Share-Based Compensation (Tables)

12 Months Ended

Mar. 31, 2012

Share-Based Compensation [Abstract]

Weighted average assumptions used to estimate the fair value of share-based payments

	Year Ended March 31,
	2012			2011			2010
Expected volatility		33	%		35	%		35	%
Risk-free interest rate %		0.5	%		0.6	%		2.0	%
Expected term (in years)		3			3			4
Dividend yield		—			—			—

Share-based compensation activity - stock options

Stock Options	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term		Aggregate Intrinsic Value
	(In millions)					(In years)		(In millions)
Outstanding at March 31, 2011		7.2		$	30		3	$	144.9
Granted		—		$	—
Exercised		(1.5	)	$	26
Cancelled or expired		(0.2	)	$	34
Outstanding at March 31, 2012		5.5		$	30		2	$	57.1
Vested at March 31, 2012 and expected to vest		5.5		$	30		2	$	57.0
Exercisable at March 31, 2012		5.3		$	30		2	$	55.9

Share-based compensation activity - nonvested stock units

Nonvested Stock Units	Shares			Weighted- Average Grant Date Fair Value		Weighted- Average Remaining Vesting Term
	(In millions)					(In years)
Outstanding at March 31, 2011		6.3		$	39		1
Granted		4.6		$	42
Vested		(2.7	)	$	38
Cancelled or expired		(0.8	)	$	41
Outstanding at March 31, 2012		7.4		$	41		1

Weighted average grant date fair value and additional intrinsic value and vesting information

		xxxxxx		xxxxxx		xxxxxx
	Year Ended March 31,
	2012		2011		2010
Weighted Average Fair Value
Per grant of stock options	$	—	$	—	$	10
Per grant of nonvested stock units	$	42	$	42	$	37
Share-Based Payment and Stock Option Values
Intrinsic value of stock options exercised (millions)	$	32.1	$	75.5	$	63.0
Fair value of nonvested stock units that vested (millions)	$	118.7	$	79.7	$	38.9
Weighted average grant date fair value of nonvested stock units that vested	$	38	$	35	$	32

Outstanding options

	Outstanding Options						Exercisable Options
Range of Exercise Prices	Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life		Shares		Weighted- Average Exercise Price
$0.00 – 17.40		0.9	$	16		2		0.9	$	16
$17.41 – 19.93		0.5	$	19		3		0.5	$	19
$19.94 – 25.41		0.2	$	22		2		0.2	$	22
$25.42 – 31.69		0.5	$	28		4		0.4	$	28
$31.70 – 32.15		1.1	$	32		1		1.1	$	32
$32.16 – 36.84		0.4	$	36		2		0.4	$	36
$36.85 – 39.30		1.9	$	39		2		1.8	$	39

Share-based compensation expense

	Year Ended March 31,
	2012			2011			2010
	(In millions)
Cost of license revenue	$	4.7		$	3.4		$	2.5
Cost of maintenance revenue		15.2			9.8			7.9
Cost of professional services revenue		5.3			5.1			3.9
Selling and marketing expenses		39.7			35.1			31.6
Research and development expenses		13.3			10.5			10.1
General and administrative expenses		49.0			42.6			32.9
Total share-based compensation expense		127.2			106.5			88.9
Income tax benefit		(37.2	)		(27.3	)		(27.2	)
Total share-based compensation expense after taxes	$	90.0		$	79.2		$	61.7