Restructuring Costs (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Apr. 03, 2015	Apr. 01, 2016		Apr. 03, 2015		Mar. 28, 2014
Restructuring Reserve [Roll Forward]
Restructuring costs		$ 23	[1]	$ 256	[2]	$ 74	[2]
Restructuring liability	$ 240	89		240
Accrued expenses and other current liabilities		84		240
Other long-term liabilities		5		0
Costs of services
Restructuring Reserve [Roll Forward]
Restructuring costs		7		248		68
Selling, general and administrative
Restructuring Reserve [Roll Forward]
Restructuring costs		16		8		6
Restructuring Plan Fiscal 2016 Plan
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		0
Restructuring costs		66
Cash paid		(15)
Other		8
Restructuring liability at end of period	0	59		0
Restructuring Plan Fiscal 2016 Plan | Workforce reductions
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		0
Restructuring costs		29
Cash paid		(6)
Other		6
Restructuring liability at end of period	0	29		0
Restructuring Plan Fiscal 2016 Plan | Facilities costs
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		0
Restructuring costs		37
Cash paid		(9)
Other		2
Restructuring liability at end of period	0	30		0
Restructuring Plan Fiscal 2015 Plan
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		231		0
Restructuring costs		(42)		269
Less: costs not affecting restructuring liability				(13)
Cash paid		(152)		(21)
Other		(8)		(4)
Restructuring liability at end of period	231	29		231		0
Restructuring Plan Fiscal 2015 Plan | Workforce reductions
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		230		0
Restructuring costs	241	(42)		265
Less: costs not affecting restructuring liability				(10)
Cash paid	(145)	(152)		(21)
Other		(7)		(4)
Restructuring liability at end of period	230	29		230		0
Restructuring Plan Fiscal 2015 Plan | Facilities costs
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		1		0
Restructuring costs		0		4
Less: costs not affecting restructuring liability				(3)
Cash paid		0		0
Other		(1)		0
Restructuring liability at end of period	1	0		1		0
Restructuring Plan Fiscal 2015 Plan | Pension benefit augmentations
Restructuring Reserve [Roll Forward]
Restructuring costs		7		10
Restructuring Plan Fiscal 2013 Plan
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		8		83
Restructuring costs		(1)		(13)		72
Less: costs not affecting restructuring liability				(7)
Cash paid		(5)		(65)
Other		(1)		(4)
Restructuring liability at end of period	8	1		8		83
Restructuring Plan Fiscal 2013 Plan | Workforce reductions
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		3		70
Restructuring costs		(1)		(13)
Less: costs not affecting restructuring liability				(7)
Cash paid		(3)		(57)
Other		2		(4)
Restructuring liability at end of period	3	1		3		70
Restructuring Plan Fiscal 2013 Plan | Facilities costs
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period		5		13
Restructuring costs		0		0
Less: costs not affecting restructuring liability				0
Cash paid		(2)		(8)
Other		(3)		0
Restructuring liability at end of period	$ 5	0		5		13
Restructuring Plan Fiscal 2013 Plan | Pension benefit augmentations
Restructuring Reserve [Roll Forward]
Restructuring costs		0		(7)		22
Restructuring Plan Fiscal 2012 Plan
Restructuring Reserve [Roll Forward]
Restructuring costs		0		0		2
Operating segments | GBS
Restructuring Reserve [Roll Forward]
Restructuring costs		20		137		46
Operating segments | GIS
Restructuring Reserve [Roll Forward]
Restructuring costs		3		114		28
Corporate
Restructuring Reserve [Roll Forward]
Restructuring costs		$ 0		$ 5		$ 0

[1] Due to the adoption of ASU 2016-09 certain balances related to excess tax benefits from stock compensation were adjusted prospectively as described in Note 1.

[2] Certain prior year balances were adjusted for certain errors in previously issued financial statements related to income taxes as described in Note 1 and to give effect to discontinued operations as described in Note 4.