Acquisitions and Divestitures (Divestiture) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended							12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended			3 Months Ended			3 Months Ended		12 Months Ended
	Jun. 28, 2013 Businesses	Jun. 29, 2012	Mar. 29, 2013 Businesses	Jun. 28, 2013 Prepaid and other current assets [Member]	Jun. 28, 2013 Noncurrent Assets [Member]	Jun. 28, 2013 Goodwill [Member]	Jun. 28, 2013 Other Long-term Assets [Member]	Jun. 28, 2013 Accrued expenses and other liabilities [Member]	Jun. 28, 2013 Other Long Term Liabilities [Member]	Mar. 29, 2013 GBS [Member] Businesses	May 21, 2013 Flood-Insurance-Related Business Process Outsourcing Practice [Member]	Jun. 29, 2012 Flood-Insurance-Related Business Process Outsourcing Practice [Member]	Mar. 29, 2013 CSC Credit Services [Member] GBS [Member]	Mar. 29, 2013 Enterprise System Integration Business [Member] GBS [Member]	Mar. 29, 2013 CSC Italia [Member] GBS [Member]	Jun. 28, 2013 CSC Credit Services, Enterprise System Integration Businessa and CSC Italia [Member] GBS [Member]	Dec. 30, 2011 CSC Credit Services, Enterprise System Integration Businessa and CSC Italia [Member] GBS [Member]	Mar. 29, 2013 CSC Credit Services, Enterprise System Integration Businessa and CSC Italia [Member] GBS [Member]	Jun. 28, 2013 CSC Credit Services and CSC Italia [Member] GBS [Member]	Jun. 28, 2013 Paxus [Member]	Mar. 29, 2013 Paxus [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Held-for-sale, Current				$ 144	$ 62	$ 43	$ 19	$ 69
Discontinued Operation, Tax Effect of Discontinued Operation												4
Discontinued Operations, Proceeds from Divestiture of Business, Working Capital Adjustment														14
Proceeds from Divestiture of Businesses, Net of Cash Divested											25
Cash proceeds from divestiture of businesses	56	2									43		1,003	90							63
Accounts Receivable, Net, Current																					16
Transaction costs paid															35
Cash and cash equivalents on divested entity's books															8
Discontinued Operations, Proceeds from Divestiture of Business, Purchase Price Adjustment															5
Number of Divestitures in Period	2		3							3
Pre-tax gain on sale of business		2	769													25	0
Gain on disposition, net of taxes			417													12	0
Transaction costs																			11		3
Disposal group current assets											9							129
Disposal group long-lived assets											14							11
Deductions											12							241
Consideration Of Divested Business																				10	79
Noncash or Part Noncash Divestiture, Amount of Consideration Received																				6
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal																					38
Disposal Group, Including Discontinued Operation, Other Noncurrent Assets											2
Disposal group liabilities											1							85
Revenue																173	324
Income from discontinued operations, before taxes																10	39
Tax expense																4	14
Net income from discontinued operations																6	25
Tax expense																13	0
Income from discontinued operations, net of taxes	18	25														18	25
Assets Held-for-sale, at Carrying Value				41	2
Liabilities of Assets Held-for-sale								$ 5	$ 37