Restructuring Costs (Details) - USD ($)		3 Months Ended			9 Months Ended
		Jan. 01, 2016	Apr. 03, 2015	Jan. 02, 2015	Jan. 01, 2016	Jan. 02, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 7,000,000		$ 12,000,000	$ 12,000,000	$ 15,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed (reversed)		7,000,000		12,000,000	12,000,000	15,000,000
Restructuring liability, ending balance		131,000,000			131,000,000
Cost of services
Restructuring Cost and Reserve [Line Items]
Restructuring costs		11,000,000		8,000,000	9,000,000	9,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed (reversed)		11,000,000		8,000,000	9,000,000	9,000,000
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Restructuring costs		(4,000,000)		4,000,000	3,000,000	6,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed (reversed)		(4,000,000)		4,000,000	3,000,000	6,000,000
Accrued expenses
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring reserve, current		125,000,000			125,000,000
Other Long Term Liabilities
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring reserve, noncurrent		6,000,000			6,000,000
Fiscal 2016 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					45,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					0
Costs expensed (reversed)					45,000,000
Cash paid					(6,000,000)
Restructuring liability, ending balance		39,000,000	$ 0		39,000,000
Fiscal 2016 Plan | Workforce reductions
Restructuring Cost and Reserve [Line Items]
Restructuring costs					12,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					0
Costs expensed (reversed)					12,000,000
Cash paid					0
Restructuring liability, ending balance		12,000,000	0		12,000,000
Fiscal 2016 Plan | Facilities costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs					33,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					0
Costs expensed (reversed)					33,000,000
Cash paid					(6,000,000)
Restructuring liability, ending balance		27,000,000	0		27,000,000
Fiscal 2015 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs					(33,000,000)
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					231,000,000
Costs expensed (reversed)					(33,000,000)
Cash paid					(105,000,000)
Other					(3,000,000)
Restructuring liability, ending balance		90,000,000	231,000,000		90,000,000
Fiscal 2015 Plan | Workforce reductions
Restructuring Cost and Reserve [Line Items]
Restructuring costs					(33,000,000)
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					230,000,000
Costs expensed (reversed)					(33,000,000)
Cash paid					(105,000,000)
Other					(3,000,000)
Restructuring liability, ending balance		89,000,000	230,000,000		89,000,000
Fiscal 2015 Plan | Facilities costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs					0
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					1,000,000
Costs expensed (reversed)					0
Cash paid					0
Other					0
Restructuring liability, ending balance		1,000,000	1,000,000		1,000,000
Fiscal 2015 Plan | Special restructuring
Composition of Workforce Restructuring Liability [Roll Forward]
Cash paid	[1]		(99,000,000)
Fiscal 2013 Plan
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					8,000,000
Cash paid					(6,000,000)
Restructuring liability, ending balance		2,000,000	8,000,000		2,000,000
Fiscal 2013 Plan | Workforce reductions
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					3,000,000
Cash paid					(3,000,000)
Restructuring liability, ending balance		0	3,000,000		0
Fiscal 2013 Plan | Facilities costs
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					5,000,000
Cash paid					(3,000,000)
Restructuring liability, ending balance		2,000,000	5,000,000		2,000,000
Fiscal 2012 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring costs		0			0
Composition of Workforce Restructuring Liability [Roll Forward]
Restructuring liability, beginning balance					1,000,000
Costs expensed (reversed)		0			0
Restructuring liability, ending balance		0	$ 1,000,000		0
Operating Segments | GBS
Restructuring Cost and Reserve [Line Items]
Restructuring costs		(4,000,000)		10,000,000	0	12,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed (reversed)		(4,000,000)		10,000,000	0	12,000,000
Operating Segments | GIS
Restructuring Cost and Reserve [Line Items]
Restructuring costs		12,000,000		1,000,000	13,000,000	2,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed (reversed)		12,000,000		1,000,000	13,000,000	2,000,000
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs		(1,000,000)		1,000,000	(1,000,000)	1,000,000
Composition of Workforce Restructuring Liability [Roll Forward]
Costs expensed (reversed)		$ (1,000,000)		$ 1,000,000	$ (1,000,000)	$ 1,000,000

[1] Foreign currency translation adjustments