Legal Proceedings - Additional Information (Detail) (USD $)	1 Months Ended		6 Months Ended	12 Months Ended			1 Months Ended		1 Months Ended	3 Months Ended			1 Months Ended	12 Months Ended						1 Months Ended
	Oct. 31, 2012	Jul. 31, 2008 LegalMatter	Mar. 31, 2012 Item LegalMatter	Jan. 31, 2014	Sep. 27, 2013	Jan. 31, 2013	Mar. 31, 2012 Timekeeping Contract with City of New York	Nov. 30, 2012 Data Privacy Litigation	Sep. 30, 2004 Stockholder Derivative Cases LegalMatter	Apr. 30, 2011 Stockholder Derivative Cases LegalMatter	Apr. 30, 2012 Securities Class Actions executive LegalMatter	Apr. 30, 2011 Securities Class Actions LegalMatter	Jul. 31, 2013 Greek Government Contract	Jan. 31, 2014 Greek Government Contract	Nov. 30, 2008 Greek Government Contract Invoice for Undisputed Portion of Contract	Jan. 31, 2014 Greek Government Contract Letters of Credit Relating to Delivery	Jan. 31, 2014 Greek Government Contract Standby Letters of Credit	Jan. 31, 2014 Greek Government Contract Value Added Taxes	Jan. 31, 2014 Greek Government Contract Letters of Credit Related System Support and Maintenance Letters of Credit Relating to Delivery	Dec. 31, 2010 Nuclear Regulatory Commission Breach of Contract	Jul. 31, 2008 Nuclear Regulatory Commission Breach of Contract	Sep. 30, 2004 Nuclear Regulatory Commission Breach of Contract LegalMatter	Oct. 31, 2008 Nuclear Regulatory Commission False Claims Act Claims	Jul. 31, 2008 Nuclear Regulatory Commission False Claims Act Claims
Legal Proceedings [Line Items]
Cash settlement payment							$ 500,000,000
DPA provides that the monitor will serve for a period (in years)				3 years
Number of lawsuits			7							6	3
Number of patients (in millions)			5,000,000
Credit monitoring (in years)			1 year
Period of identity restoration services			1 year
Damages sought	1,000
Judgments or settlements relating to the claims								10,000,000
Estimated loss, minimum								10,000,000
Number of lawsuits, withdrawn									2	2	1	1
Number of lawsuits, consolidated										4	2	3										2
Number of False Claims		2
Number of former CEO's											2
Cases reviewed by the board												2
Company received an arbitral award													53,000,000	26,000,000
Contracts receivable															19,000,000			34,000,000
Recorded losses														123,000,000
Receivables relating to value added taxes																		16,000,000
Amount outstanding				0	500,000,000	0													3,000,000
Letter of credit available to the company																20,000,000	22,000,000
Loss related to litigation settlement																				78	78
Judgment rescinded on appeal																							$ 585,000	$ 2,000,000