Document And Entity Information - shares	6 Months Ended
	Oct. 02, 2015	Oct. 23, 2015
Entity Information [Line Items]
Entity Registrant Name	COMPUTER SCIENCES CORP
Entity Central Index Key	0000023082
Current Fiscal Year End Date	--04-01
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Oct. 02, 2015
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		138,783,908