Stockholder's Equity (Accumlated Other Comprehensive Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Dec. 27, 2013		Dec. 28, 2012		Dec. 27, 2013		Dec. 28, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments, Net of Tax Amount					$ 311	[1]	$ (59)
Total pension and other post retirement benefit plan, Net of Tax Amount	(399)		(14)		(460)		(49)
Total other comprehensive income (loss), Before Tax Amount	405		30		401		4
Total other comprehensive income (loss), Tax (Expense)/Benefit	(9)		(14)		(31)		(41)
Other comprehensive (loss) income, net of taxes	396		16		370		(37)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					(1,354)		(1,093)
Current-period other comprehensive (loss) income, net of taxes					311	[1]	(59)
Amounts reclassified from accumulated other comprehensive loss, net of taxes and non-controlling interest					(42)		(40)
Balance at end of period	(1,001)		(1,112)		(1,001)		(1,112)
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments, Before Tax Amount	(3)		10		(88)		(77)
Foreign currency translation adjustments, Tax (Expense)/Benefit	0		(8)		(2)		(9)
Foreign currency translation adjustments, Net of Tax Amount	(3)		2		(90)		(86)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Current-period other comprehensive (loss) income, net of taxes	(3)		2		(90)		(86)
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial gain/loss arising during the year, Before Tax Amount	388	[2]	0		399	[1]	(4)
Net actuarial gain/loss arising during the year, Tax (Expense)/Benefit	(4)	[2]	0		(6)	[1]	1
Net actuarial gain/loss arising during the year, Net of Tax Amount	384	[2]	0		393	[1]	(3)
Prior service cost/credit arising during the year, Before Tax Amount			0				28
Prior service cost/credit arising during the year, Tax (Expense)/Benefit			0				(8)
Prior service cost/credit arising during the year, Net of Tax Amount			0				20
Amortization of net actuarial loss, Before Tax Amount	17	[3]	20	[4]	55	[3]	57	[4]
Amortization of net actuarial loss, Tax (Expense)/Benefit	(4)	[3]	(6)	[4]	(15)	[3]	(17)	[4]
Amortization of net actuarial loss, Net of Tax Amount	13	[3]	14	[4]	40	[3]	40	[4]
Settlement, Before Tax Amount	3	[5]			35	[6]
Settlement, Tax (Expense)/Benefit	(1)	[5]			(8)	[6]
Settlement, Net of Tax Amount	2	[5]			27	[6]
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments, Net of Tax Amount					(90)	[1]	(86)
Foreign currency exchange rate changes, Before Tax Amount			0				0
Foreign currency exchange rate changes, Tax (Expense)/Benefit			0				(8)
Foreign currency exchange rate changes, Net of Tax Amount			0				(8)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					77		160
Current-period other comprehensive (loss) income, net of taxes					(90)	[1]	(86)
Amounts reclassified from accumulated other comprehensive loss, net of taxes and non-controlling interest					0		0
Balance at end of period	(13)		74		(13)		74
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments, Net of Tax Amount					401	[1]	27
Total pension and other post retirement benefit plan, Before Tax Amount	408		20		489		81
Total pension and other post retirement benefit plan, Tax (Expense)/Benefit	(9)		(6)		(29)		(32)
Total pension and other post retirement benefit plan, Net of Tax Amount	399		14		460		49
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period					(1,431)		(1,253)
Current-period other comprehensive (loss) income, net of taxes					401	[1]	27
Amounts reclassified from accumulated other comprehensive loss, net of taxes and non-controlling interest					(42)		(40)
Balance at end of period	$ (988)		$ (1,186)		$ (988)		$ (1,186)

[1] Represents the result of remeasurement of the pension and OPEB liability associated with the settlement of ATD's pension and retiree medical plans due to CSC's completion of the sale of ATD during the second quarter of fiscal 2014, as well as the result of remeasurement of the pension liability associated with pension plans in the U.K. and Switzerland (see Note 9).

[2] Represents the result of remeasurement of the pension liability associated with pension plans in the U.K. and Switzerland (see Note 9).

[3] Represents current period reclassification out of accumulated other comprehensive loss. The reclassified amounts are included in the net periodic pension cost and net periodic post-retirement benefit cost (see Note 9).

[4] Represents current period reclassification out of accumulated other comprehensive loss. The reclassified amounts are included in the net periodic pension cost and net periodic post-retirement benefit cost of the third quarter and the first nine months of fiscal 2013, respectively (see Note 9).

[5] Represents the settlement of a pension plan in Switzerland due to restructuring activities (see Note 9).

[6] Represents the settlement of ATD's pension and and retiree medical plans due to CSC's completion of the sale of ATD during the second quarter of fiscal 2014, as well as the settlement of a pension plan in Switzerland due to restructuring activities (see Note 9).