Earnings Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Jun. 28, 2013	Jun. 29, 2012
Net income attributable to CSC common shareholders [Abstract]
From continuing operations	$ 138	$ 15
From discontinued operations	18	25
Net income attributable to CSC common stockholders	$ 156	$ 40
Common share information [Abstract]
Weighted average common shares outstanding for basic EPS (in shares)	149,854,000	155,227,000
Dilutive effect of stock options and equity awards (in shares)	2,384,000	420,000
Shares for diluted earnings (loss) per share (in shares)	152,238,000	155,647,000
Basic EPS:
Continuing operations (in dollars per share)	$ 0.92	$ 0.10
Discontinued operations (in dollars per share)	$ 0.12	$ 0.16
Basic EPS (in dollars per share)	$ 1.04	$ 0.26
Diluted EPS:
From continuing operations - diluted EPS (in dollars per share)	$ 0.91	$ 0.10
From discontinued operations - diluted EPS (in dollars per share)	$ 0.11	$ 0.16
Diluted EPS (in dollars per share)	$ 1.02	$ 0.26
Antidilution Due To Exercise Price Exceeding Average Market Price [Member] | Stock options [Member]
Diluted EPS:
Antidilutive securities excluded from computation	7,720,029	18,651,252