(Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended			3 Months Ended	6 Months Ended	0 Months Ended			0 Months Ended		3 Months Ended
	Oct. 03, 2014	Jul. 04, 2014	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013	Mar. 28, 2014	Sep. 27, 2013 Impact of change in accounting methods	Sep. 27, 2013 Impact of change in accounting methods	Jul. 31, 2014 European Healthcare European GBS - IS&S	Oct. 03, 2014 European Healthcare European GBS - IS&S	Jul. 31, 2014 European Healthcare European GBS - IS&S	Jul. 19, 2013 NPS Applied Technology Division	May 21, 2013 Flood-Insurance-Related Business Process Outsourcing Practice	Mar. 28, 2014 Flood-Insurance-Related Business Process Outsourcing Practice
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from divestiture of businesses				$ 13	$ (232)				$ (3)			$ (178)	$ (43)
Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, before Income Tax									22					(1)
Disposal group current assets										54
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents										21
Goodwill	1,684			1,684		1,667					0
Disposal group other noncurrent assets										25
Liabilities assumed										33
Noncurrent liabilities of disposal group										23
Proceeds from divestiture of business, working capital adjustment		1										6	4	3
Net of cash divested												77	25
Proceeds from divestiture of business, purchase price adjustment		2
Income from discontinued operations, net of taxes							17	19
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Revenue	3		41	10	220
(Loss) income from discontinued operations, before taxes	(2)		5	(11)	12
Tax expense	0		2	0	5
Net (loss) income from discontinued operations	(2)		3	(11)	7
(Loss) gain on disposition, before taxes	(22)		79	(21)	104
Tax (benefit) expense	(3)		2	(3)	15
(Loss) gain on disposition, net of taxes	(19)		77	(18)	89
Income from discontinued operations, net of taxes	$ (21)		$ 80	$ (29)	$ 96