Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2013

Investments All Other Investments [Abstract]

Input Levels And Valuation Techniques For Determination Of Fair Values Of Financial Instruments

The fair values of our financial instruments were determined using the following input levels and valuation techniques:

	Valuation		March 31, 2013								March 31, 2012
	Technique		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
									(In millions)
Assets
Cash equivalents
Money-market funds		A	$	0.2	$	—	$	—	$	0.2	$	769.3	$	—	$	—	$	769.3
United States Treasury securities		A		75.0		—		—		75.0		49.9		—		—		49.9
Short-term and long-term investments
United States Treasury securities		A		102.1		—		—		102.1		92.2		—		—		92.2
Auction rate securities		B		—		—		19.9		19.9		—		—		26.9		26.9
United States government agency bonds		A		—		23.4		—		23.4		—		—		—		—
Corporate bonds and commercial paper		A		—		36.4		—		36.4		—		—		—		—
Mutual funds		A		20.9		—		—		20.9		19.6		—		—		19.6
Foreign currency forward contracts		A		—		5.5		—		5.5		—		8.1		—		8.1
Total			$	198.2	$	65.3	$	19.9	$	283.4	$	931.0	$	8.1	$	26.9	$	966.0
Liabilities
Foreign currency forward contracts		A	$	—	$	0.5	$	—	$	0.5	$	—	$	0.6	$	—	$	0.6
Interest rate swap		B		—		—		0.3		0.3		—		—		—		—
Total			$	—	$	0.5	$	0.3	$	0.8	$	—	$	0.6	$	—	$	0.6

Summary Of Activity In Level 3 Financial Instruments

The following table summarizes the activity in Level 3 financial instruments:

	Year Ended March 31,
	2013						2012
	Auction			Interest						Auction
	Rate			Rate						Rate
	Securities			Swap			Total			Securities
	(In millions)
Balance at the beginning of the period	$	26.9		$	—		$	26.9		$	27.2
Redemptions and sales		(7.7	)		—			(7.7	)		(0.5	)
Change in fair value included in other comprehensive income		0.7			(0.3	)		0.4			0.2
Balance at the end of the period	$	19.9		$	(0.3	)	$	19.6		$	26.9

Components Of Cash, Cash Equivalents And Investments

Our cash, cash equivalents and investments were comprised of the following:

	Year Ended March 31,
	2013						2012
	Cash and						Cash and
	Cash		Short-term		Long-term		Cash		Short-term		Long-term
	Equivalents		Investments		Investments		Equivalents		Investments		Investments
	(In millions)
Measured at fair value:
Available-for-sale
United States Treasury securities	$	75.0	$	102.1	$	—	$	49.9	$	86.1	$	6.1
Auction rate securities		—		—		19.9		—		—		26.9
United States government agency bonds		—		5.0		18.4		—		—		—
Corporate bonds and commercial paper		—		24.1		12.3		—		—		—
Trading
Mutual funds		—		—		20.9		—		—		19.6
Total debt and equity investments measured at fair value		75.0		131.2		71.5		49.9		86.1		52. 6
Cash on hand		1,281.8		—		—		632.6		—		—
Certificates of deposit		22.2		—		—		45.1		—		—
Money-market funds		0.2		—		—		769.3		—		—
Total cash, cash equivalents and investments	$	1,379.2	$	131.2	$	71.5	$	1,496.9	$	86.1	$	52.6
Amounts included in accumulated other comprehensive income from available-for-sale securities (pre-tax):
Unrealized losses*	$	—	$	—	$	1.7	$	—	$	—	$	2.4

* The unrealized losses on available-for-sale securities at March 31, 2013 and 2012 relate to the auction rate securities.

Contractual Maturities Of Available-For-Sale Investments In Debt Securities

The following summarizes the underlying contractual maturities of our available-for-sale investments in debt securities:

	Year Ended March 31,
	2013				2012
			Fair				Fair
	Cost		Value		Cost		Value
	(In millions)
Due in one year or less	$	206.2	$	206.2	$	136.0	$	136.0
Due between one and two years		30.7		30.7		6.1		6.1
Due after ten years		21.6		19.9		29.3		26.9
Total	$	258.5	$	256.8	$	171.4	$	169.0

Notional Amounts At Contract Exchange Rates Of Foreign Currency Forward Contracts

The notional amounts at contract exchange rates of our foreign currency forward contracts outstanding were:

	Notional Amount
	March 31,
	2013		2012
	(In millions)
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)
Euro	$	128.3	$	214.2
British pound		18.8		19.2
Chinese yuan renminbi		16.3		11.7
Australian dollar		12.2		29.9
Swiss franc		10.1		6.8
Singapore dollar		6.7		3.8
Danish krone		5.0		3.9
New Zealand dollar		4.0		3.4
Brazilian real		3.8		8.7
South Korean won		3.0		2.6
Norwegian krone		2.0		2.9
Swedish krona		1.8		8.2
Mexican peso		1.4		3.2
Other		3.6		3.5
Total	$	217.0	$	322.0
Foreign Currency Forward Contracts (pay United States dollar/receive foreign currency)
Israeli shekel	$	178.1	$	158.2
Indian rupee		14.7		15.0
Other		—		4.8
Total	$	192.8	$	178.0

Finance Receivables Balance, Net Of Allowance, By Region And By Class Of Internal Credit Rating

At March 31, 2013 and 2012, our finance receivables balances, net of allowances, by region and by class of internal credit rating are as follows:

	North America		EMEA		Asia Pacific		Latin America		Total
	(In millions)
Class 1	$	75.7	$	29.9	$	2.4	$	1.2	$	109.2
Class 2		36.8		18.3		8.2		2.0		65.3
Class 3		0.1		2.9		0.2		0.5		3.7
Balance as of March 31, 2013	$	112.6	$	51.1	$	10.8	$	3.7	$	178.2
Class 1	$	73.6	$	40.3	$	12.7	$	1.8	$	128.4
Class 2		26.7		22.7		4.0		4.6		58.0
Class 3		0.1		0.3		0.6		0.7		1.7
Balance as of March 31, 2012	$	100.4	$	63.3	$	17.3	$	7.1	$	188.1

Carrying Values And Fair Values Of Fixed-Rate Debt Instruments

The carrying values and fair values of our fixed-rate debt instruments at March 31, 2013 and 2012 are as follows:

	March 31,
	2013				2012
	Carrying value		Fair value		Carrying value		Fair value
	(In millions)
Senior unsecured notes due June 2018 (Level 2)	$	299.1	$	350.9	$	298.9	$	368.4
Senior unsecured notes due February 2022 (Level 2)		497.6		517.9		497.4		506.6
Senior unsecured notes due December 2022 (Level 2)		297.8		316.8		—		—