Basis of Presentation (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013
Noncontrolling Interest [Abstract]
Number of new shares issued (in shares)			7.36
Shares outstanding after issue (in hundredths)			19.70%
Price per share	$ 10.00		$ 10.00
Non-controlling interest	$ 20,853,000		$ 20,853,000		$ 0
Increase of non-controlling interest			23,000,000
Increase in additional paid in capital			43,300,000
Voting power interest (in hundredths)	80.30%		80.30%
Economic interest (in hundredths)			80.03%
Basis for Revenue Recognition [Abstract]
Standard perpetual license sales, minimum term of maintenance agreement			1 year
Multi-product contracts, minimum term of maintenance agreement			2 years
Multi-product contracts, maximum term of maintenance agreement			5 years
Maintenance fees [Abstract]
Minimum term over which maintenance fees ratably recognized			1 year
Maximum term over which maintenance fees ratably recognized			5 years
Application services fees [Abstract]
Minimum term of customer arrangement for professional services without stand-alone value			1 year
Maximum term of customer arrangement for professional services without stand-alone value			5 years
Expected period over which customer will receive benefit			5 years
Research and development [Abstract]
Research and development costs	23,600,000	26,200,000	72,700,000	77,700,000
Income Taxes [Abstract]
Effective tax rate (in hundredths)			26.50%	36.70%
Cash paid for income taxes			$ 29,300,000	$ 3,700,000