of the adoption of the new mortality tables issued by the Society of Actuaries in October 2014. The economic benefit realized due to the lump sum payments was $98 million which is included in the net loss of $430 million.
	The lump sum settlement resulted in reduction of the aggregate pension benefit obligation (PBO) of these U.S. defined benefit plans by $583 million, whereas the interim remeasurement resulted in an increase in PBO of $474 million. A weighted average discount rate of 4.13% was used to remeasure the plans; a decrease from 4.58% used in the prior fiscal year. The average funded status of the impacted U.S. pension plans, after remeasurement, was 87%. The weighted-average expected long-term rate of return on plan assets, after remeasurement, is 7.60% which is consistent with the rate used at the beginning of the fiscal year 2015.
	During the third quarter, a defined benefit pension plan in Switzerland was subject to interim remeasurement due to the significant amount of settlement payments from the plan. The interim remeasurement of the plan assets and liabilities resulted in an aggregate charge of $29 million, comprising actuarial losses of $26 million and a settlement loss of $3 million. A discount rate of 1.20% was used to remeasure the plans; a decrease from 2.10% in the prior fiscal year. As a result of the remeasurement, the plan's PBO decreased by $38 million and the funded status was 78%. The weighted-average expected long-term rate of return on plan assets, after remeasurement, is 3.60%, which is consistent with the rate used at the beginning of fiscal 2015.
	During the first quarter of fiscal 2015, a curtailment loss of $2 million was recorded. This curtailment charge was associated with one of the U.S. pension plans and resulted from amortization of the prior service cost. The plan was remeasured on April 30, 2014 using a discount rate of 4.14%, a decrease from 4.23% at the prior fiscal year end, which resulted in an increase to the fair value of actuarial PBO of $1 million, increasing the plan’s unfunded obligations.
	On July 31, 2014, CSC completed the sale of a German software business, which had a pension plan (see Note 4). The plan was remeasured as of the date of the sale, resulting in settlement costs totaling $3 million, which has been reported within discontinued operations.
	On July 19, 2013, CSC completed the sale of ATD (See Note 4), which had a pension and a retiree medical plan. The plans were remeasured as of the date of the sale, resulting a in settlement benefit of $28 million associated with the pension plan and $8 million associated with the retiree medical plan, and a reduction to long-term liabilities of $28 million.
	On December 20, 2013, two U.K. pension plans were remeasured due to a plan amendment arising from a change in index used to determine the level of pension increases, from the Retail Prices Index (RPI) to the Consumer Price Index (CPI). A weighted average discount rate of 4.65% was used to remeasure the plans; an increase from 4.31% in the prior fiscal year. The remeasurement resulted in recognition of actuarial gains of $114 million during the third quarter of fiscal 2014, and reduction of PBO decreased by $443 million.
	The Company contributed $14 million and $60 million to the defined benefit pension plans during the third quarter and nine months ended January 2, 2015, respectively. The Company expects to contribute an additional $18 million during the remainder of fiscal 2015. Additional contributions may be required to meet funding levels or ongoing service costs of unfunded plans as required by Section 430 of the United States Internal Revenue Code, as amended (the Code) and the Pension Protection Act of 2006, or by local regulations. In the case of the U.S. defined benefit pension plans, the Company currently expects no additional contributions during remainder of fiscal 2015.
	The components of net periodic benefit cost for other post-retirement benefit plans, reported on a global basis, included the following:
		Quarter Ended
	(Amounts in millions)	January 2, 2015			December 27, 2013
	Service cost	$	—		$	1
	Interest cost	2			2
	Expected return on assets	(2		)	(2		)
	Amortization of prior service (credit) costs	(7		)	—
	Recognition of actuarial losses	1			—
	Net provision for post-retirement benefits	$	(6	)	$	1
		Nine Months Ended
	(Amounts in millions)	January 2, 2015			December 27, 2013
	Service cost	$	2		$	3
	Interest cost	6			7
	Expected return on assets	(5		)	(4		)
	Amortization of prior service (credit)	(8		)	(2		)
	Recognition of actuarial losses	1			—
	Settlement (gain)	—			(8		)
	Net provision for post-retirement benefits	$	(4	)	$	(4	)
	On October 6, 2014, the Company amended its U.S. retiree medical health plans to provide coverage to eligible Medicare retirees through a private insurance marketplace. The insurance marketplace will allow retirees to choose the health insurance terms, cost and coverage that best fit their needs, while CSC will continue to provide financial support to the Medicare eligible participants in the form of a tax free contribution to a health reimbursement account. These amendments resulted in interim remeasurement of the retiree medical plans, which resulted in an actuarial loss of $1 million. A weighted average discount rate of 4.01% was used to remeasure the plans; a decrease from 4.32% in the prior fiscal year. As a result of the remeasurement, the benefit obligations decreased and the prior service credit increased by $99 million each. Subsequent to the remeasurement, the average funded status was 74%. The weighted-average expected long-term rate of return on plan assets is 7.50% as of October 6, 2014, after remeasurement, which is consistent with the rate at the beginning of the year, March 29, 2014.
	The Company contributed $0 million and $3 million to the other post-retirement benefit plans during the quarter and nine months ended January 2, 2015, respectively. The Company does not expect to contribute any incremental amounts during the remainder of fiscal 2015.

Income_Taxes

Income Taxes	9 Months Ended
	Jan. 02, 2015
Income Taxes [Abstract]
Income Taxes	Income Taxes
	The Company's effective tax rate on income from continuing operations (ETR) was 25.1% and 43.9% for the quarter and nine months ended January 2, 2015, respectively, and 21.5% and 27.3% for the quarter and nine months ended December 27, 2013, respectively. The following are the primary drivers of the ETR for the nine months ended January 2, 2015 and December 27, 2013. For the tax impact of discontinued operations, see Note 4.
	•	During the third quarter and nine months ended January 2, 2015, the ETR was impacted by a $462 million mark-to-market accounting loss related to CSC pension plans which was partially offset by a penalty of $190 million recorded as part of a settlement with the Securities and Exchange Commission. The impact of the pension mark-to-market and SEC penalty adjustments decreased the ETR by 2.9% for the third quarter and increased the ETR by 16.7% for the nine months ended January 2, 2015.
	•	During the third quarter and nine months ended January 2, 2015, the ETR decreased due to the global mix of income.
	•	During the third quarter and nine months ended January 2, 2015, the Company recorded $11 million and $15 million of income tax benefits, respectively, related to the reversal of certain state uncertain tax positions for which the statute of limitations has expired, which decreased the ETR by 2.7% and 36.5%, respectively.
	•	During the third quarter and nine months ended December 27, 2013, the Company recorded an income tax benefit of approximately $6 million relating to the settlement of audits for certain of its Non-U.S. jurisdictions, which reduced the ETR by 1.7% and 0.7%, respectively.
	•	During the third quarter and nine months ended December 27, 2013, the Company recorded a mark-to-market accounting gain of $114 million related to CSC pension plans in certain Non-U.S. jurisdictions with valuation allowances established on their deferred tax assets, which decreased the ETR by 10.0% and 4.3%, respectively.
	Significant management judgment is required in determining the Company's provision for income taxes, deferred tax assets and liabilities, and any valuation allowance recorded against deferred tax assets. A valuation allowance has been recorded against certain deferred tax assets due to uncertainties related to the ability to utilize these assets. The valuation allowance is based on historical earnings, estimates of taxable income by jurisdiction and the period over which the deferred tax assets will be recoverable. Valuation allowances are evaluated periodically and will be subject to change in each future reporting period as a result of changes in various factors. As of January 2, 2015, total valuation allowances included approximately $360 million related to deferred tax assets, including tax loss carryforwards, in the United Kingdom. In evaluating positive and negative evidence through the end of the third quarter, including three-year cumulative historical losses on a US GAAP basis, management has concluded that such valuation allowances continue to be appropriate. Based on recent earnings in this jurisdiction and an expectation that the business may be able to demonstrate a pattern of sustained profitability by the end of the fourth quarter, management believes there is a reasonable possibility that, by the end of fiscal 2015, sufficient positive evidence may become available to reach a conclusion that a portion of the valuation allowance related to the United Kingdom will no longer be needed. As such, the Company may release a portion of its valuation allowance against its deferred taxes, which would result in the recognition of certain deferred tax assets and an income tax benefit for the period in which such release is recorded.
	There were no material changes to uncertain tax positions as of the third quarter of fiscal 2015 compared to the fiscal 2014 year-end, except for $16 million of state uncertain tax positions for which the statute of limitations has expired.
	The Internal Revenue Service (IRS) examined several issues for the fiscal years 2008 through 2010 that resulted in audit adjustments to the Company's federal income tax returns. The Company does not agree with many of the proposed adjustments and has filed an Appeals brief. As a result, the Company expects to reach a resolution no earlier than fiscal year 2016. The significant items subject to appeal primarily relate to foreign exchange losses and other U.S. international tax issues. In addition, the Company may settle certain other tax examinations, have lapses in statutes of limitations, or voluntarily settle income tax positions in negotiated settlements for different amounts than the Company has accrued as uncertain tax positions. The Company may need to accrue and ultimately pay additional amounts for tax positions that previously met a more likely than not standard if such positions are not upheld. Conversely, the Company could settle positions with the tax authorities for amounts lower than those that have been accrued or extinguish a position through payment. The Company believes the outcomes which are reasonably possible within the next twelve months may result in a reduction in the liability for uncertain tax positions of up to $15 million, excluding interest, penalties, and tax carryforwards.

Stock_Incentive_Plans

Stock Incentive Plans	9 Months Ended
	Jan. 02, 2015
Stock Incentive Plans [Abstract]
Stock Incentive Plans	Stock Incentive Plans
	For the quarters and nine months ended January 2, 2015 and December 27, 2013, the Company recognized stock-based compensation expense as follows:
			Quarter Ended							Nine Months Ended
	(Amounts in millions)		January 2, 2015				December 27, 2013			January 2, 2015		December 27, 2013
	Cost of services		$	5			$	7		14		$	20
	Selling, general and administrative		14				13			40		33
	Total		$	19			$	20		$	54	$	53
	Total, net of tax		$	12			$	13		$	35	$	34
	Stock-based compensation for the first nine months of fiscal 2015 increased $1 million when compared to the same period of the prior year. The increase was due to $10 million of higher expense associated with the restricted stock units (RSUs) granted to the employees of ServiceMesh, which was acquired in the third quarter of fiscal 2014, and $11 million due to the fiscal 2015 option and RSU grants, impacted by the Company's higher stock price. These increases in expense were offset by $20 million of lower expense due to adjustments for forfeitures related to terminating employees.
	The Company uses the Black-Scholes-Merton model in determining the fair value of stock options granted. The weighted average grant-date fair values of stock options granted during the nine months ended January 2, 2015 and December 27, 2013 were $18.32 and $16.35 per share, respectively. In calculating the compensation expense for its stock incentive plans, the Company used the following weighted-average assumptions:
		Nine Months Ended
		January 2, 2015			December 27, 2013
	Risk-free interest rate	2.07	%		1.97	%
	Expected volatility	33	%		34	%
	Expected term (in years)	6.22			6.23
	Dividend yield	1.5	%		1.52	%
	For the nine months ended January 2, 2015 and December 27, 2013, the tax benefit realized from stock option exercises and RSU settlements was $41 million and $16 million, respectively, and the excess tax benefit was $15 million and $5 million, respectively.
	Employee Incentives
	The Company currently has two active stock incentive plans that authorize the issuance of stock options, restricted stock and other stock-based incentives to employees upon terms approved by the Compensation Committee of the Board of Directors. The Company issues authorized but previously unissued shares upon the exercise of stock options, the granting of restricted stock and the settlement of RSUs. As of January 2, 2015, 15,655,847 shares of CSC common stock were available for the grant of future stock options, equity awards or other stock-based incentives to employees under such stock incentive plans.
	Stock Options
	The Company’s standard vesting schedule for stock options is one-third of the total stock option award on each of the first three anniversaries of the grant date. Stock options are generally exercisable for a term of ten years from the grant date. Information concerning stock options granted under the Company's stock incentive plans is as follows:
		As of January 2, 2015
		Number			Weighted				Weighted	Aggregate
		of Option Shares			Average				Average	Intrinsic
					Exercise				Remaining	Value
					Price				Contractual	(millions)
									Term
	Outstanding as of March 28, 2014	9,829,611			$	43.3			5.73	$	167
	Granted	1,331,361			60.88
	Exercised	(3,507,145	)		44.81					62
	Canceled/Forfeited	(808,695	)		41.39
	Expired	(54,969	)		45.31
	Outstanding as of January 2, 2015	6,790,163			46.18				5.92	116
	Vested and expected to vest in the future as of January 2, 2015	6,622,324			45.92				5.84	115
	Exercisable as of January 2, 2015	4,134,127			44.48				4.15	78
	The total intrinsic value of options exercised during the nine months ended January 2, 2015 and December 27, 2013 was $62 million and $27 million, respectively. The cash received from stock options exercised during the nine months ended January 2, 2015 and December 27, 2013 was $151 million and $112 million, respectively.
	As of January 2, 2015, there was $34 million of total unrecognized compensation expense related to unvested stock options, net of expected forfeitures. The cost is expected to be recognized over a weighted-average period of 1.85 years.
	Restricted Stock Units
	Information concerning RSUs granted under stock incentive plans is as follows:
		As of January 2, 2015
		Number of			Weighted Average
		Shares			Fair Value per share
	Outstanding as of March 28, 2014	3,187,741				$	41.34
	Granted	982,278				60.79
	Released/Issued	(771,119	)			41.76
	Canceled/Forfeited	(604,159	)			41.51
	Outstanding as of January 2, 2015	2,794,741				48.02
	As of January 2, 2015, there was $98 million of total unrecognized compensation expense related to unvested RSUs, net of expected forfeitures. The unrecognized compensation expense is expected to be recognized over a weighted-average period of 2.00 years.
	Non-employee Director Incentives
	The Company has two stock incentive plans that authorize the issuance of stock options, restricted stock and other stock-based incentives to nonemployee directors upon terms approved by the Company’s Board of Directors. As of January 2, 2015, 175,300 shares of CSC common stock remained available for grant to non-employee directors as RSUs or other stock-based incentives.
	Generally, RSU awards to non-employee directors vest in full as of the next annual meeting of the Company’s stockholders following the date they are granted and are issued at a price of $0. Information concerning RSUs granted to non-employee directors is as follows:
		As of January 2, 2015
		Number of			Weighted Average
		Shares			Fair Value per share
	Outstanding as of March 28, 2014	184,146				$	42.07
	Granted	22,100				59.63
	Released/Issued	(62,260	)			44.1
	Canceled/Forfeited	—				—
	Outstanding as of January 2, 2015	143,986				43.88

Stockholders_Equity

Stockholder's Equity	9 Months Ended
	Jan. 02, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stockholder's Equity	Stockholder's Equity
	Stock Repurchase Program
	In May 2014, the Company’s Board of Directors approved a new share repurchase program authorizing up to $1.5 billion in share repurchases of the Company's outstanding common stock, after completion of the prior $1 billion share repurchase program. CSC has been implementing these programs through purchases in compliance with SEC rules, market conditions and applicable federal and state legal requirements. The timing, volume, and nature of share repurchases are at the discretion of management and may be suspended or discontinued at any time. No end date was established for the current repurchase program.
	The shares repurchased under the approved plan are retired immediately and included in the category of authorized but unissued shares. The excess of purchase price over par value of the common shares is allocated between additional paid-in capital and retained earnings.
	During the third quarter and first nine months of fiscal 2015, 150,000 and 7,205,050 shares were purchased, respectively, through open market purchases for an aggregate consideration of $9 million and $437 million, respectively, at a weighted average price of $59.09 and $60.60 per share, respectively. The Company also paid $6 million during the first quarter of fiscal 2015 for shares purchased during the fourth quarter of fiscal 2014 that had not yet settled in cash by March 28, 2014.
	During the second quarter of fiscal 2015, the Company entered into an accelerated share repurchase (ASR) agreement with a financial institution by advancing cash proceeds of $125 million. At inception, the ASR was initially settled by delivery of 1,258,651 shares to the Company, all of which were immediately retired. The actual number of shares required to be delivered to the Company was based on the trading prices of the Company's stock over a defined trading execution period under the agreement.
	During the third quarter of fiscal 2015, after completion of the pricing period, the financial institution returned $50 million to the Company and delivered 31,830 additional shares. As a result, the Company has repurchased under the ASR, 1,290,481 shares for a net consideration of $75 million, at an average price of $58.12 per share.
	During the third quarter and first nine months ending December 27, 2013, the Company repurchased 2,405,895 and 7,279,117 shares through open market purchases for an aggregate consideration of $125 million and $354 million, respectively, at a weighted average price of $51.96 and $48.58 per share, respectively. The approximate amount for which shares may yet be purchased under the share repurchase program at January 2, 2015 is $1.1 billion.
	Accumulated Other Comprehensive Income (Loss)
	The following tables show the activity in the components of other comprehensive income (loss), including the respective tax effects, and reclassification adjustments for the quarter and nine months ended January 2, 2015 and December 27, 2013, respectively:
	For the quarter ended January 2, 2015	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(90	)	$	—		$	(90	)
	Loss on foreign currency forward contracts	(2		)	—			(2		)
	Pension and other post-retirement benefit plans:
	Prior service credit arising during the year	97			(39		)	58
	Amortization of prior service costs	(9		)	3			(6		)
	Total pension and other post-retirement benefit plans	88			(36		)	52
	Total other comprehensive loss	$	(4	)	$	(36	)	$	(40	)
	For the quarter ended December 27, 2013	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(9	)	$	—		$	(9	)
	Pension and other post-retirement benefit plans:
	Prior service credit	260			—			260
	Amortization of transition obligation	1			—			1
	Amortization of prior service cost	(1		)	—			(1		)
	Total pension and other post-retirement benefit plans	260			—			260
	Total other comprehensive income	$	251		$	—		$	251
	For the nine months ended January 2, 2015	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(188	)	$	(1	)	$	(189	)
	Loss on foreign currency forward and option contracts	(8		)	—			(8		)
	Pension and other post-retirement benefit plans:
	Prior service credit arising during the year	97			(39		)	58
	Amortization of transition obligation	1			—			1
	Amortization of prior service costs	(14		)	3			(11		)
	Total pension and other post-retirement benefit plans	84			(36		)	48
	Total other comprehensive loss	$	(112	)	$	(37	)	$	(149	)
	For the nine months ended December 27, 2013	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(91	)	$	(2	)	$	(93	)
	Pension and other post-retirement benefit plans:
	Net actuarial gain	2			—			2
	Prior service credit	260			—			260
	Amortization of transition obligation	1			—			1
	Amortization of prior service cost	(2		)	—			(2		)
	Foreign currency exchange rate changes	(1		)	—			(1		)
	Total pension and other post-retirement benefit plans	260			—			260
	Total other comprehensive income	$	169		$	(2	)	$	167
	The following tables show the changes in accumulated other comprehensive income (loss), for the nine months ended January 2, 2015 and December 27, 2013, respectively:
	(Amounts in millions)	Foreign Currency Translation Adjustments			Cash Flow Hedge			Pension and Other Post-retirement Benefit Plans			Accumulated Other Comprehensive Income (Loss)
	Balance at March 28, 2014	$	(6	)	$	—		$	285		$	279
	Current-period other comprehensive (loss) income, net of taxes	(189		)	(8		)	58			(139		)
	Amounts reclassified from accumulated other comprehensive loss, net of taxes	—			—			1			1
	Balance at January 2, 2015	$	(195	)	$	(8	)	$	344		$	141
	(Amounts in millions)	Foreign Currency Translation Adjustments			Pension and Other Post-retirement Benefit Plans			Accumulated Other Comprehensive Income (Loss)
	Balance at March 29, 2013	$	74		$	34		$	108
	Current-period other comprehensive (loss) income, net of taxes	(93		)	261			168
	Amounts reclassified from accumulated other comprehensive loss, net of taxes	—			(10		)	(10		)
	Balance at December 27, 2013	$	(19	)	$	285		$	266

Cash_Flows

Cash Flows	9 Months Ended
	Jan. 02, 2015
Cash Flows [Abstract]
Cash Flows	Cash Flows
	Cash payments for interest on indebtedness and cash payments for taxes on income are as follows:
		Nine Months Ended
	(Amounts in millions)	January 2, 2015		December 27, 2013
	Interest	$	88	$	87
	Taxes on income, net of refunds	122		95
	Non-cash investing activities include the following:
		Nine Months Ended
	(Amounts in millions)	January 2, 2015		December 27, 2013
	Capital expenditures in accounts payable and accrued expenses	$	42	$	48
	Capital expenditures through capital lease obligations	10		96
	Assets acquired under long-term financing	74		5
	Non-cash investing activities for the nine months ended December 27, 2013 also included contingent consideration of $137 million for the Company's acquisition of ServiceMesh (see Note 4). Non-cash financing activities for the quarters ended January 2, 2015 and December 27, 2013 included common share dividends declared but not yet paid of $32 million and $29 million, respectively.

Segment_Information

Segment Information	9 Months Ended
	Jan. 02, 2015
Segment Information [Abstract]
Segment Information	Segment Information
	The Company’s reportable segments are as follows:
	•	Global Business Services (GBS) - GBS provides end-to-end applications services; consulting; big data services; and industry-aligned software and solutions to enterprise clients around the world. GBS manages and industrializes clients' application ecosystem through its Applications Services offering. The Company has formed a number of strategic partnerships with leading technology companies such as HCL Technologies and SAP to deliver world-class solutions to its customers. These partnerships will enable clients to modernize and move enterprise workloads to next generation cloud infrastructure, while leveraging the benefits of mobility, social networking and big data. The GBS consulting business assists clients in achieving greater value from current IT assets as well as aiding in the direction of future IT investments. GBS software and solutions include vertically-aligned solutions and process-based intellectual property. Clients include major global enterprises in the insurance, banking, healthcare, life sciences, manufacturing and a host of diversified industries. Key competitive differentiators for GBS include its global scale, depth of industry expertise, strong partnerships with leading technology companies, vendor and product independence and end-to-end capabilities. Changing business issues such as globalization, fast-developing economies, government regulation, and growing concerns around risk, security, and compliance drive demand for these GBS offerings.
	•	Global Infrastructure Services (GIS) – GIS provides managed and virtual desktop solutions, unified communications and collaboration services, data center management, cloud services, cyber security, compute and managed storage solutions to commercial clients globally. GIS also delivers next-generation hybrid Cloud infrastructure solutions to clients. The company integrates public cloud offerings from Amazon Web Services, IBM, Microsoft, and VMware, with its industry-leading private cloud solution, BizCloud. The CSC Agility Platform enables enterprises to manage, monitor, and automate applications over heterogeneous and hybrid clouds. The GIS portfolio of standard offerings delivers measurable results while reducing business risk and operational costs for clients. Collaboration with key alliance partners helps CSC to determine the best technology road map for clients and opportunities to differentiate solutions, expand market reach, augment capabilities, and jointly deliver impactful solutions.
	•	North American Public Sector (NPS) – NPS delivers IT, mission, and operations-related services to the Department of Defense and civil agencies of the U.S. federal government, as well as other foreign, state and local government agencies. Commensurate with the Company's strategy of leading the next generation of IT services, NPS is leveraging our commercial best practices and next-generation offerings to bring more cost-effective IT solutions to government agencies which are seeking efficiency through innovation. This approach is designed to yield lower implementation and operational costs as well as a higher standard of delivery excellence. Demand for NPS offerings are driven by evolving government priorities such as: 1) migration to next-generation IT solutions, which includes hybrid cloud infrastructure, application modernization and orchestration, 2) mission intelligence driven by big data solutions, 3) health IT and informatics, and 4) cyber security.
	Effective fiscal 2015, the Company changed its inter-company accounting policy. Previously, inter-company transactions were generally reflected as inter-company revenue. Under the new policy, inter-company transactions are now generally treated as cost transfers. The new inter-company policy has been applied retrospectively, adjusting the segment results for all prior periods presented (see Note 1). In addition, segment results for all prior periods presented have been recast to reflect the change in the Company's pension accounting policies (see Note 2).
	The following table summarizes operating results by reportable segment:
	(Amounts in millions)		GBS			GIS			NPS			Corporate			Eliminations		Total
	Quarter ended January 2, 2015
	Revenues		$	965		$	984		$	998		$	—		$	—	$	2,947
	Operating income (loss)		128			72			145			(13		)	—		332
	Depreciation and amortization		37			163			33			5			—		238
	Quarter ended December 27, 2013
	Revenues		$	1,093		$	1,145		$	990		$	—		$	—	$	3,228
	Operating income (loss)		140			91			122			(15		)	—		338
	Depreciation and amortization		34			177			36			4			—		251
	(Amounts in millions)		GBS			GIS			NPS			Corporate			Eliminations		Total
	Nine months ended January 2, 2015
	Revenues		$	3,056		$	3,151		$	3,057		$	—		$	—	$	9,264
	Operating income (loss)		366			211			456			(48		)	—		985
	Depreciation and amortization		116			529			104			13			—		762
	Nine months ended December 27, 2013
	Revenues		$	3,169		$	3,405		$	3,095		$	—		$	—	$	9,669
	Operating income (loss)		373			290			412			(44		)	—		1,031
	Depreciation and amortization		112			520			110			11			—		753
	Operating income (loss) provides useful information to the Company’s management for assessment of the Company’s performance and results of operations, and is one of the financial measures utilized to determine executive compensation. As mentioned in Note 2, in conjunction with the change in its pension accounting policies, the net actuarial gains and losses component of the net periodic pension benefit/cost are excluded from the Company’s definition of operating income and not allocated to the reportable segments, but instead recorded at the corporate level. All of the other elements of net periodic pension benefit/cost continue to be included within operating income of the Company’s reportable segments. The Company has applied the change in the allocation approach retrospectively, adjusting all prior periods.
	A reconciliation of consolidated operating income to income from continuing operations before taxes is as follows:
			Quarter Ended						Nine Months Ended
	(Amounts in millions)		January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Operating income (1)		$	332		$	338		$	985		$	1,031
	Corporate G&A		(59		)	(65		)	(182		)	(197		)
	Pension & OPEB actuarial & settlement (losses) gains		(462		)	114			(463		)	114
	SEC settlement related charges (2)		(195		)	—			(195		)	—
	Interest expense		(37		)	(38		)	(112		)	(112		)
	Interest income		4			4			14			11
	Other income (expense), net		(1		)	5			(6		)	(16		)
	(Loss) income from continuing operations before taxes		$	(418	)	$	358		$	41		$	831
	(1) The impact of the change in pension accounting policy was an increase in operating income of $208 million and $251 million for the third quarter and first nine months of fiscal 2015, respectively, and an increase in operating income of $22 million and $68 million for the third quarter and first nine months of fiscal 2014, respectively.
	(2) This item relates to the SEC investigation settlement (see Note 5).
	During the third quarter and the first nine months of fiscal 2015 and fiscal 2014, the Company recorded certain pre-tax out of period adjustments which should have been recorded in prior fiscal periods (see Note 5). The following tables summarize the effect of the pre-tax out of period adjustments on the GBS, GIS, and NPS segment results for the quarters and nine months ended January 2, 2015 and December 27, 2013, as if the adjustments had been recorded in the appropriate period:
			GBS
	(Amounts in millions)		As Reported			Increase/			As Adjusted
						(Decrease)
	Quarter ended January 2, 2015
	Revenues		$	965		$	(1	)	$	964
	Operating income		128			(4		)	124
	Depreciation and amortization		37			—			37
	Quarter ended December 27, 2013
	Revenues		$	1,093		$	(6	)	$	1,087
	Operating income		140			(7		)	133
	Depreciation and amortization		34			—			34
			GBS
	(Amounts in millions)		As Reported			Increase/			Adjusted
						(Decrease)
	Nine months ended January 2, 2015
	Revenues		$	3,056		$	3		$	3,059
	Operating income		366			5			371
	Depreciation and amortization		116			(1		)	115
	Nine months ended December 27, 2013
	Revenues		$	3,169		$	24		$	3,193
	Operating income		373			22			395
	Depreciation and amortization		112			1			113
			GIS
	(Amounts in millions)		As Reported			Increase/			As Adjusted
(Decrease)
Quarter ended January 2, 2015
Revenues		$	984		$	—		$	984
Operating income		72			—			72
Depreciation and amortization		163			—			163
Quarter ended December 27, 2013
Revenues		$	1,145		$	(2	)	$	1,143
Operating income		91			(6		)	85
Depreciation and amortization		177			—			177
		GIS
(Amounts in millions)		As Reported			Increase/			Adjusted
					(Decrease)
Nine months ended January 2, 2015
Revenues		$	3,151		$	2		$	3,153
Operating income		211			3			214
Depreciation and amortization		529			—			529
Nine months ended December 27, 2013
Revenues		$	3,405		$	(2	)	$	3,403
Operating income		290			(5		)	285
Depreciation and amortization		520			(1		)	519
		NPS
(Amounts in millions)		As Reported			Increase/			As Adjusted
					(Decrease)
Quarter ended January 2, 2015
Revenues		$	998		$	—		$	998
Operating income		145			—			145
Depreciation and amortization		33			—			33
Quarter ended December 27, 2013
Revenues		$	990		$	2		$	992
Operating income		122			1			123
Depreciation and amortization		36			—			36
		NPS
(Amounts in millions)		As Reported			Increase/			Adjusted
					(Decrease)
Nine months ended January 2, 2015
Revenues		$	3,057		$	5		$	3,062
Operating income		456			(5		)	451
Depreciation and amortization		104			—			104
Nine months ended December 27, 2013
Revenues		$	3,095		$	(5	)	$	3,090
Operating income		412			—			412
Depreciation and amortization		110			—			110

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
	Jan. 02, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets
	Goodwill
	The following table summarizes the changes in the carrying amount of goodwill by segment for the nine months ended January 2, 2015:
	(Amounts in millions)	GBS			GIS			NPS		Total
	Goodwill, gross	$	1,370		$	2,273		$	788	$	4,431
	Accumulated impairment losses	(690		)	(2,074		)	—		(2,764		)
	Balance as of March 28, 2014, net	680			199			788		1,667
	Additions	—			—			31		31
	Deductions	(2		)	—			—		(2		)
	Foreign currency translation	(27		)	—			—		(27		)
	Goodwill, gross	1,341			2,273			819		4,433
	Accumulated impairment losses	(690		)	(2,074		)	—		(2,764		)
	Balance as of January 2, 2015, net	$	651		$	199		$	819	$	1,669
	The fiscal 2015 addition to goodwill is due to the second quarter NPS acquisition described in Note 4. The foreign currency translation amount reflects the impact of currency movements on non-U.S. dollar-denominated goodwill balances.
	As of the beginning of fiscal 2015, a reassignment of goodwill occurred because of changes to the way in which GBS segment leadership began to regularly review the operating results within the GBS segment and because of the availability of discrete financial information. Goodwill was reassigned using a relative fair value allocation approach. CSC performed a quantitative and qualitative goodwill impairment assessment for the changed reporting units and determined that there was no indication that goodwill was impaired for those reporting units as of the end of the first quarter of fiscal 2015.
	The Company tests goodwill for impairment on an annual basis, as of the first day of the second fiscal quarter, and between annual tests if an event occurs, or circumstances change, that would more likely than not reduce the fair value of a reporting unit below its carrying amount. For the Company’s annual goodwill impairment assessment as of July 5, 2014, the Company first assessed qualitative factors to determine whether events or circumstances existed that would lead the Company to conclude that it was more likely than not that the fair value of any of its reporting units was below their carrying amounts. The Company determined that, based on its qualitative assessment of such factors for all reporting units, no reporting units met the more-likely-than-not threshold; accordingly, the Company did not perform further analysis.
	At the end of the third quarter of fiscal 2015, the Company assessed whether there were events or changes in circumstances that would more likely than not reduce the fair value of any of its reporting units below its carrying amount and require performing Step 1 of the traditional two-step goodwill impairment test. The Company determined that there were no such indicators and, as a result, it was unnecessary to perform an interim impairment test as of January 2, 2015.
	Other Intangible Assets
	A summary of amortizing intangible assets is as follows:
		As of January 2, 2015
	(Amounts in millions)	Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Outsourcing contract costs	$	1,333		$	1,003		$	330
	Software	2,457			1,681			776
	Customer and other intangible assets	478			323			155
	Total intangible assets	$	4,268		$	3,007		$	1,261
		As of March 28, 2014
	(Amounts in millions)	Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Outsourcing contract costs	$	1,465		$	1,038		$	427
	Software	2,330			1,680			650
	Customer and other intangible assets	588			315			273
	Total intangible assets	$	4,383		$	3,033		$	1,350
	Amortization related to intangible assets was $103 million and $97 million for the quarters ended January 2, 2015 and December 27, 2013, respectively, including reductions of revenue for amortization of outsourcing contract cost premiums of $8 million and $9 million and for amortization of contract related intangible assets of $2 million and $2 million, respectively. Amortization expense related to capitalized software was $53 million and $44 million for the quarters ended January 2, 2015 and December 27, 2013, respectively.
	Amortization related to intangible assets was $325 million and $289 million for the nine months ended January 2, 2015, and December 27, 2013, respectively, including reductions of revenue for amortization of outsourcing contract cost premiums of $25 million and $26 million and for amortization of contract related intangible assets of $7 million and $8 million, respectively. Amortization expense related to capitalized software was $163 million and $134 million for the nine months ended January 2, 2015 and December 27, 2013, respectively.
	Estimated amortization expense related to intangible assets as of January 2, 2015, for the remainder of fiscal 2015 is $112 million, and for each of the fiscal years 2016, 2017, 2018 and 2019, is as follows: $325 million, $256 million, $205 million and $176 million, respectively.
	During the first nine months of fiscal 2015, CSC sold certain intangible assets to a third party for total consideration of $43 million of which cash consideration was received of $17 million. As a result, CSC recorded a gain on sale of $43 million as a reduction of cost of sales in its GIS segment. As of January 2, 2015, CSC had $26 million of outstanding receivables related to these sales, which will be paid in quarterly installments.

Restructuring_Costs

Restructuring Costs	9 Months Ended
	Jan. 02, 2015
Restructuring Costs [Abstract]
Restructuring Costs	Restructuring Costs
	The Company recorded $12 million and $11 million of restructuring costs for the quarters ended January 2, 2015 and December 27, 2013, respectively. For the nine months ended January 2, 2015 and December 27, 2013, the Company recorded $15 million and $33 million of restructuring costs, respectively. The costs recorded during the quarter and nine months ended January 2, 2015 were in connection with actions under the Fiscal 2015 Plan and Fiscal 2013 Plan, as described below. The costs recorded during the quarter and nine months ended December 27, 2013 were in connection with actions under both the Fiscal 2013 and Fiscal 2012 plans, as described below.
	Fiscal 2015 Plan
	In June 2014, the Company initiated restructuring actions (the Fiscal 2015 Plan) across its business segments. The objectives of the Fiscal 2015 Plan are to further reduce headcount in order to align resources to support business needs. Management expects that further actions will be taken during fiscal 2015, which could result in additional charges.
	The composition of the restructuring liability for the Fiscal 2015 Plan as of January 2, 2015 is as follows:
	(Amounts in millions)		Restructuring liability as of March 28, 2014		Costs expensed in fiscal 2015			Less: costs not affecting restructuring liability (1)			Cash paid			Other			Restructuring liability as of January 2, 2015
	Workforce reductions		$	—	$	25		$	—		$	(11	)	$	(1	)	$	13
	(1)	Charges primarily consist of pension benefit augmentations and are recorded as a pension liability.
	Fiscal 2013 Plan
	In September 2012, the Company initiated restructuring actions (the Fiscal 2013 Plan) across its business segments. The objectives of the Fiscal 2013 Plan were to (i) further increase the use of lower cost off-shore resources, (ii) reduce headcount in order to align resources to support business needs, including the assessment of management span of control and layers, and (iii) optimize utilization of facilities. Actions under the Fiscal 2013 Plan commenced in September 2012 and continued through the end of fiscal 2014. The expense reduction in the first nine months of fiscal 2015 was due to cancellation of a portion of a restructuring plan in a region, as well as revisions on plans that were executed at lower than expected costs.
	The composition of the restructuring liability for the Fiscal 2013 Plan as of January 2, 2015 is as follows:
	(Amounts in millions)		Restructuring liability as of March 28, 2014		Costs expensed in fiscal 2015			Less: costs not affecting restructuring liability (1)			Cash paid			Other(2)			Restructuring liability as of January 2, 2015
	Workforce reductions		$	70	$	(12	)	$	7		$	(53	)	$	(2	)	$	10
	Facilities costs		13		2			—			(7		)	—			$	8
			$	83	$	(10	)	$	7		$	(60	)	$	(2	)	$	18
	(1)	Charges consist of pension benefit augmentations and are recorded as a pension liability.
	(2)	Foreign currency translation adjustments.
	Fiscal 2012 Plan
	In March 2012, the Company initiated restructuring actions (the Fiscal 2012 Plan) primarily impacting its GIS segment. The objectives of the Fiscal 2012 Plan were to (i) align the Company's workforce across various geographies with business needs, (ii) increase use of lower cost off-shore resources, and (iii) optimize utilization of facilities. Actions under the Fiscal 2012 Plan commenced in March 2012 and were carried out in fiscal 2013 and fiscal 2014. There were no restructuring costs for the Fiscal 2012 Plan accrued during the first nine months of fiscal 2015.
	The composition of the restructuring liability for the Fiscal 2012 Plan as of January 2, 2015 is as follows:
	(Amounts in millions)		Restructuring liability as of March 28, 2014		Costs expensed in fiscal 2015			Cash paid			Other(1)			Restructuring liability as of January 2, 2015
	Facilities costs		2		—			(2		)	1			1
	Total		$	2	$	—		$	(2	)	$	1		$	1
	(1)	Foreign currency translation adjustments.
	Of the total $32 million restructuring liability as of January 2, 2015, $31 million is a short-term liability and is included in accrued expenses and other current liabilities, and $1 million is included in other long-term liabilities.
	The composition of restructuring expenses for the third quarter and first nine months of fiscal 2015 and fiscal 2014 by segment is as follows:
			Quarter Ended					Nine Months Ended
	(Amounts in millions)		January 2, 2015		December 27, 2013			January 2, 2015			December 27, 2013
	GBS		$	10	$	7		$	12		$	25
	GIS		1		4			2			10
	NPS		—		—			—			—
	Corporate		1		—			1			(2		)
	Total		$	12	$	11		$	15		$	33
	The composition of restructuring expenses for the third quarter and first nine months of fiscal 2015 and fiscal 2014 by financial statement line item is as follows:
			Quarter Ended					Nine Months Ended
	(Amounts in millions)		January 2, 2015		December 27, 2013			January 2, 2015			December 27, 2013
	Cost of services		$	8	$	4		$	9		$	28
	Selling, general and administrative		4		7			6			5

Contract_with_the_UK_National_

Contract with the U.K. National Health Service	9 Months Ended
	Jan. 02, 2015
Cost of Services [Abstract]
Contract with the U.K. National Health Service	Contract with the U.K. National Health Service
	Revised Project Agreement
	The Company and the NHS are parties to a contract under which the Company has developed and deployed an integrated electronic patient records system. The NHS contract was amended in April 2009 and the parties entered into variation agreements subsequent to the 2009 amendment agreeing to various operational terms and conditions. The 2009 amendment included mutual releases of all claims existing at the time of the amendment.
	On August 31, 2012, the Company and the NHS entered into a binding interim agreement which was approved by all required U.K. government officials ("interim agreement contract change note" or "IACCN"). The IACCN amended the terms of the parties' then current contract under which the Company has developed and deployed an integrated patient records system using the Company's Lorenzo Regional Care software product. On March 28, 2013, the Company and the NHS signed a letter agreement that modified certain financial terms of the IACCN and provided for a change compensation payment by the NHS to the Company on that date in the amount of £10 million ($15 million) net of value added tax in full and final satisfaction of all costs and claims by CSC arising from changes to the Lorenzo software product that CSC delivered up to a certain version of the product. On October 4, 2013, the Company and the NHS finalized a full restatement of the contract through a "revised project agreement" (RPA). The RPA embodies and incorporates the principal terms of the IACCN and such letter agreement, makes certain other changes with respect the Company’s non-Lorenzo product deployments and consolidates the three regional contracts which comprised the Company's NHS contract into a single agreement. The RPA has been approved by all required U.K. government officials. Pursuant to the RPA, the parties have agreed to a mutual release of certain accrued claims under the contract through the date of the RPA, October 4, 2013.
	Principal Components of the IACCN and the RPA
	The key terms first agreed in the IACCN (and now embodied in the RPA) with respect to the delivery of the Lorenzo product and associated services are as follows:
	1	Under contract terms existing prior to the IACCN, the NHS was committed to purchase the Lorenzo product for multiple trusts. In addition, the Company was the exclusive supplier of such software products and related services to two out of the three regions of the U.K. covered by the existing contract. Under the IACCN (and as now embodied in the RPA), the parties agreed that the NHS is no longer subject to any trust volume commitment for the Lorenzo product, and the Company agreed to non-exclusive deployment rights for all products and services in those regions in which it previously enjoyed exclusivity. As a result, the individual trusts can choose third-party software vendors other than CSC to provide a software solution. CSC and the NHS have also agreed to a process for trusts which wish to take the Lorenzo products within the NME regions to obtain central funding from the U.K. Department of Health for implementation of the Lorenzo products. In addition, CSC may offer the Lorenzo solution throughout the rest of England where trusts select CSC's solutions through a separate competitive process.
	2	The IACCN (and as now embodied in the RPA), created pricing and payment terms for the Lorenzo product and new terms under which trusts in the contract's NME region that choose the Lorenzo product can access central funds for its deployment, subject to business case justification and the overall availability of such funding. While the funding is provided by the NHS, there is a far greater degree of interaction with the trusts under the terms agreed in the IACCN (and as now embodied in the RPA), as the Company works with each individual trust to build a business case and seek NHS approval and central funding to proceed.
	3	Under the IACCN (and as now embodied in the RPA), the Lorenzo product was redefined for pricing purposes, with Lorenzo Regional Care comprising the "Base Product," consisting of seven deployment units (or modules) and the "Additional Product," consisting of three other modules. The parties agreed that six of the Base Product's modules had completed the necessary NHS assurances and were ready to deploy to further trusts as of August 31, 2012. The remaining module of the Base Product was similarly accepted by the NHS as complete and ready to deploy to further trusts in early September 2012. Although the NHS assurance of the Base Product's seven modules is complete and the Company and the NHS are committed to complete the assurance of the Additional Product modules, neither the NHS nor any trust is obligated to purchase or deploy any of those modules.
	4	New trusts taking deployments of the Lorenzo product will receive ongoing managed services from the Company for a period of five years from the date such deployment is complete, provided deployment is complete or substantially complete by July 7, 2016. The services include hosting of the software and trust data at the Company's data center as well as support and maintenance, including regulatory updates and other changes over the term of the contract. Under contract terms existing prior to the IACCN, all services were to expire upon the end of the contract term of July 7, 2016, subject to an optional one year extension and an exit transition period.
	The IACCN did not materially alter the terms relating to the deployment of non-Lorenzo products. However, the RPA reflects certain terms not included in the IACCN relating to the Company’s continued deployment, hosting and maintenance services for non-Lorenzo products and services as follows:
	1	The RPA provides that the NHS will no longer be subject to commitments to purchase additional volumes of non-Lorenzo products and will instead have a committed repurposed fund of the same value in the approximate amount of £47.5 million ($75 million) as of the October 4, 2013 RPA effective date. The NHS may, but has no obligation to, use the repurposed fund to purchase a wide range of services and solutions from CSC under the RPA other than new deployments of Lorenzo products. Except as noted in point 2 below, the existing estate of deployed non-Lorenzo products are not affected by the RPA.
	2	The RPA also provides that the NHS may, subject to certain notice requirements and to the payment of certain decommissioning fees to CSC, require that certain services be removed, or decommissioned, from the scope of the contract and that the related service charges be adjusted accordingly. The NHS’s right to decommission services does not apply to Lorenzo services deployed after the October 4, 2013 RPA effective date or to ambulance services. The basis for decommissioning shall be either the complete closure of an NHS trust (or other NHS service recipient) or the cessation of relevant clinical services by a trust (or other NHS service recipient) (a “natural decommissioning”), or an NHS trust (or other NHS service recipient) determining that it no longer requires a particular service for any other reason (a “voluntary decommissioning”). The NHS is subject, during the remaining term of the contract, to an aggregate monetary limit on the ability to effect any voluntary decommissionings, which at the October 4, 2013 RPA effective date was approximately £19.6 million ($31 million). The NHS is also subject, during the remaining term of the contract, to aggregate monetary limits on the ability to effect any voluntary decommissionings with respect to individual modules of certain products, which limits at the October 4, 2013 RPA effective date, ranged from approximately £0.2 million to £4.4 million ($0.3 million to $6.9 million) (depending on the affected module in question).
	Accounting
	Prior to the IACCN, the NHS contract has been accounted for using the percentage-of-completion method based on management's best estimates of total contract revenue and costs. Based on then existing circumstances, CSC revised its estimate of revenues and costs at completion during the third quarter of fiscal 2012 to include only those revenues reasonably assured of collection. As a result of that change, the Company recorded a $1.5 billion contract charge in that quarter, resulting in no material remaining net assets. See additional disclosures in Notes 5 and 19 related to the settlement with the SEC.
	The terms of the IACCN (and as now embodied in the RPA) represented a significant modification to the prior agreement, including a significant reduction in additional product development and elimination of any commitment by the NHS to future Lorenzo deployments and the Company's exclusivity rights in two of the three contract regions. The Company concluded that it will account for the terms of the IACCN (and as now embodied in the RPA) as a new contract and will recognize revenue as a services arrangement. Revenue recognition for each trust deployment will begin at the start of the trust's hosting period. Payments from the NHS for deployment of systems will be deferred and recognized over the service period. Direct costs incurred for deployment activities will be deferred and amortized to expense over the service period as well. The total up-front consideration of £78 million ($120 million), including the £68 million ($105 million) net settlement payment and a £10 million ($15 million) escrow release, is primarily attributed to future Lorenzo deployments and will be deferred and recognized as revenue ratably over the term of the contract ending July 2016. The £10 million ($15 million) payment received on March 28, 2013, as well as future consideration not noted above, when and if earned, will be deferred and amortized over the longer of the term of the contract or the estimated performance period. As of January 2, 2015, the amount of deferred costs and deferred revenues was $18 million and $166 million, respectively.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Jan. 02, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Commitments
	In the normal course of business, the Company may provide certain clients, principally governmental entities, with financial performance guarantees, which are generally backed by stand-by letters of credit or surety bonds. In general, the Company would only be liable for the amounts of these guarantees in the event that nonperformance by the Company permits termination of the related contract by the Company’s client. As of January 2, 2015, the Company had $21 million of outstanding surety bonds and $78 million of outstanding letters of credit relating to these performance guarantees. The Company believes it is in compliance with its performance obligations under all service contracts for which there is a financial performance guarantee, and the ultimate liability, if any, incurred in connection with these guarantees will not have a material adverse effect on its consolidated results of operations or financial position.
	The Company also uses stand-by letters of credit, in lieu of cash, to support various risk management insurance policies. These letters of credit represent a contingent liability and the Company would only be liable if it defaults on its payment obligations towards these policies. As of January 2, 2015, the Company had $59 million of outstanding stand-by letters of credit.
	The following table summarizes the expiration of the Company’s financial guarantees and stand-by letters of credit outstanding as of January 2, 2015:
	(Amounts in millions)	Fiscal 2015		Fiscal 2016		Fiscal 2017 and thereafter		Total
	Surety bonds	$	1	$	20	$	—	$	21
	Letters of credit	9		41		28		78
	Stand-by letters of credit	25		22		12		59
	Total	$	35	$	83	$	40	$	158
	The Company generally indemnifies licensees of its proprietary software products against claims brought by third parties alleging infringement of their intellectual property rights (including rights in patents (with or without geographic limitations), copyright, trademarks and trade secrets). CSC’s indemnification of its licensees relates to costs arising from court awards, negotiated settlements and the related legal and internal costs of those licensees. The Company maintains the right, at its own costs, to modify or replace software in order to eliminate any infringement. Historically, CSC has not incurred any significant costs related to licensee software indemnification.
	Contingencies
	The Company has a contract with the NHS to develop and deploy an integrated patient records system as a part of the U.K. Government's NHS IT program. On August 31, 2012, the Company and NHS entered into a binding interim agreement contract change note, or IACCN, which amended the terms of the then current contract and formed the basis on which the parties finalized a full restatement of the contract. On March 28, 2013, the Company and the NHS signed a letter agreement that modified certain terms of the IACCN. On October 4, 2013, the Company and NHS finalized a full restatement of the contract through a revised project agreement (RPA). The RPA embodies and incorporates the principal terms of the IACCN and such letter agreement, makes certain other changes with respect the Company’s non-Lorenzo product deployments and consolidates the three regional contracts which comprised the Company's NHS contract into a single agreement. See Note 18 for further information relating to the foregoing matters.
	As previously disclosed, on January 28, 2011, the Company was notified by the Division of Enforcement of the SEC that it had commenced a formal civil investigation. That investigation covered a range of matters as previously disclosed by the Company, including certain of the Company’s prior disclosures and accounting determinations. On May 2, 2011, the Audit Committee commenced an independent investigation. The Audit Committee retained independent counsel to represent the Company on behalf of, and under the exclusive direction of, the Audit Committee in connection with such independent investigation. Independent counsel retained forensic accountants and disclosure experts to assist with their work. The Audit Committee determined in August 2012 that its independent investigation was complete. The Audit Committee instructed its independent counsel to cooperate with the SEC's Division of Enforcement by completing production of documents and providing any further information requested by the SEC's Division of Enforcement.
	As a result of findings by the Audit Committee’s independent investigation, the Company has previously acknowledged certain historic errors and irregularities relating to accounting entries arising from the Nordics region, Australia, and the Company’s contractual relationship with the NHS, self-reported these errors and irregularities to the SEC’s Division of Enforcement, and made adjustments to its financial statements that are related to prior periods as reported in its past filings. In addition, as previously disclosed, certain personnel in certain foreign operations were reprimanded, suspended, terminated and/or resigned and additional controls were implemented. Based on recommendations from the Audit Committee’s independent investigation, the Company also instituted comprehensive enhancements beginning in 2011 to its compliance, financial and disclosure controls, and to the function of internal audit. In doing so, the Company made significant changes to prevent the type of misconduct identified by the Audit Committee’s independent investigation from recurring. The Company previously took significant steps to enhance its compliance culture and to remediate any deficiencies through: (1) Company-wide communications concerning the Company’s key organizational values of ethics, compliance and integrity; (2) strengthening internal controls and processes to further ensure the accuracy and integrity of the Company’s financial reporting; (3) improving technical training for employees in finance and accounting roles; (4) a restructuring of the internal audit group and the outsourcing of many internal audit activities to Ernst & Young to enhance the quality and scalability of the Company’s overall internal audit function; (5) creating an independent investigations unit at the Company to investigate suspected violations of the law or the Company's Code of Conduct; (6) elevating the position of Chief Compliance and Ethics Officer to provide direct reporting to the Audit Committee; (7) creating a new position of Chief Accounting Officer responsible for developing accounting policies and reviewing complex technical accounting issues; and (8) revising policies and procedures concerning POC accounting to enhance the review and monitoring of long-term contracts, including those contracts similar to the contract with NHS.
	The Company has been in continuing discussions with the SEC’s staff concerning a potential resolution of the SEC’s investigation. Many of those discussions have concerned the Company’s prior use in fiscal 2009-2012 of the terms of ongoing NHS contract negotiations in developing its assumptions and judgments with respect to the margin used in recognizing profit under the POC accounting method and in evaluating the recoverability of NHS contract assets as well as the Company’s prior disclosures concerning such matters.
	As previously disclosed, the Company has reached an understanding with the staff of the SEC regarding a settlement. Based on that understanding, the SEC will file an administrative enforcement action alleging violations of the antifraud, reporting, and books-and-records provisions of the U.S. securities laws. The Company would neither admit nor deny the allegations, but would agree to cease-and-desist from committing or causing any violations or future violations of those provisions.
	Pursuant to this understanding, the Company intends to restate its financial statements for fiscal 2012 and its summary financial results for fiscal 2011 and fiscal 2010 reflected in the five-year selected financial data table, all as set forth in CSC’s Form 10-K for the fiscal year ended March 28, 2014. The restatement will have no impact on the Company’s financial statements for fiscal 2013 or fiscal 2014 or the first, second or third quarters of fiscal 2015. Subject to formal SEC authorization of the proposed settlement, CSC intends to file its Form 10-K/A for the fiscal year ended March 28, 2014 reflecting the restatement as soon as practicable thereafter. The Board of Directors of the Company determined that the Company's previously issued consolidated financial statements for fiscal 2009-2012 (including the associated auditors' reports and the interim periods within those years) should no longer be relied upon.
	The restatement will reflect the Company's acknowledgment that there were accounting errors in fiscal 2009-2012 with respect to certain assumptions under the POC accounting method for the NHS contract. As part of the restatement, the Company will revise those assumptions based upon uncertainty with respect to a range of possible final outcomes under the NHS contract. As a result, the Company will revise the accounting based on the impracticality of estimating a specific level of profit during this period in order to reflect a profit margin of zero under the POC accounting rules. The result is that approximately $130 million of operating profit is no longer recognized in prior years, thereby reducing the impairment charge previously recorded in fiscal 2012 by approximately that same amount.
	Further, as part of the settlement discussions, the SEC’s staff has advised the Company that it has concluded that the Company should have recorded the previously disclosed impairment charge related to the NHS contract in fiscal 2011 instead of fiscal 2012. The Company’s restatement accordingly will reflect an impairment charge of approximately $1.16 billion in fiscal 2011, reducing the impairment charge previously recognized in fiscal 2012. Due to this modification, the Company also will move $2.51 billion of the previously disclosed fiscal 2012 goodwill impairment charge of approximately $2.75 billion to fiscal 2011.
	The anticipated result of the restatement is to reduce net income by approximately $50 million in fiscal 2010 and approximately $3.69 billion in fiscal 2011 and to increase net income in fiscal 2012 by approximately $3.90 billion.
	As part of the Company’s understanding with the staff of the SEC regarding terms of the settlement, the Company also has agreed to pay a penalty of $190 million and to implement a review of its compliance policies through an independent compliance consultant. The Company has recorded a pre-tax charge of approximately $195 million for the penalty and related expenses in its third quarter of fiscal 2015.
	Final resolution of these matters is subject to the preparation and negotiation of documentation satisfactory to the Company and the SEC, including formal authorization by the SEC. If we do not reach final settlement on the expected terms or if the necessary approvals do not occur, either we may enter into further discussions with the SEC to resolve the matters under investigation on different terms and conditions or we may litigate the matters. We cannot predict the timing or terms of any such further discussions or resolution or the outcome of any subsequent litigation with the government, but any such resolution or outcome could have an adverse impact on the Company's reputation, business, financial condition, results of operation or cash flows.
	See Note 5 for further information.
	On March 1, 2012, the Company was competitively awarded the Maryland Medicaid Enterprise Restructuring Project (“MERP”) contract by the State of Maryland (the State) to modernize the Medicaid Management Information System ("MMIS"), a database of Medicaid recipients and providers used to manage Medicaid reimbursement claims. The MERP contract is predominately fixed price. Also, since awarded, federal government-mandated Medicaid information technology standards have been in considerable flux. The State has directed the Company to include additional functionality in the design to incorporate new federal mandates and guidance promulgated after the base scope of the Contract was finalized. Further, the State has declined to approve contract modifications to compensate the Company for the additional work.
	As a result of the State’s refusal to amend the MERP contract and equitably adjust the compensation to be paid to the Company and, in accordance with prescribed State statutes and regulations, the Company timely filed a certified contract claim with the State in the total estimated amount of approximately $61 million on September 27, 2013 (Contract Claim #1). On February 14, 2014, the Company filed Contract Claim #1A, which amends Contract Claim #1, to a claim of approximately $34 million. The Company believes it has valid and reasonable factual and legal bases for Contract Claims #1 and 1A and that the circumstances that have led or will lead to the Company’s additional costs set forth in Contract Claims #1 and 1A were unforeseen as of the operative proposal submission dates and are not the result of deficiencies in CSC’s performance. However, the Company’s position is subject to the ongoing evaluation of new facts and information which may come to the Company’s attention should an appeal of the State's denial of Contract Claims #1 and 1A be litigated before the Maryland State Board of Contract Appeals (the State Board).
	On February 19, 2014, the State provided a recommended decision denying Contract Claims #1 and 1A to the Company. The February 19, 2014 recommended decision was not a final agency determination on the claims. On April 29, 2014, the State provided a final decision, dated April 25, 2014, denying the claims to the Company. On May 28, 2014, the Company filed a Notice of Appeal with the State Board, which has exclusive initial jurisdiction of State contract claims concerning breach, performance, modification, or termination of contracts procured under Title II of Maryland's General Procurement Law. The appeal is currently pending before the State Board.
	On August 22, 2014, the State unilaterally suspended performance under the Contract for 90 days. On September 12, 2014, the State modified its August 22nd suspension of the Contract and authorized CSC, during the remainder of the 90-day suspension, to assign up to nine full-time-equivalent staff to perform various analyses of cost and schedule. On November 20, 2014, the State sent a letter extending the Suspension until January 5, 2015, and on January 2, 2015, the State again extended the Suspension until February 20, 2015.
	As the result of the 90-day suspension, as extended, and other actions and inactions by the State in performance of its obligations under and management of the Contract, the Company filed a second set of Claims with the State Board (Claims #2A-D). Claim #2A, in the amount of $77 million, asserts that the Company's contractual undertaking did not include an agreement to receive reduced and delayed payments, and the State's unilateral imposition of such reductions and delays, together with the other factors result in a material change to the Contract entitling the Company to compensation for all costs incurred to date, including all liabilities incurred, and fee, as well as expected profit under the full contract. Alternatively, Claim #2B, in the amount of $65 million, asserts that the Maryland General Assembly's reduction to the appropriations for the MERP Project for fiscal 2015 effectively cancels the MERP Contract, entitling the Company to recover all costs incurred to date including all liabilities incurred, and a reasonable allowance for profit on costs and liabilities. Similarly, Claims #2C, also in the amount of $65 million, asserts that the State's actions, inactions, and decisions amount to a constructive termination for convenience entitling the Company to recover all costs incurred to date including, all liabilities incurred, and reasonable allowance for profit on costs and liabilities. Claim #2D is a claim for suspension costs during the 90-day period of $3 million, including labor costs, facilities costs and other costs needed to remain ready to re-start program. Due to the new claims, management assessed the adequacy of contract reserves and concluded that such reserves were adequate.
	On October 27, 2014, the United States District Court for the Southern District of New York unsealed a qui tam complaint that had been filed under seal over two years prior in a case entitled United States of America and State of New York ex rel. Vincent Forcier v. Computer Sciences Corporation and The City of New York, Case No. 1:12-cv-01750-DAB. The original complaint was brought by Vincent Forcier, a former employee of Computer Sciences Corporation, as a private party qui tam relator on behalf of the United States and the State of New York. The relator’s amended complaint, dated November 15, 2012, which remained under seal until October 27, 2014, alleged civil violations of the federal False Claims Act, 31 U.S.C. § 3729 et seq., and New York State’s False Claims Act, NY. Finance L, Art. 13, § 187 et seq., arising out of certain coding methods employed with respect to claims submitted by the Company to Medicaid for reimbursements as fiscal agent on behalf of its client, New York City’s Early Intervention Program (EIP). EIP is a federal program promulgated by the Individuals with Disabilities in Education Act, 20 U.S.C. § 1401 et seq. (IDEA), that provides early intervention services for infants and toddlers who have, or are likely to have, developmental delays.
	Prior to the unsealing of the complaint on October 27, 2014, the United States Attorney’s Office for the Southern District of New York investigated the allegations in the qui tam relator’s complaint. That investigation included requests for information to the Company concerning the Company’s databases, software programs, and related documents regarding EIP claims submitted by the Company on behalf of New York City. The Company produced documents and information that the government requested and cooperated fully with the government’s investigation regarding this matter at all times. In addition, the Company conducted its own investigation of the matter, and openly shared its findings and worked constructively with all parties to resolve the matter. At the conclusion of its investigation, the Company concluded that it had not violated the law in any respect.
	On October 27, 2014, the United States Attorney’s Office for the Southern District of New York and the Attorney General for the State of New York filed complaints-in-intervention on behalf of the United States and the State of New York, respectively. The complaints allege that, from 2008 to 2012, the Company and New York City used the automatic defaulting capabilities of a computerized billing system that the Company developed for New York City’s EIP in order to orchestrate a billing fraud against Medicaid. The New York Attorney General’s complaint also alleges that the Company did not comply with Medicaid requirements regarding submission of claims to private insurance and failed to reimburse Medicaid in certain instances where insurance had paid a portion of the claim. The lawsuits seek damages under the False Claims Act and common law theories in an amount equal to three times the sum of an unspecified amount of damages the United States and New York State allegedly sustained, plus civil penalties together with attorneys’ fees and costs. The Company believes that the allegations are without merit and intends to vigorously defend itself.
	Publicity surrounding the foregoing could have an adverse impact on the Company’s reputation, financial condition, results of operations or cash flows. The Company is unable to estimate with confidence or certainty any possible loss or range of loss associated with these matters at this time.
	In addition to the matters noted above, the Company is currently party to a number of disputes which involve or may involve litigation. The Company accrues a liability when management believes that it is both probable that a liability has been incurred and the amount of loss can be reasonably estimated under ASC 450. The Company believes it has appropriately recognized liabilities for any such matters. Regarding other matters that may involve actual or threatened disputes or litigation, the Company, in accordance with the applicable reporting requirements, provides disclosure of such matters for which the likelihood of material loss is at least reasonably possible.
	The Company also considered the requirements regarding estimates used in the disclosure of contingencies under ASC Subtopic 275-10, Risks and Uncertainties. Based on that guidance, the Company determined that supplemental accrual and disclosure was not required for a change in estimate that involve contingencies because the Company determined that it was not reasonably possible that a change in estimate will occur in the near term. The Company reviews contingencies during each interim period and adjusts its accruals to reflect the impact of negotiations, settlements, rulings, advice of legal counsel, and other information and events pertaining to a particular case.

Basis_of_Presentation_Tables

Basis of Presentation (Tables)	9 Months Ended
	Jan. 02, 2015
Basis of Presentation [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	The Company's income from continuing operations, before taxes and noncontrolling interest, and diluted earnings (loss) per share (EPS) from continuing operations, included the following adjustments due to changes in estimated profitability on fixed price contracts accounted for under the percentage-of-completion method, for the quarters and nine months ended January 2, 2015 and December 27, 2013:
		Quarter Ended						Nine Months Ended
	(Amounts in millions, except per-share data)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Gross favorable	$	17		$	26		$	89		$	101
	Gross unfavorable	(3		)	(12		)	(20		)	(38		)
	Total net adjustments, before taxes and non-controlling interest	$	14		$	14		$	69		$	63
	Impact on diluted EPS from continuing operations	$	0.06		$	0.06		$	0.27		$	0.26

Defined_Benefit_Pension_Plan_A1

Defined Benefit Pension Plan Accounting Policy Change (Tables)	9 Months Ended
	Jan. 02, 2015
Accounting Changes and Error Corrections [Abstract]
Schedule of Changes in Accounting Principles	The following tables present the effects of retrospectively applying the change in the pension accounting policies, on select line items of the accompanying unaudited Consolidated Condensed Financial Statements:
	Impact on Consolidated Condensed Statements of Operations
		Quarter ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	2,299		$	2,530			$	231
	Selling, general and administrative expenses	333			356				23
	Loss from continuing operations, before taxes	(164		)	(418		)		(254		)
	Taxes on income	6			(105		)		(111		)
	Loss from continuing operations	(170		)	(313		)		(143		)
	Net loss	(170		)	(313		)		(143		)
	Net loss attributable to CSC common stockholders	(171		)	(314		)		(143		)
	Basic EPS - Continuing operations	$	(1.22	)	$	(2.23	)		$	(1.01	)
	Diluted EPS - Continuing operations	$	(1.22	)	$	(2.23	)		$	(1.01	)
		Quarter ended December 27, 2013
		As previously reported			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	2,362		$	2,261			$	(101	)
	Selling, general & administrative expenses	354			318				(36		)
	Income from continuing operations, before taxes	221			358				137
	Taxes on income	70			77				7
	Income from continuing operations	151			281				130
	Net income	146			276				130
	Net income attributable to CSC common stockholders	141			271				130
	Basic EPS - Continuing operations	$	0.99		$	1.88			$	0.89
	Diluted EPS - Continuing operations	$	0.98		$	1.84			$	0.86
	Diluted EPS - Discontinued operations	$	(0.04	)	$	(0.03	)		$	0.01
		Nine months ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	6,907		$	7,101			$	194
	Selling, general and administrative expenses	1,028			1,046				18
	Income from continuing operations, before taxes	253			41				(212		)
	Taxes on income	118			18				(100		)
	Income from continuing operations	135			23				(112		)
	Net income	106			(6		)		(112		)
	Net income (loss) attributable to CSC common stockholders	95			(17		)		(112		)
	Basic EPS - Continuing operations	$	0.88		$	0.08			$	(0.80	)
	Diluted EPS - Continuing operations	$	0.86		$	0.08			$	(0.78	)
		Nine months ended December 27, 2013
		As previously reported			As Reported				Impact of change in accounting method
	(Amounts in millions, except per-share amounts)								Increase/(Decrease)
	Costs of services	$	7,156		$	7,015			$	(141	)
	Selling, general and administrative expenses	962			920				(42		)
	Income from continuing operations, before taxes	648			831				183
	Taxes on income	206			227				21
	Income from continuing operations	442			604				162
	Loss from discontinued operations, net of taxes	72			91				19
	Net income	514			695				181
	Net income attributable to noncontrolling interest, net of tax	14			18				4
	Net income attributable to CSC common stockholders	500			677				177
	Basic EPS - Continuing operations	$	2.88		$	3.96			$	1.08
	Basic EPS - Discontinued Operations	$	0.49		$	0.61			$	0.12
	Diluted EPS - Continuing operations	$	2.83		$	3.88			$	1.05
	Diluted EPS - Discontinued operations	$	0.48		$	0.6			$	0.12
	Impact on Consolidated Condensed Statements of Comprehensive (Loss) Income
		Quarter ended January 2, 2015
		Previous accounting methods			As Reported				Impact of change in accounting method
	(Amounts in millions)								Increase/(Decrease)
	Net loss	$	(170	)	$	(313	)		$	(143	)
	Foreign currency translation adjustments	(78		)	(90		)		(12		)
	Pension and other post-retirement benefit plans, net of taxes	(103		)	52				155
	Other comprehensive loss, net of taxes	(183		)	(40		)		143
		Quarter ended December 27, 2013
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income	$	146		$	276			$	130
Foreign currency translation adjustments	(3		)	(9		)		(6		)
Pension and other post-retirement benefit plans, net of taxes	399			260				(139		)
Other comprehensive income, net of taxes	396			251				(145		)
Comprehensive income	542			527				(15		)
Comprehensive income attributable to noncontrolling interest	5			5				—
Comprehensive income attributable to CSC common stockholders	537			522				(15		)
	Nine months ended January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income (loss)	$	106		$	(6	)		$	(112	)
Foreign currency translation adjustments	(168		)	(189		)		(21		)
Pension and other post-retirement benefit plans, net of taxes	(85		)	48				133
Other comprehensive loss, net of taxes	(261		)	(149		)		112
	Nine months ended December 27, 2013
	As previously reported			As Reported			Impact of change in accounting method
(Amounts in millions)							Increase/(Decrease)
Net income	$	514		695			$	181
Foreign currency translation adjustments	(90		)	(93	)		(3		)
Pension and other post-retirement benefit plans, net of taxes	460			260			(200		)
Other comprehensive income, net of taxes	370			167			(203		)
Comprehensive income	884			862			(22		)
Comprehensive income attributable to noncontrolling interest	18			27			9
Comprehensive income attributable to CSC common stockholders	866			835			(31		)
Impact on Consolidated Condensed Balance Sheets
	As of January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Earnings retained for use in business	$	2,402		$	1,101			$	(1,301	)
Accumulated other comprehensive (loss) income	(1,159		)	141				1,300
Noncontrolling interest in subsidiaries	24			25				1
	As of March 28, 2014
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Earnings retained for use in business	$	2,770		$	1,592			$	(1,178	)
Accumulated other comprehensive (loss) income	(898		)	279				1,177
Noncontrolling interest in subsidiaries	31			32				1
Impact on Consolidated Condensed Statements of Cash Flows
	Nine months ended January 2, 2015
	Previous accounting methods			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income (loss)	$	106		$	(6	)		$	(112	)
Pension & OPEB actuarial & settlement losses (gains)	—			463				463
Decrease in liabilities	(130		)	(481		)		(351		)
	Nine months ended December 27, 2013
	As previously reported			As Reported				Impact of change in accounting method
(Amounts in millions)								Increase/(Decrease)
Net income	$	514		$	695			$	181
Pension & OPEB actuarial & settlement losses (gains)	—			(114		)		(114		)
Gain on dispositions	(83		)	(95		)		(12		)
Decrease in liabilities	(358		)	(413		)		(55		)

Acquisitions_and_Divestitures_

Acquisitions and Divestitures (Tables)	9 Months Ended
	Jan. 02, 2015
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The allocation of the purchase consideration to the assets acquired and liabilities assumed, including the fourth quarter adjustments to the estimated fair value of contingent consideration, is presented below:
	(Amounts in millions)		Estimated Fair Value
	Accounts receivable and other current assets		$	3
	Deferred tax assets		31
	Intangible asset - developed technology		94
	Intangible assets - customer relationships and trade names		10
	Property and equipment and other non-current assets		2
	Deferred revenue and other current liabilities		(4		)
	Deferred tax liabilities		(38		)
	Total identifiable net assets acquired		98
	Goodwill		$	184
	Total purchase consideration		$	282
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination	The amortizable lives associated with the intangible assets acquired are as follows:
	Description	Estimated Useful Lives (Years)
	Developed technology	9
	Customer relationships	3
	Trade names	6-Apr
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	A summary of the results of the discontinued operations is presented below:
			Quarter Ended						Nine Months Ended
			January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Operations
	Revenue		$	—		$	7		$	10		$	227
	(Loss) income from discontinued operations, before taxes		—			(2		)	(11		)	10
	Tax expense		—			1			—			6
	Net (loss) income from discontinued operations		$	—		$	(3	)	$	(11	)	$	4
	Disposal
	(Loss) gain on disposition, before taxes		$	—		$	(2	)	$	(21	)	$	102
	Tax (benefit) expense		—			—			(3		)	15
	(Loss) gain on disposition, net of taxes		$	—		$	(2	)	$	(18	)	$	87
	(Loss) income from discontinued operations, net of taxes		$	—		$	(5	)	$	(29	)	$	91

Investigations_and_Out_of_Peri1

Investigations and Out of Period Adjustments (Tables)	9 Months Ended
	Jan. 02, 2015
Out of period adjustments [Abstract]
Out of period adjustments	The impact of out of period adjustments recorded during fiscal 2015 on select line items of the unaudited Consolidated Condensed Statements of Operations for the quarter and nine months ended January 2, 2015, using the rollover method, is shown below:
		Quarter Ended January 2, 2015
	(Amounts in millions, except per-share amounts)	As Reported				Adjustments			Amount Adjusted
						Increase/			for Removal
						(Decrease)			of Errors
	Revenue	$	2,947			$	(1	)	$	2,946
	Costs of services (excludes depreciation and amortization and restructuring costs)	2,530				3			2,533
	Selling, general and administrative	356				—			356
	Depreciation and amortization	238				—			238
	Restructuring costs	12				—			12
	Interest expense	37				—			37
	Interest income	(4		)		—			(4		)
	Other expense, net	1				—			1
	Income from continuing operations before taxes	(418		)		(4		)	(422		)
	Taxes on income	(105		)		6			(99		)
	Income (loss) from continuing operations	(313		)		(10		)	(323		)
	Loss from discontinued operations, net of taxes	—				—			—
	Net income (loss) attributable to CSC common stockholders	(314		)		(10		)	(324		)
	EPS – Diluted
	Continuing operations	$	(2.23	)		$	(0.07	)	$	(2.30	)
	Discontinued operations	—				—			—
	Total	$	(2.23	)		$	(0.07	)	$	(2.30	)
		Nine Months Ended January 2, 2015
	(Amounts in millions, except per-share amounts)	As Reported				Adjustments			Amount Adjusted
						Increase/			for Removal
						(Decrease)			of Errors
	Revenue	$	9,264			$	9		$	9,273
	Costs of services (excludes depreciation and amortization and restructuring costs)	7,101				22			7,123
	Selling, general and administrative	1,046				—			1,046
	Depreciation and amortization	762				(1		)	761
	Restructuring costs	15				—			15
	Interest expense	112				—			112
	Other expense, net	6				—			6
	Income (loss) from continuing operations before taxes	41				(12		)	29
	Taxes on income	18				5			23
	Income from continuing operations	23				(17		)	6
	Loss from discontinued operations, net of taxes	(29		)		2			(27		)
	Net income (loss) attributable to CSC common stockholders	(17		)		(15		)	(32		)
	EPS – Diluted
	Continuing operations	$	0.08			$	(0.12	)	$	(0.04	)
	Discontinued operations	(0.20		)		0.01			(0.19		)
	Total	$	(0.12	)		$	(0.11	)	$	(0.23	)
	For the nine months ended January 2, 2015, the out of period impact on the unaudited Consolidated Condensed Balance Sheet of the adjustments included in income from continuing operations before taxes under the roll-over method is shown below:
	(Amounts in million)	Increase/Decrease		January 2, 2015
	Receivable, net of allowance for doubtful accounts	Increase		$	5
	Property and Equipment	Decrease		1
	Software, net of accumulated amortization	Decrease		2
	Outsourcing contract costs, net of accumulated amortization	Increase		2
	Other assets	Decrease		3
	Accrued expenses and other current liabilities	Decrease		15
	Deferred revenue and advance contract payments	Increase		4
	The impact of out of period adjustments recorded during fiscal 2014, and the first nine months of fiscal 2015, on select line items of the unaudited Consolidated Condensed Statements of Operations for the quarter and first nine months ended December 27, 2013, using the rollover method, is shown below:
		Quarter Ended December 27, 2013
	(Amounts in millions, except per-share amounts)	As Reported				Adjustments			Amount Adjusted
						Increase/			for Removal
						(Decrease)			of Errors
	Revenue	$	3,228			$	(5	)	$	3,223
	Costs of services (excludes depreciation and amortization and restructuring costs)	2,261				8			2,269
	Selling, general and administrative	318				(1		)	317
	Depreciation and amortization	251				—			251
	Restructuring costs	11				—			11
	Interest expense	38				—			38
	Interest income	(4		)		—			(4		)
	Other (income) expense	(5		)		—			(5		)
Income from continuing operations before taxes	358				(12		)	346
Taxes on income	77				(4		)	73
Income from continuing operations	281				(8		)	273
Income from discontinued operations, net of taxes	(5		)		(3		)	(8		)
Net income attributable to CSC common stockholders	271				(11		)	260
EPS – Diluted
Continuing operations	$	1.84			$	(0.05	)	$	1.79
Discontinued operations	(0.03		)		(0.02		)	(0.05		)
Total	$	1.81			$	(0.07	)	$	1.74
	Nine Months Ended December 27, 2013
(Amounts in millions, except per-share amounts)	As Reported				Adjustments			Amount Adjusted
					Increase/			for Removal
					(Decrease)			of Errors
Revenue	$	9,669			$	17		$	9,686
Costs of services (excludes depreciation and amortization and restructuring costs)	7,015				16			7,031
Selling, general and administrative	920				—			920
Depreciation and amortization	753				(1		)	752
Restructuring costs	33				2			35
Interest expense	112				—			112
Other (income) expense	16				—			16
Income from continuing operations before taxes	831				—			831
Taxes on income	227				(24		)	203
Income from continuing operations	604				24			628
Income from discontinued operations, net of taxes	91				—			91
Net income attributable to CSC common stockholders	677				24			701
EPS – Diluted
Continuing operations	$	3.88			$	0.16		$	4.04
Discontinued operations	0.6				—			0.6
Total	$	4.48			$	0.16		$	4.64
For the nine months ended December 27, 2013, the out of period impact on the unaudited Consolidated Condensed Balance Sheet of the adjustments included in income from continuing operations before taxes under the roll-over method is shown below:
(Amounts in million)	Increase/Decrease		27-Dec-13
Receivable, net of allowance for doubtful accounts	Decrease		$	6
Prepaid expenses and other current assets	Increase		1
Property and Equipment	Decrease		1
Other assets	Increase		1
Accrued payroll and related costs	Decrease		9
Accrued expenses and other current liabilities	Decrease		18
Deferred revenue and advance contract payments	Increase		22
The rollover impact on the pre-tax income (loss) from continuing operations of the recorded out of period adjustments in the first nine months of fiscal 2015, fiscal 2014 and fiscal 2013 is attributable to the following prior fiscal years:
	Increase/(Decrease)
(Amounts in millions)	Fiscal 2013 Adjustments				Fiscal 2014 Adjustments			First Nine Months Fiscal 2015 Adjustments			Total Adjustments
Fiscal 2015	$	—			$	—		$	(12	)	$	(12	)
Fiscal 2014	—				(2		)	13			11
Fiscal 2013	6				4			(1		)	9
Prior fiscal years (unaudited)	(6		)		(2		)	—			(8		)

Earnings_Loss_Per_Share_Tables

Earnings (Loss) Per Share (Tables)	9 Months Ended
	Jan. 02, 2015
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share Basic And Diluted By Common Class	Basic earnings (loss) per common share (EPS) and diluted EPS are calculated as follows:
		Quarter Ended						Nine Months Ended
	(Amounts in millions, except per-share amounts)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Net (loss) income attributable to CSC common stockholders
	From continuing operations	$	(314	)	$	276		$	12		$	586
	From discontinued operations	—			(5		)	(29		)	91
		$	(314	)	$	271		$	(17	)	$	677
	Common share information:
	Weighted average common shares outstanding for basic EPS	140.637			146.735			143.141			148.212
	Dilutive effect of stock options and equity awards	—			2.627			3.182			2.912
	Shares for diluted earnings (loss) per share	140.637			149.362			146.323			151.124
	Earnings (loss) per share – basic and diluted:
	Basic EPS:
	Continuing operations	$	(2.23	)	$	1.88		$	0.08		$	3.96
	Discontinued operations	—			(0.03		)	(0.20		)	0.61
	Total	$	(2.23	)	$	1.85		$	(0.12	)	$	4.57
	Diluted EPS:
	Continuing operations	$	(2.23	)	$	1.84		$	0.08		$	3.88
	Discontinued operations	—			(0.03		)	(0.20		)	0.6
	Total	$	(2.23	)	$	1.81		$	(0.12	)	$	4.48

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended
	Jan. 02, 2015
Fair Value [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following tables present the Company’s assets and liabilities, excluding pension assets, that are measured at fair value on a recurring basis as of January 2, 2015 and March 28, 2014:
		As of January 2, 2015
				Fair Value Hierarchy
	(Amounts in millions)	Fair Value		Level 1		Level 2		Level 3
	Assets:
	Money market funds and money market deposit accounts	$	289	$	289	$	—	$	—
	Time deposits	551		551		—		—
	Derivative instruments	13		—		13		—
	Total assets	$	853	$	840	$	13	$	—
	Liabilities:
	Derivative instruments	$	12	$	—	$	12	$	—
	Total liabilities	$	12	$	—	$	12	$	—
		As of March 28, 2014
				Fair Value Hierarchy
	(Amounts in millions)	Fair Value		Level 1		Level 2		Level 3
	Assets:
	Money market funds and money market deposit accounts	$	717	$	717	$	—	$	—
	Time deposits	693		693		—		—
	Derivative instruments	5		—		5		—
	Total assets	$	1,415	$	1,410	$	5	$	—
	Liabilities:
	Derivative instruments	$	4	$	—	$	4	$	—
	Total liabilities	$	4	$	—	$	4	$	—

Derivative_Instruments_Tables

Derivative Instruments (Tables)	9 Months Ended
	Jan. 02, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of fair values of derivative instruments included in the Consolidated Condensed Balance Sheets	The following table presents the fair values of derivative instruments included on the unaudited Consolidated Condensed Balance Sheets as of January 2, 2015 and March 28, 2014:
		Derivative Assets										Derivative Liabilities
	(Amounts in millions)	Balance sheet line item		As of January 2, 2015				As of March 28, 2014				Balance sheet line item	As of January 2, 2015				As of March 28, 2014
	Derivatives designated for hedge accounting:
	Interest rate	Other assets		$	13			$	3			Other long-term liabilities	$	—			$	—
	Foreign Currency forward contracts	Prepaid expense and other current assets		—				—				Accrued expenses and other current liabilities	8				—
	Total fair value of derivatives designated for hedge accounting			$	13			$	3				$	8			$	—
	Derivatives not designated for hedge accounting:
	Foreign Currency forward contracts	Prepaid expense and other current assets		$	—			$	2			Accrued expenses and other current liabilities	$	4			$	4
	Total fair value of derivatives not designated for hedge accounting			$	—			$	2				$	4			$	4
Schedule of pre-tax gains (losses) related to the fair value hedges and the related hedged items	The following table presents the pre-tax gains (losses) related to the fair value hedges and the related hedged items for the quarters ended January 2, 2015 and December 27, 2013, respectively:
		Derivative Instrument									Hedged Item
	(Amounts in millions)	Statement of Operations line item	Gain (Loss) for the Quarter Ended								Balance Sheet line item		Gain (Loss) for the Quarter Ended
			2-Jan-15				27-Dec-13						2-Jan-15				27-Dec-13
	Interest rate swaps	Other Income (Expense)	$	6			$	(6	)		Debt		$	(6	)		$	6
	The following table presents the pre-tax gains (losses) related to the fair value hedges and the related hedged items, for the nine months ended January 2, 2015 and December 27, 2013, respectively:
		Derivative Instrument									Hedged Item
	(Amounts in millions)	Statement of Operations line item	Gain (Loss) for the Nine Months Ended								Balance Sheet line item		Gain (Loss) for the Nine Months Ended
			2-Jan-15				27-Dec-13						2-Jan-15				27-Dec-13
	Interest rate swaps	Other Income (Expense)	$	10			$	—			Debt		$	(10	)		$	—
Schedule of pre-tax gains (losses) associated with the cash flow hedges, recognized in accumulated OCI	The following table presents the pre-tax gains (losses) associated with the cash flow hedges, recognized in accumulated OCI, for the quarters ended January 2, 2015 and December 27, 2013, respectively:
	(Amounts in millions)	Gain (Loss) recognized in Accumulated OCI (effective portion) for the Quarter Ended								Gain (Loss) reclassified into cost of services from Accumulated OCI (effective portion) for the Quarter Ended								Gain (loss) recognized in Other Income (Expense) (ineffective portion) for the Quarter Ended
		2-Jan-15				27-Dec-13				2-Jan-15				27-Dec-13				2-Jan-15		27-Dec-13
	Foreign currency forward and option contracts	$	(2	)		$	—			$	—			$	—			$	—	$	—
	The following table presents the pre-tax gains (losses) associated with the cash flow hedges, recognized in accumulated OCI, for the nine months ended January 2, 2015 and December 27, 2013, respectively:
	(Amounts in millions)	Gain (Loss) recognized in Accumulated OCI (effective portion) for the Nine Months Ended								Gain (Loss) reclassified into cost of services from Accumulated OCI (effective portion) for the Nine Months Ended								Gain (loss) recognized in Other Income (Expense) (ineffective portion) for the Nine Months Ended
		2-Jan-15				27-Dec-13				2-Jan-15				27-Dec-13				2-Jan-15		27-Dec-13
	Foreign currency forward and option contracts	$	(8	)		$	—			$	—			$	—			$	—	$	—
Schedule of pretax amounts affecting income related to derivatives not designated for hedge accounting	The following table presents the pretax amounts affecting income related to derivatives not designated for hedge accounting for the quarters ended January 2, 2015 and December 27, 2013, respectively:
				Quarter Ended								Nine Months Ended
	(Amounts in millions)	Statement of Operations line item		2-Jan-15				27-Dec-13				2-Jan-15				27-Dec-13
	Total return swaps	Cost of services and Selling, general & administrative expenses		$	3			$	—			$	7			$	—
	Foreign currency forwards and options	Other Income (Expense)		—				2				(5		)		(14		)
	Total			$	3			$	2			$	2			$	(14	)

Debt_Tables

Debt (Tables)	9 Months Ended
	Jan. 02, 2015
Debt Disclosure [Abstract]
Schedule of Debt	The following is a summary of the Company's debt as of January 2, 2015 and March 28, 2014:
	(Amounts in millions)	January 2, 2015		March 28, 2014
	4.45% term notes, due September 2022	$	445	$	434
	6.50% term notes, due March 2018	917		917
	2.50% term notes, due September 2015	350		350
	Note payable, due January 2016	389		413
	Mandatorily redeemable preferred stock outstanding	61		61
	Note payable of consolidated subsidiary	68		68
	Capitalized lease liabilities	378		511
	Borrowings for assets acquired under long-term financing	112		98
	Other borrowings	4		36
	Total debt	2,724		2,888
	Less: short term debt and current maturities of long term debt	554		681
	Total long-term debt	$	2,170	$	2,207

Pension_and_Other_PostRetireme1

Pension and Other Post-Retirement Benefit Plans (Tables)	9 Months Ended
	Jan. 02, 2015
Pension And Other Benefit Plans [Abstract]
Schedule of defined benefit plans disclosures	The components of net periodic benefit cost for other post-retirement benefit plans, reported on a global basis, included the following:
		Quarter Ended
	(Amounts in millions)	January 2, 2015			December 27, 2013
	Service cost	$	—		$	1
	Interest cost	2			2
	Expected return on assets	(2		)	(2		)
	Amortization of prior service (credit) costs	(7		)	—
	Recognition of actuarial losses	1			—
	Net provision for post-retirement benefits	$	(6	)	$	1
		Nine Months Ended
	(Amounts in millions)	January 2, 2015			December 27, 2013
	Service cost	$	2		$	3
	Interest cost	6			7
	Expected return on assets	(5		)	(4		)
	Amortization of prior service (credit)	(8		)	(2		)
	Recognition of actuarial losses	1			—
	Settlement (gain)	—			(8		)
	Net provision for post-retirement benefits	$	(4	)	$	(4	)
	The net periodic pension cost (benefit) for U.S. and non-U.S. pension plans included the following components:
		Quarter Ended
		U.S. Plans						Non-U.S. Plans
	(Amounts in millions)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Service cost	$	1		$	1		$	5		$	6
	Interest cost	38			37			29			32
	Expected return on assets	(61		)	(52		)	(44		)	(42		)
	Amortization of transition obligation	—			—			—			1
	Amortization of prior service (credit) cost	—			—			(2		)	—
	Recognition of actuarial losses (gains)	374			—			26			(114		)
	Contractual termination benefits	—			—			(1		)	—
	Settlement loss	56			—			3			—
	Net periodic pension cost (benefit)	$	408		$	(14	)	$	16		$	(117	)
		Nine Months Ended
		U.S. Plans						Non-U.S. Plans
	(Amounts in millions)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Service cost	$	3		$	4		$	17		$	19
	Interest cost	114			112			90			94
	Expected return on assets	(182		)	(162		)	(138		)	(121		)
	Amortization of transition obligation	—			—			1			1
	Amortization of prior service cost (credit)	—			2			(8		)	(2		)
	Recognition of actuarial losses (gains)	375			—			26			(114		)
	Contractual termination benefits	—			—			(8		)	3
	Settlement loss (income)	58			(28		)	3			—
	Net periodic pension cost (benefit)	$	368		$	(72	)	$	(17	)	$	(120	)

Stock_Incentive_Plans_Tables

Stock Incentive Plans (Tables)	9 Months Ended
	Jan. 02, 2015
Stock Incentive Plans [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	For the quarters and nine months ended January 2, 2015 and December 27, 2013, the Company recognized stock-based compensation expense as follows:
			Quarter Ended							Nine Months Ended
	(Amounts in millions)		January 2, 2015				December 27, 2013			January 2, 2015		December 27, 2013
	Cost of services		$	5			$	7		14		$	20
	Selling, general and administrative		14				13			40		33
	Total		$	19			$	20		$	54	$	53
	Total, net of tax		$	12			$	13		$	35	$	34
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions	In calculating the compensation expense for its stock incentive plans, the Company used the following weighted-average assumptions:
		Nine Months Ended
		January 2, 2015			December 27, 2013
	Risk-free interest rate	2.07	%		1.97	%
	Expected volatility	33	%		34	%
	Expected term (in years)	6.22			6.23
	Dividend yield	1.5	%		1.52	%
Disclosure of Share Based Compensation Arrangements by Share Based Payment Award	Information concerning RSUs granted under stock incentive plans is as follows:
		As of January 2, 2015
		Number of			Weighted Average
		Shares			Fair Value per share
	Outstanding as of March 28, 2014	3,187,741				$	41.34
	Granted	982,278				60.79
	Released/Issued	(771,119	)			41.76
	Canceled/Forfeited	(604,159	)			41.51
	Outstanding as of January 2, 2015	2,794,741				48.02
	Information concerning stock options granted under the Company's stock incentive plans is as follows:
		As of January 2, 2015
		Number			Weighted				Weighted	Aggregate
		of Option Shares			Average				Average	Intrinsic
					Exercise				Remaining	Value
					Price				Contractual	(millions)
									Term
	Outstanding as of March 28, 2014	9,829,611			$	43.3			5.73	$	167
	Granted	1,331,361			60.88
	Exercised	(3,507,145	)		44.81					62
	Canceled/Forfeited	(808,695	)		41.39
	Expired	(54,969	)		45.31
	Outstanding as of January 2, 2015	6,790,163			46.18				5.92	116
	Vested and expected to vest in the future as of January 2, 2015	6,622,324			45.92				5.84	115
	Exercisable as of January 2, 2015	4,134,127			44.48				4.15	78
	Information concerning RSUs granted to non-employee directors is as follows:
		As of January 2, 2015
		Number of			Weighted Average
		Shares			Fair Value per share
	Outstanding as of March 28, 2014	184,146				$	42.07
	Granted	22,100				59.63
	Released/Issued	(62,260	)			44.1
	Canceled/Forfeited	—				—
	Outstanding as of January 2, 2015	143,986				43.88

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	9 Months Ended
	Jan. 02, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following tables show the activity in the components of other comprehensive income (loss), including the respective tax effects, and reclassification adjustments for the quarter and nine months ended January 2, 2015 and December 27, 2013, respectively:
	For the quarter ended January 2, 2015	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(90	)	$	—		$	(90	)
	Loss on foreign currency forward contracts	(2		)	—			(2		)
	Pension and other post-retirement benefit plans:
	Prior service credit arising during the year	97			(39		)	58
	Amortization of prior service costs	(9		)	3			(6		)
	Total pension and other post-retirement benefit plans	88			(36		)	52
	Total other comprehensive loss	$	(4	)	$	(36	)	$	(40	)
	For the quarter ended December 27, 2013	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(9	)	$	—		$	(9	)
	Pension and other post-retirement benefit plans:
	Prior service credit	260			—			260
	Amortization of transition obligation	1			—			1
	Amortization of prior service cost	(1		)	—			(1		)
	Total pension and other post-retirement benefit plans	260			—			260
	Total other comprehensive income	$	251		$	—		$	251
	For the nine months ended January 2, 2015	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(188	)	$	(1	)	$	(189	)
	Loss on foreign currency forward and option contracts	(8		)	—			(8		)
	Pension and other post-retirement benefit plans:
	Prior service credit arising during the year	97			(39		)	58
	Amortization of transition obligation	1			—			1
	Amortization of prior service costs	(14		)	3			(11		)
	Total pension and other post-retirement benefit plans	84			(36		)	48
	Total other comprehensive loss	$	(112	)	$	(37	)	$	(149	)
	For the nine months ended December 27, 2013	Before Tax Income (Loss)			Tax Expense			Net of Tax Income (Loss)
	(Amounts in millions)
	Foreign currency translation adjustments	$	(91	)	$	(2	)	$	(93	)
	Pension and other post-retirement benefit plans:
	Net actuarial gain	2			—			2
	Prior service credit	260			—			260
	Amortization of transition obligation	1			—			1
	Amortization of prior service cost	(2		)	—			(2		)
	Foreign currency exchange rate changes	(1		)	—			(1		)
	Total pension and other post-retirement benefit plans	260			—			260
	Total other comprehensive income	$	169		$	(2	)	$	167
Reclassification out of Accumulated Other Comprehensive Income	The following tables show the changes in accumulated other comprehensive income (loss), for the nine months ended January 2, 2015 and December 27, 2013, respectively:
	(Amounts in millions)	Foreign Currency Translation Adjustments			Cash Flow Hedge			Pension and Other Post-retirement Benefit Plans			Accumulated Other Comprehensive Income (Loss)
	Balance at March 28, 2014	$	(6	)	$	—		$	285		$	279
	Current-period other comprehensive (loss) income, net of taxes	(189		)	(8		)	58			(139		)
	Amounts reclassified from accumulated other comprehensive loss, net of taxes	—			—			1			1
	Balance at January 2, 2015	$	(195	)	$	(8	)	$	344		$	141
	(Amounts in millions)	Foreign Currency Translation Adjustments			Pension and Other Post-retirement Benefit Plans			Accumulated Other Comprehensive Income (Loss)
	Balance at March 29, 2013	$	74		$	34		$	108
	Current-period other comprehensive (loss) income, net of taxes	(93		)	261			168
	Amounts reclassified from accumulated other comprehensive loss, net of taxes	—			(10		)	(10		)
	Balance at December 27, 2013	$	(19	)	$	285		$	266

Cash_Flows_Tables

Cash Flows (Tables)	9 Months Ended
	Jan. 02, 2015
Cash Flows [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	Cash payments for interest on indebtedness and cash payments for taxes on income are as follows:
		Nine Months Ended
	(Amounts in millions)	January 2, 2015		December 27, 2013
	Interest	$	88	$	87
	Taxes on income, net of refunds	122		95
Schedule of Other Significant Noncash Transactions	Non-cash investing activities include the following:
		Nine Months Ended
	(Amounts in millions)	January 2, 2015		December 27, 2013
	Capital expenditures in accounts payable and accrued expenses	$	42	$	48
	Capital expenditures through capital lease obligations	10		96
	Assets acquired under long-term financing	74		5

Segment_Information_Tables

Segment Information (Tables)	9 Months Ended
	Jan. 02, 2015
Segment Information [Abstract]
Operating Results by Reportable Segment	The following table summarizes operating results by reportable segment:
	(Amounts in millions)	GBS			GIS			NPS			Corporate			Eliminations		Total
	Quarter ended January 2, 2015
	Revenues	$	965		$	984		$	998		$	—		$	—	$	2,947
	Operating income (loss)	128			72			145			(13		)	—		332
	Depreciation and amortization	37			163			33			5			—		238
	Quarter ended December 27, 2013
	Revenues	$	1,093		$	1,145		$	990		$	—		$	—	$	3,228
	Operating income (loss)	140			91			122			(15		)	—		338
	Depreciation and amortization	34			177			36			4			—		251
	(Amounts in millions)	GBS			GIS			NPS			Corporate			Eliminations		Total
	Nine months ended January 2, 2015
	Revenues	$	3,056		$	3,151		$	3,057		$	—		$	—	$	9,264
	Operating income (loss)	366			211			456			(48		)	—		985
	Depreciation and amortization	116			529			104			13			—		762
	Nine months ended December 27, 2013
	Revenues	$	3,169		$	3,405		$	3,095		$	—		$	—	$	9,669
	Operating income (loss)	373			290			412			(44		)	—		1,031
	Depreciation and amortization	112			520			110			11			—		753
Reconciliation of Consolidated Operating Income to Income Before Taxes	A reconciliation of consolidated operating income to income from continuing operations before taxes is as follows:
		Quarter Ended						Nine Months Ended
	(Amounts in millions)	January 2, 2015			December 27, 2013			January 2, 2015			December 27, 2013
	Operating income (1)	$	332		$	338		$	985		$	1,031
	Corporate G&A	(59		)	(65		)	(182		)	(197		)
	Pension & OPEB actuarial & settlement (losses) gains	(462		)	114			(463		)	114
	SEC settlement related charges (2)	(195		)	—			(195		)	—
	Interest expense	(37		)	(38		)	(112		)	(112		)
	Interest income	4			4			14			11
	Other income (expense), net	(1		)	5			(6		)	(16		)
	(Loss) income from continuing operations before taxes	$	(418	)	$	358		$	41		$	831
	(1) The impact of the change in pension accounting policy was an increase in operating income of $208 million and $251 million for the third quarter and first nine months of fiscal 2015, respectively, and an increase in operating income of $22 million and $68 million for the third quarter and first nine months of fiscal 2014, respectively.
	(2) This item relates to the SEC investigation settlement (see Note 5).
Out of Period Adjustments by Segment	The following tables summarize the effect of the pre-tax out of period adjustments on the GBS, GIS, and NPS segment results for the quarters and nine months ended January 2, 2015 and December 27, 2013, as if the adjustments had been recorded in the appropriate period:
		GBS
	(Amounts in millions)	As Reported			Increase/			As Adjusted
					(Decrease)
	Quarter ended January 2, 2015
	Revenues	$	965		$	(1	)	$	964
	Operating income	128			(4		)	124
	Depreciation and amortization	37			—			37
	Quarter ended December 27, 2013
	Revenues	$	1,093		$	(6	)	$	1,087
	Operating income	140			(7		)	133
	Depreciation and amortization	34			—			34
		GBS
	(Amounts in millions)	As Reported			Increase/			Adjusted
					(Decrease)
	Nine months ended January 2, 2015
	Revenues	$	3,056		$	3		$	3,059
	Operating income	366			5			371
	Depreciation and amortization	116			(1		)	115
	Nine months ended December 27, 2013
	Revenues	$	3,169		$	24		$	3,193
	Operating income	373			22			395
	Depreciation and amortization	112			1			113
		GIS
	(Amounts in millions)	As Reported			Increase/			As Adjusted
					(Decrease)
	Quarter ended January 2, 2015
	Revenues	$	984		$	—		$	984
	Operating income	72			—			72
	Depreciation and amortization	163			—			163
	Quarter ended December 27, 2013
	Revenues	$	1,145		$	(2	)	$	1,143
	Operating income	91			(6		)	85
	Depreciation and amortization	177			—			177
		GIS
	(Amounts in millions)	As Reported			Increase/			Adjusted
					(Decrease)
	Nine months ended January 2, 2015
	Revenues	$	3,151		$	2		$	3,153
	Operating income	211			3			214
	Depreciation and amortization	529			—			529
	Nine months ended December 27, 2013
	Revenues	$	3,405		$	(2	)	$	3,403
	Operating income	290			(5		)	285
	Depreciation and amortization	520			(1		)	519
		NPS
	(Amounts in millions)	As Reported			Increase/			As Adjusted
					(Decrease)
	Quarter ended January 2, 2015
	Revenues	$	998		$	—		$	998
	Operating income	145			—			145
	Depreciation and amortization	33			—			33
	Quarter ended December 27, 2013
	Revenues	$	990		$	2		$	992
	Operating income	122			1			123
	Depreciation and amortization	36			—			36
		NPS
	(Amounts in millions)	As Reported			Increase/			Adjusted
					(Decrease)
	Nine months ended January 2, 2015
	Revenues	$	3,057		$	5		$	3,062
	Operating income	456			(5		)	451
	Depreciation and amortization	104			—			104
	Nine months ended December 27, 2013
Revenues	$	3,095		$	(5	)	$	3,090
Operating income	412			—			412
Depreciation and amortization	110			—			110

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Jan. 02, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in the Carrying Amount of Goodwill by Segment	The following table summarizes the changes in the carrying amount of goodwill by segment for the nine months ended January 2, 2015:
	(Amounts in millions)	GBS			GIS			NPS		Total
	Goodwill, gross	$	1,370		$	2,273		$	788	$	4,431
	Accumulated impairment losses	(690		)	(2,074		)	—		(2,764		)
	Balance as of March 28, 2014, net	680			199			788		1,667
	Additions	—			—			31		31
	Deductions	(2		)	—			—		(2		)
	Foreign currency translation	(27		)	—			—		(27		)
	Goodwill, gross	1,341			2,273			819		4,433
	Accumulated impairment losses	(690		)	(2,074		)	—		(2,764		)
	Balance as of January 2, 2015, net	$	651		$	199		$	819	$	1,669
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	A summary of amortizing intangible assets is as follows:
		As of January 2, 2015
	(Amounts in millions)	Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Outsourcing contract costs	$	1,333		$	1,003		$	330
	Software	2,457			1,681			776
	Customer and other intangible assets	478			323			155
	Total intangible assets	$	4,268		$	3,007		$	1,261
		As of March 28, 2014
	(Amounts in millions)	Gross Carrying Value			Accumulated Amortization			Net Carrying Value
	Outsourcing contract costs	$	1,465		$	1,038		$	427
	Software	2,330			1,680			650
	Customer and other intangible assets	588			315			273
	Total intangible assets	$	4,383		$	3,033		$	1,350

Restructuring_Costs_Tables

Restructuring Costs (Tables)	9 Months Ended
	Jan. 02, 2015
Restructuring Costs [Abstract]
Schedule of Restructuring Reserve by Type of Cost	The composition of the restructuring liability for the Fiscal 2015 Plan as of January 2, 2015 is as follows:
	(Amounts in millions)		Restructuring liability as of March 28, 2014		Costs expensed in fiscal 2015			Less: costs not affecting restructuring liability (1)			Cash paid			Other			Restructuring liability as of January 2, 2015
	Workforce reductions		$	—	$	25		$	—		$	(11	)	$	(1	)	$	13
	(1)	Charges primarily consist of pension benefit augmentations and are recorded as a pension liability.
	The composition of the restructuring liability for the Fiscal 2013 Plan as of January 2, 2015 is as follows:
	(Amounts in millions)		Restructuring liability as of March 28, 2014		Costs expensed in fiscal 2015			Less: costs not affecting restructuring liability (1)			Cash paid			Other(2)			Restructuring liability as of January 2, 2015
	Workforce reductions		$	70	$	(12	)	$	7		$	(53	)	$	(2	)	$	10
	Facilities costs		13		2			—			(7		)	—			$	8
			$	83	$	(10	)	$	7		$	(60	)	$	(2	)	$	18
	(1)	Charges consist of pension benefit augmentations and are recorded as a pension liability.
	(2)	Foreign currency translation adjustments.
	The composition of the restructuring liability for the Fiscal 2012 Plan as of January 2, 2015 is as follows:
	(Amounts in millions)		Restructuring liability as of March 28, 2014		Costs expensed in fiscal 2015			Cash paid			Other(1)			Restructuring liability as of January 2, 2015
	Facilities costs		2		—			(2		)	1			1
	Total		$	2	$	—		$	(2	)	$	1		$	1
	(1)	Foreign currency translation adjustments.
Schedule of Restructuring and Related Costs	The composition of restructuring expenses for the third quarter and first nine months of fiscal 2015 and fiscal 2014 by segment is as follows:
			Quarter Ended					Nine Months Ended
	(Amounts in millions)		January 2, 2015		December 27, 2013			January 2, 2015			December 27, 2013
	GBS		$	10	$	7		$	12		$	25
	GIS		1		4			2			10
	NPS		—		—			—			—
	Corporate		1		—			1			(2		)
	Total		$	12	$	11		$	15		$	33
	The composition of restructuring expenses for the third quarter and first nine months of fiscal 2015 and fiscal 2014 by financial statement line item is as follows:
			Quarter Ended					Nine Months Ended
	(Amounts in millions)		January 2, 2015		December 27, 2013			January 2, 2015			December 27, 2013
	Cost of services		$	8	$	4		$	9		$	28
	Selling, general and administrative		4		7			6			5

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Jan. 02, 2015
Commitments and Contingencies Disclosure [Abstract]
Expiration Of Financial Guarantees	The following table summarizes the expiration of the Company’s financial guarantees and stand-by letters of credit outstanding as of January 2, 2015:
	(Amounts in millions)	Fiscal 2015		Fiscal 2016		Fiscal 2017 and thereafter		Total
	Surety bonds	$	1	$	20	$	—	$	21
	Letters of credit	9		41		28		78
	Stand-by letters of credit	25		22		12		59
	Total	$	35	$	83	$	40	$	158

Basis_of_Presentation_Income_B

Basis of Presentation Income Before Income Tax (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Mar. 28, 2014
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Gross favorable	$17	$26	$89	$101
Gross unfavorable	-3	-12	-20	-38
Total net adjustments, before taxes and non-controlling interest	14	14	69	63
Impact on diluted EPS from continuing operations (usd per share)	$0.06	$0.06	$0.27	$0.26
Unbilled recoverable amounts primarily from governments that are expected to be collected after one year	51		51		46
Depreciation expense	$145	$165	$469	$498

Defined_Benefit_Pension_Plan_A2

Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidated Statement of Operations (Details) (USD $)	3 Months Ended		9 Months Ended
	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Mar. 29, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs of services (excludes depreciation and amortization and restructuring costs)	$2,530,000,000	$2,261,000,000	$7,101,000,000	$7,015,000,000
Selling, general and administrative	356,000,000	318,000,000	1,046,000,000	920,000,000
Income from continuing operations before taxes	-418,000,000	358,000,000	41,000,000	831,000,000
Taxes on income	-105,000,000	77,000,000	18,000,000	227,000,000
Income (loss) from continuing operations	-313,000,000	281,000,000	23,000,000	604,000,000
(Loss) income from discontinued operations, net of taxes	0	-5,000,000	-29,000,000	91,000,000
Net (loss) income	-313,000,000	276,000,000	-6,000,000	695,000,000
Net income attributable to noncontrolling interest, net of tax	1,000,000	5,000,000	11,000,000	18,000,000
Net loss attributable to CSC common stockholders	-314,000,000	271,000,000	-17,000,000	677,000,000
Basic EPS - Continuing operations (in dollars per share)	($2.23)	$1.88	$0.08	$3.96
Basic EPS - Discontinued Operations (in dollars per share)	$0	($0.03)	($0.20)	$0.61
Diluted EPS - Continuing operations (in dollars per share)	($2.23)	$1.84	$0.08	$3.88
Diluted EPS - Discontinued operations (in dollars per share)	$0	($0.03)	($0.20)	$0.60
Previous accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net (loss) income			106,000,000
Previous accounting methods [Member] | As previously reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs of services (excludes depreciation and amortization and restructuring costs)	2,299,000,000	2,362,000,000	6,907,000,000	7,156,000,000
Selling, general and administrative	333,000,000	354,000,000	1,028,000,000	962,000,000
Income from continuing operations before taxes	-164,000,000	221,000,000	253,000,000	648,000,000
Taxes on income	6,000,000	70,000,000	118,000,000	206,000,000
Income (loss) from continuing operations	-170,000,000	151,000,000	135,000,000	442,000,000
(Loss) income from discontinued operations, net of taxes				72,000,000
Net (loss) income	-170,000,000	146,000,000	106,000,000	514,000,000
Net income attributable to noncontrolling interest, net of tax				14,000,000
Net loss attributable to CSC common stockholders	-171,000,000	141,000,000	95,000,000	500,000,000
Basic EPS - Continuing operations (in dollars per share)	($1.22)	$0.99	$0.88	$2.88
Basic EPS - Discontinued Operations (in dollars per share)			($0.20)	$0.49
Diluted EPS - Continuing operations (in dollars per share)	($1.22)	$0.98	$0.86	$2.83
Diluted EPS - Discontinued operations (in dollars per share)		($0.04)		$0.48
Impact of change in accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs of services	231,000,000	-101,000,000	194,000,000	-141,000,000
Selling, general and administrative expenses	23,000,000	-36,000,000	18,000,000	-42,000,000
Loss from continuing operations, before taxes	-254,000,000	137,000,000	-212,000,000	183,000,000
Taxes on income	-111,000,000	7,000,000	-100,000,000	21,000,000
Loss from continuing operations	-143,000,000	130,000,000	-112,000,000	162,000,000
Income from discontinued operations, net of taxes		0		19,000,000
Net loss	-143,000,000	130,000,000	-112,000,000	181,000,000
Net income attributable to noncontrolling interest, net of tax				4,000,000
Net loss attributable to CSC common stockholders	-143,000,000	130,000,000	-112,000,000	177,000,000
Basic EPS - Continuing operations (in dollars per share)	($1.01)	$0.89	($0.80)	$1.08
Basic EPS - Discontinued Operations (in dollars per share)			$0	$0.12
Diluted EPS - Continuing operations (in dollars per share)	($1.01)	$0.86	($0.78)	$1.05
Diluted EPS - Discontinued operations (in dollars per share)		$0.01		$0.12
Retained Earnings [Member] | Impact of change in accounting methods [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change on equity from application of new accounting policy					$1,500,000,000

Defined_Benefit_Pension_Plan_A3

Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidated Statement of Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net (loss) income	($313)	$276	($6)	$695
Foreign currency translation adjustments	-90	-9	-189	-93
Pension and other post-retirement benefit plans, net of taxes	52	260	48	260
Other comprehensive loss, net of taxes	-40	251	-149	167
Comprehensive income	-353	527	-155	862
Comprehensive income attributable to noncontrolling interest	1	5	11	27
Comprehensive income attributable to CSC common stockholders	-354	522	-166	835
Previous accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net (loss) income			106
Previous accounting methods [Member] | As previously reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net (loss) income	-170	146	106	514
Foreign currency translation adjustments	-78	-3	-168	-90
Pension and other post-retirement benefit plans, net of taxes	-103	399	-85	460
Other comprehensive loss, net of taxes	-183	396	-261	370
Comprehensive income		542		884
Comprehensive income attributable to noncontrolling interest		5		18
Comprehensive income attributable to CSC common stockholders		537		866
Impact of change in accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net loss	-143	130	-112	181
Foreign currency translation adjustments	-12	-6	-21	-3
Pension and other post-retirement benefit plans, net of taxes	155	-139	133	-200
Other comprehensive loss, net of taxes	143	-145	112	-203
Comprehensive income		-15		-22
Comprehensive income attributable to noncontrolling interest		0		9
Comprehensive income attributable to CSC common stockholders		($15)		($31)

Defined_Benefit_Pension_Plan_A4

Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidated Balance Sheets (Details) (USD $)	Jan. 02, 2015	Mar. 28, 2014	Dec. 27, 2013	Mar. 29, 2013
In Millions, unless otherwise specified
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	$1,000	$986
Earnings retained for use in business	1,101	1,592
Accumulated other comprehensive income	141	279	266	108
Noncontrolling interest in subsidiaries	25	32
Previous accounting methods [Member] | As previously reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Earnings retained for use in business	2,402	2,770
Accumulated other comprehensive income	-1,159	-898
Noncontrolling interest in subsidiaries	24	31
Impact of change in accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Earnings retained for use in business	-1,301	-1,178
Accumulated other comprehensive (loss) income	1,300	1,177
Noncontrolling interest in subsidiaries	$1	$1

Defined_Benefit_Pension_Plan_A5

Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidated Statement of Cash Flows (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net (loss) income	($6)	$695
Pension & OPEB actuarial & settlement losses (gains)	463	-114
Gain on dispositions	-22	-95
Decrease in liabilities	481	413
Previous accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net (loss) income	106
Decrease in liabilities	-130
Previous accounting methods [Member] | As previously reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net (loss) income	106	514
Pension & OPEB actuarial & settlement losses (gains)		0
Gain on dispositions		-83
Decrease in liabilities		-358
Impact of change in accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net loss	-112	181
Pension & OPEB actuarial & settlement losses (gains)		-114
Gain on dispositions		-12
Decrease in liabilities	($351)	($55)

Acquisitions_Details

(Acquisitions) (Details) (USD $)	0 Months Ended		3 Months Ended	0 Months Ended	9 Months Ended
In Millions, except Share data, unless otherwise specified	Jul. 31, 2014	Nov. 15, 2013	Mar. 28, 2014	Aug. 05, 2013	Jan. 02, 2015	Dec. 27, 2013
Business Acquisition [Line Items]
Goodwill, net			$1,667		1,669
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill, net			1,667		1,669
Privately Held Entity [Member]
Business Acquisition [Line Items]
Cash consideration	35
Current assets acquired	4
Intangible assets acquired	9
Current liabilities assumed	9
Total purchase consideration	31
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Intangible assets acquired	9
Total purchase consideration	31
ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Total purchase consideration		282
Cash paid for acquisition		163
Debt retired for acquisition		10
Contingent liability		119
Acquisition related costs		4
Contingent consideration		98
Change in contingent consideration			18
Goodwill, net		184
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Accounts receivable and other current assets		3
Deferred tax assets		31
Property and equipment and other non-current assets		2
Deferred revenue and other current liabilities		4
Deferred tax liabilities		38
Total identifiable net assets acquired		98
Goodwill, net		184
Total purchase consideration		282
InfoChimps Inc [Member]
Business Acquisition [Line Items]
Cash consideration				27
Current liabilities assumed				2
Total purchase consideration				27
Current and long-term assets acquired				2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Total purchase consideration				27
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Contingent consideration						137
Selling, General and Administrative Expenses [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Contingent consideration		21
GBS Segment [Member]
Business Acquisition [Line Items]
Goodwill, net			680		651
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill, net			680		651
GBS Segment [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Goodwill, net			28
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill, net			28
GIS Segment [Member]
Business Acquisition [Line Items]
Goodwill, net			199		199
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill, net			199		199
GIS Segment [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Goodwill, net			120
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill, net			120
NPS [Member]
Business Acquisition [Line Items]
Goodwill, net			788		819
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill, net			788		819
NPS [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Goodwill, net			36
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill, net			36
Restricted Stock Units (RSUs) [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Granted (in shares)		41,000,000
Developed Technology Rights [Member]
Intangible Assets - Useful Life [Abstract]
Intangible assets, useful life					9 years
Developed Technology Rights [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Intangible assets acquired		94
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Intangible assets acquired		94
Customer Relationships and Trade Names [Member] | ServiceMesh, Inc [Member]
Business Acquisition [Line Items]
Intangible assets acquired		10
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Intangible assets acquired		$10
Customer Relationships [Member]
Intangible Assets - Useful Life [Abstract]
Intangible assets, useful life					3 years
Minimum [Member] | Trade Names [Member]
Intangible Assets - Useful Life [Abstract]
Intangible assets, useful life					4 years
Maximum [Member] | Trade Names [Member]
Intangible Assets - Useful Life [Abstract]
Intangible assets, useful life					6 years

Discontinued_Operations_Detail

(Discontinued Operations) (Details) (USD $)	3 Months Ended			9 Months Ended		0 Months Ended			3 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Jul. 04, 2014	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Jul. 31, 2014	Jul. 19, 2013	21-May-13	Mar. 28, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds for sale of business				($13)	$245
Balance as of March 28, 2014, net	1,669			1,669					1,667
Proceeds from divestiture of business, working capital adjustment		1
Proceeds from divestiture of business, purchase price adjustment		2
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Revenue	0		7	10	227
(Loss) income from discontinued operations, before taxes	0		-2	-11	10
Tax expense	0		1	0	6
Net (loss) income from discontinued operations	0		-3	-11	4
(Loss) gain on disposition, before taxes	0		-2	-21	102
Tax (benefit) expense	0		0	-3	15
(Loss) gain on disposition, net of taxes	0		-2	-18	87
Income from discontinued operations, net of taxes	0		-5	-29	91
Impact of change in accounting methods [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of taxes			0		19
European Healthcare [Member] | European GBS - IS&S [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds for sale of business						3
Gain (Loss) on disposal of discontinued operations						-22
Disposal group current assets						54
Disposal group cash						21
Balance as of March 28, 2014, net						0
Disposal group other noncurrent assets						25
Disposal group current liabilities						33
Disposal group noncurrent liabilities						23
NPS Applied Technology Division [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds for sale of business							178
Proceeds from divestiture of business, working capital adjustment							6
Net of cash divested							77
Flood-Insurance-Related Business Process Outsourcing Practice [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds for sale of business								43
Gain (Loss) on disposal of discontinued operations									-1
Proceeds from divestiture of business, working capital adjustment								4	3
Net of cash divested								$25

Investigations_and_Out_of_Peri2

Investigations and Out of Period Adjustments (Textual) (Details) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

36 Months Ended

Jan. 02, 2015

Dec. 27, 2013

Dec. 30, 2011

Jan. 02, 2015

Dec. 27, 2013

Apr. 01, 2011

Mar. 30, 2012

Sep. 27, 2013

Jun. 28, 2013

Sep. 27, 2013

Apr. 02, 2010

Apr. 01, 2011

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Change in operating loss (income)

$1,500,000,000

Settlement charge

195,000,000

0

195,000,000

0

Income from continuing operations before taxes

-418,000,000

358,000,000

41,000,000

831,000,000

Net tax benefit

105,000,000

-77,000,000

-18,000,000

-227,000,000

Net income attributable to CSC common stockholders

314,000,000

-271,000,000

17,000,000

-677,000,000

Adjustment Increase/(Decrease) [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Income from continuing operations before taxes

-4,000,000

-12,000,000

0

Net tax benefit

-6,000,000

4,000,000

24,000,000

Net income attributable to CSC common stockholders

10,000,000

11,000,000

15,000,000

-24,000,000

Miscellaneous errors [Member] | Restatement Adjustment [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Goodwill impairment

2,510,000,000

Miscellaneous errors [Member] | As previously reported [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Goodwill impairment

2,750,000,000

Fiscal 2014 Adjustments [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-5,000,000

-12,000,000

-3,000,000

Quantifying Misstatement in Current Year Financial Statements, Amount, Net of Tax, Including Discrete Tax Benefits, (Income)/loss

11,000,000

2,000,000

Fiscal 2014 Adjustments [Member] | Discrete Tax Benefits [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Adjustment to taxes recorded in period

1,000,000

9,000,000

9,000,000

Fiscal 2014 Adjustments [Member] | Out of Period Adjustments to Tax Expense [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Adjustment to taxes recorded in period

0

12,000,000

Fiscal 2014 Adjustments [Member] | Adjustment to Recognize Revenue on Previously Delivered Software Products and Services [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-1,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Cost of Sales [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

7,000,000

13,000,000

Fiscal 2014 Adjustments [Member] | Adjustments Relating to Previously Delivered Software Products and Services [Member] | Adjustments Decrease [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

2,000,000

Fiscal 2014 Adjustments [Member] | Uncertain Tax Positions, Tax Restructuring [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Adjustment to taxes recorded in period

10,000,000

10,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Revenues and Costs [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

9,000,000

-9,000,000

Quantifying Misstatement in Current Year Financial Statements, Amount, Net of Tax, Including Discrete Tax Benefits, (Income)/loss

20,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Prepaid and Accrual Balances [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-5,000,000

6,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Software Products and Services [Member] | Adjustments Decrease [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-3,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Pension Accrual [Member] | Adjustments Decrease [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-4,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Revenues Accounted for Under Percentage of Completion [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

3,000,000

3,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Selling, General and Administrative Expenses [Member] | Adjustments Decrease [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

3,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Selling, General and Administrative Expenses [Member] | Adjustments Increase [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

1,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Deferred Costs [Member] | Adjustments Decrease [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

4,000,000

Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Capitalization Costs [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

1,000,000

Fiscal 2014 Adjustments [Member] | GBS and GIS Segments [Member] | Adjustments Increase [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

2,000,000

Fiscal 2014 Adjustments [Member] | GBS and GIS Segments [Member] | Other Adjustments [Member] | Adjustments Increase [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-14,000,000

Fiscal 2014 Adjustments [Member] | GBS [Member] | Adjustments for Inappropriately Recognized Revenues and Costs [Member] | Adjustments Decrease [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

13,000,000

Fiscal 2014 Adjustments [Member] | GBS [Member] | Adjustments for Inappropriately Recognized Deferred Costs [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

1,000,000

Fiscal 2014 Adjustments [Member] | GBS [Member] | Adjustment for Understated Payroll and Related Expense [Member] | Adjustments Increase [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-8,000,000

Fiscal 2015 Adjustments [Member] | Discrete Tax Benefits [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Adjustment to taxes recorded in period

5,000,000

Adjustments Relating To Prior Fiscal Years [Member] | Fiscal 2014 Adjustments [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Quantifying Misstatement in Current Year Financial Statements, Amount, Net of Tax, Including Discrete Tax Benefits, (Income)/loss

-4,000,000

18,000,000

Adjustments Relating To Prior Fiscal Years [Member] | Fiscal 2014 Adjustments [Member] | Adjustment to Recognize Revenue on Previously Delivered Software Products and Services [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-6,000,000

Adjustments Relating To Prior Fiscal Years [Member] | Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Cost of Sales [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

2,000,000

Adjustments Relating To Prior Fiscal Years [Member] | Fiscal 2014 Adjustments [Member] | Adjustment to Recognize Revenue on Previously Delivered Outsourcing Service [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-1,000,000

Adjustments Relating To Prior Fiscal Years [Member] | Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Revenues and Costs [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

11,000,000

Adjustments Relating to First Six Months of Fiscal 2014 [Member] | Fiscal 2014 Adjustments [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Quantifying Misstatement in Current Year Financial Statements, Amount, Net of Tax, Including Discrete Tax Benefits, (Income)/loss

-9,000,000

Adjustments Relating to First Six Months of Fiscal 2014 [Member] | Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Revenues and Costs [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-7,000,000

Adjustments Relating to First Quarter of Fiscal 2014 [Member] | Fiscal 2014 Adjustments [Member] | Adjustments for Inappropriately Recognized Revenues and Costs [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

17,000,000

Adjustments Relating to First Nine Months of Fiscal 2014 [Member] | Fiscal 2014 Adjustments [Member] | NPS [Member] | Adjustments Increase [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

3,000,000

Contracts Accounted for under Percentage of Completion, U.S. Claims [Member] | NHS contract [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Change in operating loss (income)

1,160,000,000

130,000,000

Change in net loss (income)

3,690,000,000

-3,900,000,000

50,000,000

Penalty related to SEC settlement

190,000,000

Settlement charge

195,000,000

Sales [Member] | Adjustments Relating To Prior Fiscal Years [Member] | Fiscal 2014 Adjustments [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

-7,000,000

Cost of Sales [Member] | Fiscal 2014 Adjustments [Member] | Adjustments Relating to Previously Delivered Software Products and Services [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

5,000,000

Cost of Sales [Member] | Fiscal 2014 Adjustments [Member] | Adjustments Relating to Margin Correction on Long-Term Contracts [Member]

Quantifying Misstatement in Current Year Financial Statements [Line Items]

Cumulative Quantifying Misstatement in Current Year Financial Statements, Amount, (Income)/loss

$3,000,000

Investigations_and_Out_of_Peri3

Investigations and Out of Period Adjustments (Rollover impact on Income (loss) from continuing operations, before taxes and Impact on Foreign Adjustments) (Details) (Other errors [Member], USD $)	9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015
Fiscal 2015 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	($12)
Fiscal 2014 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	11
Fiscal 2013 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	9
Prior fiscal years (unaudited) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	-8
Fiscal 2013 Adjustments [Member] | Fiscal 2015 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	0
Fiscal 2013 Adjustments [Member] | Fiscal 2014 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	0
Fiscal 2013 Adjustments [Member] | Fiscal 2013 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	6
Fiscal 2013 Adjustments [Member] | Prior fiscal years (unaudited) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	-6
Fiscal 2014 Adjustments [Member] | Fiscal 2015 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	0
Fiscal 2014 Adjustments [Member] | Fiscal 2014 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	-2
Fiscal 2014 Adjustments [Member] | Fiscal 2013 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	4
Fiscal 2014 Adjustments [Member] | Prior fiscal years (unaudited) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	-2
First Nine Months Fiscal 2015 Adjustments [Member] | Fiscal 2015 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	-12
First Nine Months Fiscal 2015 Adjustments [Member] | Fiscal 2014 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	13
First Nine Months Fiscal 2015 Adjustments [Member] | Fiscal 2013 [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	-1
First Nine Months Fiscal 2015 Adjustments [Member] | Prior fiscal years (unaudited) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Amount of pre-tax adjustment	$0

Investigations_and_Out_of_Peri4

Investigations and Out of Period Adjustments (Impact on Consolidated Statement of Operations) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenues	$2,947	$3,228	$9,264	$9,669
Costs of services (excludes depreciation and amortization and restructuring costs)	2,530	2,261	7,101	7,015
Selling, general and administrative	356	318	1,046	920
Depreciation and amortization	238	251	762	753
Restructuring costs	12	11	15	33
Interest expense	37	38	112	112
Interest income	-4	-4	-14	-11
Other (income) expense, net	1	-5	6	16
(Loss) income from continuing operations, before taxes	-418	358	41	831
Taxes on income	-105	77	18	227
(Loss) income from continuing operations	-313	281	23	604
(Loss) income from discontinued operations, net of taxes	0	-5	-29	91
Net (loss) income attributable to CSC common stockholders	-314	271	-17	677
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)	($2.23)	$1.84	$0.08	$3.88
Discontinued operations (in dollars per share)	$0	($0.03)	($0.20)	$0.60
Diluted EPS (in dollars per share)	($2.23)	$1.81	($0.12)	$4.48
Adjustment Increase/(Decrease) [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenues	-1	-5	9	17
Costs of services (excludes depreciation and amortization and restructuring costs)	3	8	22	16
Selling, general and administrative	0	-1	0	0
Depreciation and amortization	0	0	-1	-1
Restructuring costs	0	0	0	2
Interest expense	0	0	0	0
Interest income	0	0
Other (income) expense, net	0	0	0	0
(Loss) income from continuing operations, before taxes	-4	-12		0
Taxes on income	6	-4		-24
(Loss) income from continuing operations	-10	-8	-17	24
(Loss) income from discontinued operations, net of taxes	0	-3	2	0
Net (loss) income attributable to CSC common stockholders	-10	-11	-15	24
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)	($0.07)	($0.05)	($0.12)	$0.16
Discontinued operations (in dollars per share)	$0	($0.02)	$0.01	$0
Diluted EPS (in dollars per share)	($0.07)	($0.07)	($0.11)	$0.16
Amount Adjusted for Removal of Errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenues	2,946	3,223	9,273	9,686
Costs of services (excludes depreciation and amortization and restructuring costs)	2,533	2,269	7,123	7,031
Selling, general and administrative	356	317	1,046	920
Depreciation and amortization	238	251	761	752
Restructuring costs	12	11	15	35
Interest expense	37	38	112	112
Interest income	-4	-4
Other (income) expense, net	1	-5	6	16
(Loss) income from continuing operations, before taxes	-422	346	29	831
Taxes on income	-99	73	23	203
(Loss) income from continuing operations	-323	273	6	628
(Loss) income from discontinued operations, net of taxes	0	-8	-27	91
Net (loss) income attributable to CSC common stockholders	($324)	$260	($32)	$701
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)	($2.30)	$1.79	($0.04)	$4.04
Discontinued operations (in dollars per share)	$0	($0.05)	($0.19)	$0.60
Diluted EPS (in dollars per share)	($2.30)	$1.74	($0.23)	$4.64

Investigations_and_Out_of_Peri5

Investigations and Out of Period Adjustments (Impact on Income from Continuing Operations) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013
Adjustments Decrease [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Receivable, net of allowance for doubtful accounts		($6)
Property and Equipment	-1	-1
Software, net of accumulated amortization	-2
Other assets	-3
Accrued payroll and related costs		-9
Accrued expenses and other current liabilities	-15	-18
Adjustments Increase [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Receivable, net of allowance for doubtful accounts	5
Prepaid expenses and other current assets		1
Outsourcing contract costs, net of accumulated amortization	2
Other assets		1
Deferred revenue and advance contract payments	$4	$22

Earnings_Loss_Per_Share_Detail

Earnings (Loss) Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Net income attributable to CSC common shareholders [Abstract]
From continuing operations	($314)	$276	$12	$586
From discontinued operations	0	-5	-29	91
Net (loss) income attributable to CSC common stockholders	($314)	$271	($17)	$677
Common share information [Abstract]
Weighted average common shares outstanding for basic EPS (in shares)	140,637,000	146,735,000	143,141,000	148,212,000
Dilutive effect of stock options and equity awards (in shares)	0	2,627,000	3,182,000	2,912,000
Shares for diluted earnings (loss) per share (in shares)	140,637,000	149,362,000	146,323,000	151,124,000
Basic EPS:
Basic EPS - Continuing operations (in dollars per share)	($2.23)	$1.88	$0.08	$3.96
Basic EPS - Discontinued Operations (in dollars per share)	$0	($0.03)	($0.20)	$0.61
Basic EPS (in dollars per share)	($2.23)	$1.85	($0.12)	$4.57
Diluted EPS:
Diluted EPS - Continuing operations (in dollars per share)	($2.23)	$1.84	$0.08	$3.88
Diluted EPS - Discontinued operations (in dollars per share)	$0	($0.03)	($0.20)	$0.60
Diluted EPS (in dollars per share)	($2.23)	$1.81	($0.12)	$4.48
Employee Stock Option [Member]
Diluted EPS:
Antidilutive securities excluded from computation	5,934,192
Restricted Stock Units (RSUs) [Member]
Diluted EPS:
Antidilutive securities excluded from computation	2,019,663
Antidilution Due To Exercise Price Exceeding Average Market Price [Member] | Employee Stock Option [Member]
Diluted EPS:
Antidilutive securities excluded from computation	1,218,655	4,765,896	1,074,109	4,843,346
Antidilution Due To Exercise Price Exceeding Average Market Price [Member] | Restricted Stock Units (RSUs) [Member]
Diluted EPS:
Antidilutive securities excluded from computation	1,666,952	535,373	101,058	139,548

Fair_Value_Details

Fair Value (Details) (USD $)	Jan. 02, 2015	Mar. 28, 2014
In Millions, unless otherwise specified
Assets:
Derivative instruments	$339
Fair Value, Measurements, Recurring [Member]
Assets:
Money market funds and money market deposit accounts	289	717
Time deposits	551	693
Derivative instruments	13	5
Total assets	853	1,415
Liabilities:
Derivative instruments	12	4
Total liabilities	12	4
Fair Value, Measurements, Recurring [Member] | Level 1
Assets:
Money market funds and money market deposit accounts	289	717
Time deposits	551	693
Derivative instruments	0	0
Total assets	840	1,410
Liabilities:
Derivative instruments	0	0
Total liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 2
Assets:
Money market funds and money market deposit accounts	0	0
Time deposits	0	0
Derivative instruments	13	5
Total assets	13	5
Liabilities:
Derivative instruments	12	4
Total liabilities	12	4
Fair Value, Measurements, Recurring [Member] | Level 3
Assets:
Money market funds and money market deposit accounts	0	0
Time deposits	0	0
Derivative instruments	0	0
Total assets	0	0
Liabilities:
Derivative instruments	0	0
Total liabilities	$0	$0

Fair_Value_Textual_Details

Fair Value (Textual) (Details) (USD $)	3 Months Ended		9 Months Ended
	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Mar. 28, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Transfers between Level 1 and Level 2	$0		$0
Impairment charges during the period	0	0	0	0
Long-term debt, excluding capital leases	2,170,000,000		2,170,000,000		2,207,000,000
Accounts receivable with customers involved in bankruptcy proceedings	16,000,000		16,000,000
Allowance for doubtful accounts with customers involved in bankruptcy proceedings	11,000,000		11,000,000
Other assets with customers in bankruptcy proceedings	1,000,000		1,000,000
Accounts Payable with Customers in Bankruptcy Proceedings	4,000,000		4,000,000
Foreign Exchange Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of counterparties to foreign currency derivative instruments	4		4
Number of Counterparties to Interest Rate Derivative Instruments	3		3
Foreign Exchange Contract [Member] | Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument, counterparty risk, less than	1,000,000		1,000,000
Interest Rate Swap | Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument, counterparty risk, less than	16,000,000		16,000,000
Reported Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, excluding capital leases	1,937,000,000		1,937,000,000		1,874,000,000
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, excluding capital leases	$2,076,000,000		$2,076,000,000		$2,057,000,000

Derivative_Instruments_Fair_Va

Derivative Instruments (Fair Values of Derivative Instruments) (Details) (USD $)	Jan. 02, 2015	Mar. 28, 2014
In Millions, unless otherwise specified
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	$13	$3
Derivative Liabilities	8	0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	2
Derivative Liabilities	4	4
Interest Rate [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	13	3
Interest Rate [Member] | Designated as Hedging Instrument [Member] | Other Long-term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Foreign Currency Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Foreign Currency Forward Contracts [Member] | Designated as Hedging Instrument [Member] | Accrued Expenses and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	8	0
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	2
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$4	$4

Derivative_Instruments_Narrati

Derivative Instruments (Narrative) (Details) (USD $)	Jan. 02, 2015	Mar. 28, 2014	Sep. 27, 2013
Derivative [Line Items]
Derivative instrument designed as cash flow hedge	$339,000,000
Cash Flow Hedge Loss to be Reclassified During Next 12 Months	-4,000,000
Offsetting Derivative Assets [Abstract]
Gross amounts not offset in the consolidated condensed balance sheets	0	0
Offsetting Derivative Liabilities [Abstract]
Gross amounts not offset in the consolidated condensed balance sheets	0	0
4.45% term notes, due September 2022
Derivative [Line Items]
Long-term Debt, Fair Value			275,000,000
Forward Contracts [Member]
Derivative [Line Items]
Notional amount of derivatives outstanding	512,000,000	816,000,000
Option Contracts [Member]
Derivative [Line Items]
Notional amount of derivatives outstanding	$0	$81,000,000

Derivative_Instruments_Gain_Lo

Derivative Instruments (Gain (Loss) on Derivatives) (Details) (Interest Rate Swap [Member], Designated as Hedging Instrument [Member], Fair Value Hedging [Member], USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss) on Hedged Item	($6)	$6	($10)	$0
Other Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Gain (Loss)	$6	($6)	$10	$0

Derivative_Instruments_Gain_Lo1

Derivative Instruments (Gain (Loss) Recognized in AOCI) (Details) (Foreign Exchange Contract [Member], Designated as Hedging Instrument [Member], Cash Flow Hedge [Member], USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) recognized in Accumulated OCI (effective portion) for the Quarter Ended	($2)	$0	($8)	$0
Gain (Loss) reclassified into cost of services from Accumulated OCI (effective portion) for the Quarter Ended	0	0	0	0
Gain (loss) recognized in Other Income (Expense) (ineffective portion) for the Quarter Ended	$0	$0	$0	$0

Derivative_Instruments_Nondesi

Derivative Instruments (Nondesignated Hedging) (Details) (Not Designated as Hedging Instrument [Member], USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	$3	$2	$2	($14)
Total return swaps [Member] | Cost of Services and Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	3	0	7	0
Foreign Currency Forward and Option Contracts [Member] | Other Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, pretax amounts affecting income	$0	$2	($5)	($14)

Debt_Longterm_Debt_Instruments

Debt (Long-term Debt Instruments (Details)

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

Jan. 02, 2015

Mar. 28, 2014

USD ($)

USD ($)

4.45% term notes, due September 2022

4.45% term notes, due September 2022

6.50% term notes, due March 2018

6.50% term notes, due March 2018

2.50% term notes, due September 2015

2.50% term notes, due September 2015

Note payable, due January 2016

Note payable, due January 2016

Note payable, due January 2016

Mandatorily redeemable preferred stock outstanding

Mandatorily redeemable preferred stock outstanding

Note payable of consolidated subsidiary

Note payable of consolidated subsidiary

Capitalized lease liabilities

Capitalized lease liabilities

Borrowings for assets acquired under long-term financing

Borrowings for assets acquired under long-term financing

Other borrowings

Other borrowings

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Debt Instrument [Line Items]

Long-term Debt

$2,724,000,000

$2,888,000,000

$445,000,000

$434,000,000

$917,000,000

$917,000,000

$350,000,000

$350,000,000

$389,000,000

£ 250,000,000

$413,000,000

$61,000,000

$61,000,000

$68,000,000

$68,000,000

$378,000,000

$511,000,000

$4,000,000

$36,000,000

Borrowings for assets acquired under long-term financing

112,000,000

98,000,000

Less: short term debt and current maturities of long term debt

554,000,000

681,000,000

Total long-term debt

$2,170,000,000

$2,207,000,000

Debt, stated interest rate

4.45%

6.50%

2.50%

Debt_Narrative_Details

Debt (Narrative) (Details)	Jan. 02, 2015	Mar. 28, 2014	Jan. 02, 2015	Jan. 02, 2015	Mar. 28, 2014	Jul. 04, 2014	Jan. 02, 2015	Jul. 04, 2014	Jan. 02, 2015	Mar. 28, 2014
	USD ($)	USD ($)	Note payable, due January 2016	Note payable, due January 2016	Note payable, due January 2016	CSC Asset Funding I LLC [Member]	CSC Asset Funding I LLC [Member]	CSC Asset Funding I LLC [Member]	Line of Credit	Line of Credit
			USD ($)	GBP (£)	USD ($)	Line of Credit	Line of Credit	Term Notes	USD ($)	USD ($)
						USD ($)	USD ($)
Debt Instrument [Line Items]
Credit facility borrowing capacity						$250,000,000			$2,500,000,000
Long-term Debt	2,724,000,000	2,888,000,000	389,000,000	250,000,000	413,000,000
Debt Instrument, Term						18 months		60 months
Borrowings against line of credit							$0		$0	$0

Pension_and_Other_PostRetireme2

Pension and Other Post-Retirement Benefit Plans (Details) (USD $)	3 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended
	Jul. 04, 2014	Jul. 19, 2013	Jan. 02, 2015	Jan. 02, 2015	Dec. 31, 2014	Dec. 27, 2013	Dec. 27, 2013	Oct. 06, 2014	Jul. 31, 2014	Apr. 30, 2014	Mar. 28, 2014	Dec. 20, 2013	Mar. 29, 2013
												plan
Components of net periodic benefit cost [Abstract]
Benefit obligation discount rate										4.14%	4.23%
Curtailment loss	($2,000,000)								$3,000,000
Funded status of plan								74.00%
Benefit Obligation, period decrease	1,000,000
ATD [Member]
Components of net periodic benefit cost [Abstract]
Benefit Obligation, period decrease		8,000,000
Decrease from remeasurement		28,000,000
Reduction in PBO due to plan amendment		-28,000,000
Pension Plans, Defined Benefit
Components of net periodic benefit cost [Abstract]
Contributions By Employer			14,000,000	60,000,000
Estimated additional employers contributions to be made remaining of year			18,000,000	18,000,000
US pension plans [Member]
Components of net periodic benefit cost [Abstract]
Service cost			1,000,000	3,000,000		1,000,000	4,000,000
Interest cost			38,000,000	114,000,000		37,000,000	112,000,000
Expected return on assets			-61,000,000	-182,000,000	-0.076	-52,000,000	-162,000,000
Amortization of transition obligation			0	0		0	0
Amortization of prior service (credit) cost			0	0		0	2,000,000
Recognition of actuarial losses (gains)			374,000,000	375,000,000		0	0
Contractual termination benefits			0	0		0	0
Settlement loss			56,000,000	58,000,000		0	-28,000,000
Net periodic pension cost			408,000,000	368,000,000		-14,000,000	-72,000,000
Loss on plan amendments			-430,000,000
Actuarial (gains) losses			374,000,000
Benefit obligation discount rate					4.13%						4.58%
Curtailment loss					-474,000,000
Funded status of plan					87.00%
Economic benefit of lump sum payments			98,000,000
Reduction in PBO due to plan amendment					-583,000,000
Non-US pension plans [Member]
Components of net periodic benefit cost [Abstract]
Service cost			5,000,000	17,000,000		6,000,000	19,000,000
Interest cost			29,000,000	90,000,000		32,000,000	94,000,000
Expected return on assets			-44,000,000	-138,000,000		-42,000,000	-121,000,000
Amortization of transition obligation			0	-1,000,000		-1,000,000	-1,000,000
Amortization of prior service (credit) cost			-2,000,000	-8,000,000		0	-2,000,000
Recognition of actuarial losses (gains)			26,000,000	26,000,000		-114,000,000	-114,000,000
Contractual termination benefits			-1,000,000	-8,000,000		0	3,000,000
Settlement loss			3,000,000	3,000,000		0	0
Net periodic pension cost			16,000,000	-17,000,000		-117,000,000	-120,000,000
Postretirement Health Coverage [Member]
Components of net periodic benefit cost [Abstract]
Expected return on assets								-0.075
Actuarial (gains) losses								1,000,000
Benefit obligation discount rate								4.01%			4.32%
Reduction in PBO due to plan amendment								-99,000,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of net periodic benefit cost [Abstract]
Service cost			0	2,000,000		1,000,000	3,000,000
Interest cost			2,000,000	6,000,000		2,000,000	7,000,000
Expected return on assets			-2,000,000	-5,000,000		-2,000,000	-4,000,000
Amortization of prior service (credit) cost			-7,000,000	-8,000,000		0	-2,000,000
Recognition of actuarial losses (gains)			1,000,000	1,000,000		0	0
Settlement loss				0			-8,000,000
Net periodic pension cost			-6,000,000	-4,000,000		1,000,000	-4,000,000
Contributions by Employer			0	3,000,000
SWITZERLAND | Non-US pension plans [Member]
Components of net periodic benefit cost [Abstract]
Expected return on assets					-0.036
Settlement loss			3,000,000
Loss on plan amendments			-29,000,000
Actuarial (gains) losses			26,000,000
Benefit obligation discount rate			1.20%	1.20%							2.10%
Funded status of plan			78.00%	78.00%
Reduction in PBO due to plan amendment					38,000,000
UNITED KINGDOM | Non-US pension plans [Member]
Components of net periodic benefit cost [Abstract]
Actuarial (gains) losses			-114,000,000
Benefit obligation discount rate												4.65%	4.31%
Reduction in PBO due to plan amendment						$443,000,000	$443,000,000
Number of plans remeasured												2

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Income Taxes [Abstract]
Effective Income Tax Rate, Continuing Operations	25.10%	21.50%	43.90%	27.30%
Tax benefit (expense) from losses in pension plan	($462)	$114	($462)	$114
Non-deductible penalty related to SEC settlement	190		190
Tax expense (benefit) from mark-to-market adjustments (as a percent)	-2.90%	-10.00%	16.70%	-4.30%
Tax benefit from reversal of uncertain state tax positions	11		15
Tax benefit from reversal of uncertain state tax position (as a percent)	2.70%		36.50%
Tax benefit from settlement of foreign audits		6		6
Tax benefit from settlement of foreign audits, percent		1.70%		0.70%
Valuation Allowance [Line Items]
Uncertain state tax positions for which statute of limitations has expired			16
Possible reduction in liability for uncertain tax positions over next twelve months			15
UK tax authority | Foreign tax authority
Valuation Allowance [Line Items]
Valuation allowance related to deferred tax assets	$360		$360

Stock_Incentive_Plans_Details

Stock Incentive Plans (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
In Millions, except Share data, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Mar. 28, 2014
			plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$19	$20	$54	$53
Total share based compensation, net of tax	12	13	35	34
Number of incentive plans within the employee or nonemployee plan			2
Number of common shares available for grant at period end	15,655,847		15,655,847
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Aggregate intrinsic value exercised			62	27
Aggregate disclosures [Abstract]
Cash received from stock awards exercised during the period			151	112
Total unrecognized compensation expense related to unvested awards, net of expected forfeitures	34		34
Weighted average period over which cost is expected to be recognized (in years)			1 year 10 months 6 days
Cost of services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	5	7	14	20
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	14	13	40	33
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			1
Issue price of award (in dollars per share)	$0		$0
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in Period, Weighted Average Price Per Share			$18.32	$16.35
Risk Free Interest Rate			2.07%	1.97%
Expected Volatility Rate			33.00%	34.00%
Expected Term (in years)			6 years 2 months 19 days	6 years 2 months 23 days
Expected Dividend Rate			1.50%	1.52%
Excess tax benefit related to stock incentive plans			15	5
Vesting period - minimum (in years)			3 years
Exercise period (in years)			10 years
Number of Option Shares
Outstanding beginning of period (in shares)			9,829,611
Granted (in shares)			1,331,361
Exercised (in shares)			-3,507,145
Expired (in shares)			-54,969
Outstanding end of period (in shares)	6,790,163		6,790,163		9,829,611
Vested and expected to vest [Abstract]
Vested and expected to vest in the future as of period end (in shares)	6,622,324		6,622,324
Exercisable as of period end (in shares)	4,134,127		4,134,127
Weighted Average Exercise Price
Weighted average exercise price -beginning of period (in dollars per share)			$43.30
Weighted average exercise price - granted (in dollars per share)			$60.88
Weighted average exercise price - exercised (in dollars per share)			$44.81
Weighted average exercise price - cancelled/forfeited (in dollars per share)			$41.39
Weighted average exercise price - expired (in dollars per share)			$45.31
Weighted average exercise price - end of period (in dollars per share)	$46.18		$46.18		$43.30
Weighted average exercise price vested and expected to vest as of period end (in dollars per share)	$45.92		$45.92
Weighted average exercise price exercisable as of period end (in dollars per share)	$44.48		$44.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual life (in years)			5 years 11 months 1 day		5 years 8 months 23 days
Weighted average remaining contractual life vested and expected to vest in the future as of period end (in years)			5 years 10 months 2 days
Weighted average remaining contractual life exercisable as of period end (in years)			4 years 1 month 24 days
Aggregate intrinsic value	116		116		167
Aggregate intrinsic value exercised			62
Aggregate intrinsic value vested and expected to vest in the future as of period end	115		115
Aggregate intrinsic value exercisable as of period end	78		78
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period			808,695
Stock Options and RSU's [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax Benefit Realized from Exercise of Options			41	16
Other stock based incentives [Member]
Equity instruments other than options nonvested [Roll Forward]
Equity instruments other than options nonvested - beginning balance (in shares)			3,187,741
Equity instruments other than options nonvested - granted (in shares)			982,278
Equity instruments other than options nonvested - released/redeemed (in shares)			-771,119
Equity instruments other than options nonvested - canceled/forfeited (in shares)			-604,159
Equity instruments other than options nonvested - ending balance (in shares)	2,794,741		2,794,741
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average fair value other than options - beginning balance (in dollars per share)			$41.34
Weighted average fair value other than options - granted (in dollars per share)			$60.79
Weighted average fair value other than options - released/redeemed (in dollars per share)			$41.76
Weighted average fair value other than options - canceled/forfeited (in dollars per share)			$41.51
Weighted average fair value other than options - ending balance (in dollars per share)	$48.02		$48.02
Restricted stock awards and other stock based incentives [Member]
Aggregate disclosures [Abstract]
Total unrecognized compensation expense related to unvested awards, net of expected forfeitures	98		98
Weighted average period over which cost is expected to be recognized (in years)			2 years
Nonemployee director incentives [Member]
Equity instruments other than options nonvested [Roll Forward]
Equity instruments other than options nonvested - beginning balance (in shares)			184,146
Equity instruments other than options nonvested - granted (in shares)			22,100
Equity instruments other than options nonvested - released/redeemed (in shares)			-62,260
Equity instruments other than options nonvested - canceled/forfeited (in shares)			0
Equity instruments other than options nonvested - ending balance (in shares)	143,986		143,986
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Weighted average fair value other than options - beginning balance (in dollars per share)			$42.07
Weighted average fair value other than options - granted (in dollars per share)			$59.63
Weighted average fair value other than options - released/redeemed (in dollars per share)			$44.10
Weighted average fair value other than options - canceled/forfeited (in dollars per share)			$0
Weighted average fair value other than options - ending balance (in dollars per share)	$43.88		$43.88
SMI Employees | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			10
Nonemployee director incentives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of incentive plans within the employee or nonemployee plan			2
Number of common shares available for grant at period end	175,300		175,300
Fiscal 2015 Option | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			11
Employee Severance [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			$20

Stockholders_Equity_Stock_Repu

Stockholder's Equity (Stock Repurchase Program) (Textual) (Details) (USD $)	9 Months Ended		3 Months Ended
	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Oct. 03, 2014	Jul. 04, 2014	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchased during period	$512,000,000	$354,000,000
Payments for repurchase of common stock	518,000,000	376,000,000
Remaining shares authorized for repurchase	1,100,000,000		1,100,000,000
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized Amount in share repurchases						1,500,000,000	1,000,000,000
Shares repurchased during the period			1,290,481
Stock repurchased during period			75,000,000
ASR settlement	50,000,000		50,000,000
ASR settlement, shares			31,830
ASR settlement (in USD per share)			$58.12
Common Stock | Open Market Purchases
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased during the period	7,205,050	7,279,117	150,000	2,405,895
Stock repurchased during period	437,000,000	354,000,000	9,000,000	125,000,000
Stock repurchased during period (in USD per share)	$60.60	$48.58	$59.09	$51.96
Common Stock | ASR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased during the period					1,258,651
Stock repurchased during period					125,000,000
Accrued Liabilities | December 2010 Share Repurchase Program | Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments for repurchase of common stock						$6,000,000

Stockholders_Equity_Accumulate

Stockholder's Equity (Accumulated Other Comprehensive Loss) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Before Tax Income (Loss) [Abstract]
Gain (loss) on foreign currency forward and option contracts, Before Tax Amount			($8)
Total other comprehensive income (loss), Before Tax Amount	-4	251	-112	169
Tax Expense [Abstract]
Gain (loss) on foreign currency forward and option contracts, Tax Expense			0
Total other comprehensive income (loss), Tax (Expense)/Benefit	-36	0	-37	-2
Net of Tax Income (Loss) [Abstract]
Foreign currency translation adjustments, Net of Tax Amount			-139	168
Gain (loss) on foreign currency forward and option contracts, Net of Tax Amount			-8
Total pension and other post-retirement benefit plans, Net of Tax Amount	-52	-260	-48	-260
Other comprehensive (loss) income, net of taxes	-40	251	-149	167
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period			279	108
Current-period other comprehensive (loss) income, net of taxes			-139	168
Amounts reclassified from accumulated other comprehensive loss, net of taxes			1	-10
Balance at end of period	141	266	141	266
Accumulated Translation Adjustment [Member]
Before Tax Income (Loss) [Abstract]
Foreign currency translation adjustments, Before Tax Amount	-90	-9	-188	-91
Tax Expense [Abstract]
Foreign currency translation adjustments, Tax (Expense)/Benefit	0	0	-1	-2
Net of Tax Income (Loss) [Abstract]
Foreign currency translation adjustments, Net of Tax Amount	-90	-9	-189	-93
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Current-period other comprehensive (loss) income, net of taxes	-90	-9	-189	-93
Cash Flow Hedge [Member]
Before Tax Income (Loss) [Abstract]
Gain (loss) on foreign currency forward and option contracts, Before Tax Amount	-2
Tax Expense [Abstract]
Gain (loss) on foreign currency forward and option contracts, Tax Expense	0
Net of Tax Income (Loss) [Abstract]
Foreign currency translation adjustments, Net of Tax Amount			-8
Gain (loss) on foreign currency forward and option contracts, Net of Tax Amount	-2
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period			0
Current-period other comprehensive (loss) income, net of taxes			-8
Amounts reclassified from accumulated other comprehensive loss, net of taxes			0
Balance at end of period	-8		-8
Accumulated Defined Benefit Plans Adjustment [Member]
Before Tax Income (Loss) [Abstract]
Net actuarial gain (loss), Before Tax Amount				2
Prior service cost (credit), Before Tax Amount	97	260	97	260
Amortization of transition obligation, Before Tax Amount		1	1	1
Amortization of prior service (credit) / cost, Before Tax Amount	-9	-1	-14	-2
Foreign currency exchange rate changes, Before Tax Amount				-1
Tax Expense [Abstract]
Net actuarial gain (loss), Tax (Expense)/Benefit				0
Prior service cost (credit), Tax Expense	-39	0	-39	0
Amortization of transition obligation, Tax (Expense)/Benefit		0	0	0
Amortization of prior service (credit) / cost, Tax (Expense)/Benefit	3	0	3	0
Foreign currency exchange rate changes, Tax (Expense)/Benefit				0
Net of Tax Income (Loss) [Abstract]
Net actuarial gain (loss), Net of Tax Amount				2
Prior service cost (credit), Net of Tax Amount	58	260	58	260
Amortization of transition obligation, Net of Tax Amount		1	1	1
Amortization of prior service (credit) / cost, Net of Tax Amount	-6	-1	-11	-2
Foreign currency exchange rate changes, Net of Tax Amount				-1
Other Pension and Other Post-retirement Benefit Plans [Member]
Before Tax Income (Loss) [Abstract]
Total pension and other post-retirement benefit plans, Before Tax Amount	88	260	84	260
Tax Expense [Abstract]
Total pension and other post-retirement benefit plans, Tax (Expense)/Benefit	-36	0	-36	0
Net of Tax Income (Loss) [Abstract]
Foreign currency translation adjustments, Net of Tax Amount			58	261
Total pension and other post-retirement benefit plans, Net of Tax Amount	52	260	48	260
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period			285	34
Current-period other comprehensive (loss) income, net of taxes			58	261
Amounts reclassified from accumulated other comprehensive loss, net of taxes			1	-10
Balance at end of period	344	285	344	285
Foreign Currency Translation Adjustment [Member]
Net of Tax Income (Loss) [Abstract]
Foreign currency translation adjustments, Net of Tax Amount			-189	-93
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period			-6	74
Current-period other comprehensive (loss) income, net of taxes			-189	-93
Amounts reclassified from accumulated other comprehensive loss, net of taxes			0	0
Balance at end of period	($195)	($19)	($195)	($19)

Cash_Flows_Details

Cash Flows (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013
Cash payments for interest and income taxes [Abstract]
Interest	$88	$87
Taxes on income, net of refunds	122	95
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital expenditures in accounts payable and accrued expenses	42	48
Capital expenditures through capital lease obligations	10	96
Assets acquired under long-term financing	74	5
Common share dividends declared, but not yet paid (non-cash)	$32	$29

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Segment Reporting Information [Line Items]
Revenues	$2,947	$3,228	$9,264	$9,669
Operating income	332	338	985	1,031
Depreciation and amortization	238	251	762	753
GBS [Member]
Segment Reporting Information [Line Items]
Revenues	965	1,093	3,056	3,169
Operating income	128	140	366	373
Depreciation and amortization	37	34	116	112
GBS [Member] | As Reported
Segment Reporting Information [Line Items]
Revenues	965	1,093
Operating income	128	140
Depreciation and amortization	37	34
GBS [Member] | Increase/ (Decrease)
Segment Reporting Information [Line Items]
Revenues	-1	-6	3	24
Operating income	-4	-7	5	22
Depreciation and amortization	0	0	-1	1
GBS [Member] | As Adjusted
Segment Reporting Information [Line Items]
Revenues	964	1,087	3,059	3,193
Operating income	124	133	371	395
Depreciation and amortization	37	34	115	113
GIS [Member]
Segment Reporting Information [Line Items]
Revenues	984	1,145	3,151	3,405
Operating income	72	91	211	290
Depreciation and amortization	163	177	529	520
GIS [Member] | As Reported
Segment Reporting Information [Line Items]
Revenues	984	1,145	3,151	3,405
Operating income	72	91	211	290
Depreciation and amortization	163	177	529	520
GIS [Member] | Increase/ (Decrease)
Segment Reporting Information [Line Items]
Revenues	0	-2	2	-2
Operating income	0	-6	3	-5
Depreciation and amortization	0	0	0	-1
GIS [Member] | As Adjusted
Segment Reporting Information [Line Items]
Revenues	984	1,143	3,153	3,403
Operating income	72	85	214	285
Depreciation and amortization	163	177	529	519
NPS [Member]
Segment Reporting Information [Line Items]
Revenues	998	990	3,057	3,095
Operating income	145	122	456	412
Depreciation and amortization	33	36	104	110
NPS [Member] | As Reported
Segment Reporting Information [Line Items]
Revenues	998	990	3,057	3,095
Operating income	145	122	456	412
Depreciation and amortization	33	36	104	110
NPS [Member] | Increase/ (Decrease)
Segment Reporting Information [Line Items]
Revenues	0	2	5	-5
Operating income	0	1	-5	0
Depreciation and amortization	0	0	0	0
NPS [Member] | As Adjusted
Segment Reporting Information [Line Items]
Revenues	998	992	3,062	3,090
Operating income	145	123	451	412
Depreciation and amortization	33	36	104	110
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating income	-13	-15	-48	-44
Depreciation and amortization	5	4	13	11
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating income	0	0	0	0
Depreciation and amortization	$0	$0	$0	$0

Segment_Information_Reconcilia

Segment Information (Reconciliation of Consolidated Operating Income to Income Before Taxes) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	$332	$338	$985	$1,031
Corporate G&A	-59	-65	-182	-197
Pension & OPEB actuarial & settlement (losses) gains	-462	114	-463	114
SEC settlement related charges	-195	0	-195	0
Interest expense	-37	-38	-112	-112
Interest income	4	4	14	11
Other income (expense), net	-1	5	-6	-16
(Loss) income from continuing operations, before taxes	-418	358	41	831
Change in accounting policy, increase on operating income	$208	$22	$251	$68

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Mar. 28, 2014
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	$4,431
Accumulated impairment losses	-2,764
Balance as of March 28, 2014, net	1,669	1,667
Additions	31
Deductions	2
Foreign currency translation	-27
Goodwill Gross	4,433
Accumulated impairment losses	-2,764
Balance as of January 2, 2015, net	1,669	1,667
GBS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	1,370
Accumulated impairment losses	-690
Balance as of March 28, 2014, net	651	680
Additions	0
Deductions	2
Foreign currency translation	-27
Goodwill Gross	1,341
Accumulated impairment losses	-690
Balance as of January 2, 2015, net	651	680
GIS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	2,273
Accumulated impairment losses	-2,074
Balance as of March 28, 2014, net	199	199
Additions	0
Deductions	0
Foreign currency translation	0
Goodwill Gross	2,273
Accumulated impairment losses	-2,074
Balance as of January 2, 2015, net	199	199
NPS [Member]
Changes in the carrying amount of goodwill by segment [Roll Forward]
Goodwill Gross	788
Accumulated impairment losses	0
Balance as of March 28, 2014, net	819	788
Additions	31
Deductions	0
Foreign currency translation	0
Goodwill Gross	819
Accumulated impairment losses	0
Balance as of January 2, 2015, net	$819	$788

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015	Dec. 27, 2013	Mar. 28, 2014
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	$4,268		$4,268		$4,383
Accumulated Amortization	3,007		3,007		3,033
Net Carrying Value	1,261		1,261		1,350
Amortization expense	103	97	325	289
Outsourcing Contract Costs Amortization Expense	8	9	25	26
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Remainder of 2015	112		112
2016	325		325
2017	256		256
2018	205		205
2019	176		176
GIS [Member]
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Gain on sale of intangible asset			43
Outsourcing contract costs
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	1,333		1,333		1,465
Accumulated Amortization	1,003		1,003		1,038
Net Carrying Value	330		330		427
Software
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	2,457		2,457		2,330
Accumulated Amortization	1,681		1,681		1,680
Net Carrying Value	776		776		650
Software | Internal-use software
Finite-Lived Intangible Assets, Net [Abstract]
Amortization expense	53	44	163	134
Customer and other intangible assets
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	478		478		588
Accumulated Amortization	323		323		315
Net Carrying Value	155		155		273
Amortization expense	2	2	7	8
Network-related Intangible Assets | GIS [Member]
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Proceeds from sale of intangible assets			17
Receivable from sale of intangible assets	$26		$26

Restructuring_Costs_Details

Restructuring Costs (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Jan. 02, 2015	Dec. 27, 2013	Jan. 02, 2015		Dec. 27, 2013
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed in fiscal 2015	$12	$11	$15		$33
Restructuring liability	32		32
Cost of Sales [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed in fiscal 2015	8	4	9		28
Selling, General and Administrative Expenses [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed in fiscal 2015	4	7	6		5
GBS [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed in fiscal 2015	10	7	12		25
GIS [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed in fiscal 2015	1	4	2		10
NPS [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed in fiscal 2015	0	0	0		0
Corporate [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed in fiscal 2015	1	0	1		-2
Accrued expenses [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring reserve, current	31		31
Other Long Term Liabilities [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring reserve, noncurrent	1		1
Fiscal 2015 Plan [Member] | Workforce Reductions [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability			0
Costs expensed in fiscal 2015			25
Less: costs not affecting restructuring liability			0	[1]
Cash paid			-11
Other			-1
Restructuring liability	13		13
Fiscal 2013 Plan [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability			83
Costs expensed in fiscal 2015			-10
Less: costs not affecting restructuring liability			7
Cash paid			-60
Other			-2	[2]
Restructuring liability	18		18
Fiscal 2013 Plan [Member] | Workforce Reductions [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability			70
Costs expensed in fiscal 2015			-12
Less: costs not affecting restructuring liability			7
Cash paid			-53
Other			-2	[2]
Restructuring liability	10		10
Fiscal 2013 Plan [Member] | Facilities costs [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability			13
Costs expensed in fiscal 2015			2
Less: costs not affecting restructuring liability			0
Cash paid			-7
Other			0	[2]
Restructuring liability	8		8
Fiscal 2012 Plan [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability			2
Costs expensed in fiscal 2015			0
Cash paid			-2
Other			1	[2]
Restructuring liability	1		1
Fiscal 2012 Plan [Member] | Facilities costs [Member]
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability			2
Costs expensed in fiscal 2015			0
Cash paid			-2
Other			1	[2]
Restructuring liability	$1		$1
[1]	Charges primarily consist of pension benefit augmentations and are recorded as a pension liability.
[2]	Foreign currency translation adjustments.

Contract_with_the_UK_National_1

Contract with the U.K. National Health Service (Details)

0 Months Ended

3 Months Ended

In Millions, unless otherwise specified

Mar. 28, 2013

Mar. 28, 2013

Aug. 31, 2012

Aug. 31, 2012

Dec. 30, 2011

Jan. 02, 2015

Oct. 04, 2013

Oct. 04, 2013

Oct. 04, 2013

Oct. 04, 2013

Oct. 04, 2013

Oct. 04, 2013

USD ($)

GBP (£)

USD ($)

GBP (£)

USD ($)

USD ($)

USD ($)

GBP (£)

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

USD ($)

GBP (£)

USD ($)

GBP (£)

Contracts Receivable [Abstract]

U.K. National Health (NHS) current contract

$75

£ 47.5

Contract Modification, Aggregate Voluntary Decommision Limit

31

19.6

Contract Modification, Voluntary Decommission Limit, Certain Products

0.3

0.2

6.9

4.4

Change in accounting estimate, reduction in operating income

1,500

Contract modification, total consideration to be received

120

78

Contract modification, amount held in escrow

15

10

Contract Modification, Deferred Costs

18

Proceed to settle disputed amounts, net of VAT

15

10

105

68

Contract Modification, Deferred Revenues

$166

Commitments_and_Contingencies_1

Commitments and Contingencies (Commitments) (Details) (USD $)	Jan. 02, 2015
In Millions, unless otherwise specified
Guarantor Obligations [Line Items]
Fiscal 2015	$35
Fiscal 2016	83
Fiscal 2017 and thereafter	40
Total	158
Surety Bonds
Guarantor Obligations [Line Items]
Fiscal 2015	1
Fiscal 2016	20
Fiscal 2017 and thereafter	0
Total	21
Letters of credit
Guarantor Obligations [Line Items]
Fiscal 2015	9
Fiscal 2016	41
Fiscal 2017 and thereafter	28
Total	78
Standby letters of credit
Guarantor Obligations [Line Items]
Guarantee obligations maximum exposure	59
Fiscal 2015	25
Fiscal 2016	22
Fiscal 2017 and thereafter	12
Total	$59

Commitments_and_Contingencies_2

Commitments and Contingencies (Contingencies) (Details) (USD $)

3 Months Ended

9 Months Ended

0 Months Ended

12 Months Ended

36 Months Ended

Jan. 02, 2015

Dec. 27, 2013

Dec. 30, 2011

Jan. 02, 2015

Dec. 27, 2013

Aug. 22, 2014

Mar. 30, 2012

Apr. 01, 2011

Apr. 02, 2010

Apr. 01, 2011

Feb. 14, 2014

Sep. 27, 2013

Loss Contingencies [Line Items]

Change in operating loss (income)

$1,500,000,000

Settlement charge

195,000,000

0

195,000,000

0

MERP Claim Number 1

Loss Contingencies [Line Items]

Contract claim

34,000,000

61,000,000

MERP Claim Number 2A | Pending Litigation

Loss Contingencies [Line Items]

Second contract claim

77,000,000

MERP Claim Number 2B | Pending Litigation

Loss Contingencies [Line Items]

Second contract claim

65,000,000

MERP Claim Number 2C | Pending Litigation

Loss Contingencies [Line Items]

Second contract claim

65,000,000

MERP Claim Number 2D | Pending Litigation

Loss Contingencies [Line Items]

Second contract claim

3,000,000

Contracts Accounted for under Percentage of Completion, U.S. Claims [Member] | NHS contract [Member]

Loss Contingencies [Line Items]

Change in operating loss (income)

1,160,000,000

130,000,000

Change in net income

-3,900,000,000

3,690,000,000

50,000,000

Penalty related to SEC settlement

190,000,000

Settlement charge

195,000,000

Miscellaneous errors [Member] | Restatement Adjustment [Member]

Loss Contingencies [Line Items]

Goodwill impairment

2,510,000,000

Miscellaneous errors [Member] | As previously reported [Member]

Loss Contingencies [Line Items]

Goodwill impairment

$2,750,000,000