Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidated Statement of Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	$ 156	$ 242	$ 307	$ 419
Foreign currency translation adjustments	(133)	(1)	(99)	(84)
Pension and other post-retirement benefit plans, net of taxes	(3)	1	(4)	0
Other comprehensive income (loss), net of taxes	(141)	0	(109)	(84)
Comprehensive income (loss)	15	242	198	335
Comprehensive income (loss) attributable to noncontrolling interest	5	19	10	22
Comprehensive income (loss) attributable to CSC common stockholders	10	223	188	313
Previous accounting methods
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	141		276	368
Foreign currency translation adjustments	(130)
Pension and other post-retirement benefit plans, net of taxes	9
Other comprehensive income (loss), net of taxes	(126)
Previous accounting methods | As previously reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income		209	276	368
Foreign currency translation adjustments		(3)	(90)	(87)
Pension and other post-retirement benefit plans, net of taxes		46	18	61
Other comprehensive income (loss), net of taxes		43	(78)	(26)
Comprehensive income (loss)		252		342
Comprehensive income (loss) attributable to noncontrolling interest		9		13
Comprehensive income (loss) attributable to CSC common stockholders		243		329
Impact of change in accounting methods
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	15	33	31	51
Foreign currency translation adjustments	(3)	2	(9)	3
Pension and other post-retirement benefit plans, net of taxes	(12)	(45)	(22)	(61)
Other comprehensive income (loss), net of taxes	(15)	(43)	(31)	(58)
Comprehensive income (loss)		(10)		(7)
Comprehensive income (loss) attributable to noncontrolling interest		10		9
Comprehensive income (loss) attributable to CSC common stockholders		$ (20)		$ (16)