Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Segment and Geographic Information [Abstract]
Number of lines of business or business sectors	3
Segment Reporting Information [Line Items]
Revenues	$ 4,033	$ 3,910
Operating income (loss)	180	277
Depreciation and amortization	278	256
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	180	277
Corporate G&A	(54)	(36)
Interest expense	(42)	(41)
Interest income	12	8
Other income (expense)	5	3
Income from continuing operations before taxes	101	211
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	3	4
Operating income (loss)	(4)	(15)
Depreciation and amortization	8	7
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	(4)	(15)
NPS [Member]
Segment Reporting Information [Line Items]
Revenues	1,484	1,520
Operating income (loss)	118	128
Depreciation and amortization	36	33
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	118	128
BSS [Member]
Segment Reporting Information [Line Items]
Revenues	961	821
Operating income (loss)	57	56
Depreciation and amortization	33	33
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	57	56
MSS [Member]
Segment Reporting Information [Line Items]
Revenues	1,619	1,598
Operating income (loss)	9	108
Depreciation and amortization	201	183
Decrease in revenue	35
Decrease in operating income	53
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	9	108
MSS [Member] | Segment As Reported [Member]
Segment Reporting Information [Line Items]
Revenues	1,619	1,598
Operating income (loss)	9	108
Depreciation and amortization	201	183
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	9	108
MSS [Member] | Segment Increase (Decrease) [Member]
Segment Reporting Information [Line Items]
Revenues	4	(6)
Operating income (loss)	5	8
Depreciation and amortization	1	(1)
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	5	8
MSS [Member] | Segment Adjusted [Member]
Segment Reporting Information [Line Items]
Revenues	1,623	1,592
Operating income (loss)	14	116
Depreciation and amortization	202	182
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	14	116
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(34)	(33)
Operating income (loss)	0	0
Depreciation and amortization	0	0
Reconciliation of consolidated operating income to income before taxes [Abstract]
Operating income	$ 0	$ 0