Segment Information (Details) (USD $)	3 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Dec. 30, 2011
Segment Reporting Information [Line Items]
Revenues	$ 3,260,000,000	$ 3,633,000,000
Operating income	304,000,000	146,000,000
Depreciation and amortization	255,000,000	262,000,000
Change in accounting estimate, reduction in operating income			1,500,000,000
GBS [Member]
Segment Reporting Information [Line Items]
Number of Operating Segments	3
GBS [Member] | Segment As Reported [Member]
Segment Reporting Information [Line Items]
Revenues	1,083,000,000	1,278,000,000
Operating income	101,000,000	66,000,000
Depreciation and amortization	41,000,000	47,000,000
GBS [Member] | Segment Out of Period Adjustments Increase (Decrease) [Member]
Segment Reporting Information [Line Items]
Revenues	19,000,000	8,000,000
Operating income	13,000,000	(3,000,000)
Depreciation and amortization	0	1,000,000
GBS [Member] | Segment Adjusted [Member]
Segment Reporting Information [Line Items]
Revenues	1,102,000,000	1,286,000,000
Operating income	114,000,000	63,000,000
Depreciation and amortization	41,000,000	48,000,000
GIS [Member] | Segment As Reported [Member]
Segment Reporting Information [Line Items]
Revenues	1,150,000,000	1,203,000,000
Operating income	82,000,000	16,000,000
Depreciation and amortization	174,000,000	173,000,000
GIS [Member] | Segment Out of Period Adjustments Increase (Decrease) [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Operating income	(3,000,000)	1,000,000
Depreciation and amortization	0	(3,000,000)
GIS [Member] | Segment Adjusted [Member]
Segment Reporting Information [Line Items]
Revenues	1,150,000,000	1,203,000,000
Operating income	79,000,000	17,000,000
Depreciation and amortization	174,000,000	170,000,000
NPS [Member] | Segment As Reported [Member]
Segment Reporting Information [Line Items]
Revenues	1,053,000,000	1,183,000,000
Operating income	121,000,000	93,000,000
Depreciation and amortization	37,000,000	40,000,000
NPS [Member] | Segment Out of Period Adjustments Increase (Decrease) [Member]
Segment Reporting Information [Line Items]
Revenues	0	(2,000,000)
Operating income	(1,000,000)	3,000,000
Depreciation and amortization	0	0
NPS [Member] | Segment Adjusted [Member]
Segment Reporting Information [Line Items]
Revenues	1,053,000,000	1,181,000,000
Operating income	120,000,000	96,000,000
Depreciation and amortization	37,000,000	40,000,000
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	4,000,000	3,000,000
Operating income	0	(29,000,000)
Depreciation and amortization	3,000,000	2,000,000
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(30,000,000)	(34,000,000)
Operating income	0	0
Depreciation and amortization	$ 0	$ 0