Deferred Revenue (Tables)

12 Months Ended

Mar. 31, 2012

Deferred Revenue Disclosure [Abstract]

Components of deferred revenue

	March 31,
	2012		2011
	(In millions)
Current:
Maintenance	$	699.1	$	653.1
License		328.0		338.8
Professional services		32.4		35.0
Total current deferred revenue		1,059.5		1,026.9
Long-term:
Maintenance		568.1		581.3
License		362.7		347.3
Professional services		3.6		—
Total long-term deferred revenue		934.4		928.6
Total deferred revenue	$	1,993.9	$	1,955.5