Investigations and Out of Period Adjustments (Impact on Consolidated Statement of Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2011	Mar. 28, 2014	Mar. 29, 2013	Mar. 30, 2012
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenues		$ 12,998	$ 14,195	$ 14,476
Costs of services (excludes depreciation and amortization)		9,567	11,100	12,181
Pre-tax charge to write down claim related assets recorded as a separately itemized charge to cost of services	227	0	0	227
Costs of services - specified contract charge (excludes amount charged to revenue of $204)		0	0	1,281
Selling, general and administrative (excludes restructuring costs of $6 (2014), $26 (2013), and $3 (2012))		1,278	1,176	1,108
Depreciation and amortization		1,018	1,070	1,141
Restructuring costs		76	264	140
Interest expense		147	183	174
Other expense (income), net		18	(25)	4
Income (loss) from continuing operations before taxes		910	449	(4,487)
Tax expense (benefit) on income		289	(49)	(96)
Income from continuing operations, net of tax		621	498	(4,391)
Income from discontinued operations, net of taxes		69	481	166
Net income (loss)		690	979	(4,225)
Net income (loss)		674	961	(4,242)
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)		$ 4.01	$ 3.09	$ (28.44)
Discontinued operations (in dollars per share)		$ 0.46	$ 3.09	$ 1.07
Diluted EPS (in dollars per share)		$ 4.47	$ 6.18	$ (27.37)
Adjustment Increase/(Decrease)
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenues		21	(2)	50
Costs of services (excludes depreciation and amortization)		23	(13)	(28)
Pre-tax charge to write down claim related assets recorded as a separately itemized charge to cost of services				3
Selling, general and administrative (excludes restructuring costs of $6 (2014), $26 (2013), and $3 (2012))		0	0	2
Depreciation and amortization		(2)	(2)	(1)
Restructuring costs		2	3	(5)
Interest expense		0	0	(3)
Other expense (income), net		0	0	2
Income (loss) from continuing operations before taxes		(2)	10	80
Tax expense (benefit) on income		(18)	30	12
Income from continuing operations, net of tax		16	(20)	68
Income from discontinued operations, net of taxes		2	(2)	0
Net income (loss)		18	(22)	68
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)		$ 0.11	$ (0.13)	$ 0.44
Discontinued operations (in dollars per share)		$ 0.01	$ (0.01)	$ 0.00
Diluted EPS (in dollars per share)		$ 0.12	$ (0.14)	$ 0.44
Amount Adjusted for Removal of Errors [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Revenues		13,019	14,193	14,526
Costs of services (excludes depreciation and amortization)		9,590	11,087	12,153
Pre-tax charge to write down claim related assets recorded as a separately itemized charge to cost of services				1,284
Selling, general and administrative (excludes restructuring costs of $6 (2014), $26 (2013), and $3 (2012))		1,278	1,176	1,110
Depreciation and amortization		1,016	1,068	1,140
Restructuring costs		78	267	135
Interest expense		147	183	171
Other expense (income), net		18	(25)	6
Income (loss) from continuing operations before taxes		908	459	(4,407)
Tax expense (benefit) on income		271	(19)	(84)
Income from continuing operations, net of tax		637	478	(4,323)
Income from discontinued operations, net of taxes		71	479	166
Net income (loss)		$ 692	$ 939	$ (4,174)
Earnings Per Share, Diluted [Abstract]
Continuing operations (in dollars per share)		$ 4.12	$ 2.96	$ (28.00)
Discontinued operations (in dollars per share)		$ 0.47	$ 3.08	$ 1.07
Diluted EPS (in dollars per share)		$ 4.59	$ 6.04	$ (26.93)