Financial Instruments (Notional Amounts At Contract Exchange Rates Of Foreign Currency Forward Contracts) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	$ 217.0	$ 322.0
Foreign Currency Forward Contracts (pay United States dollar/receive foreign currency)	192.8	178.0
Euro [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	128.3	214.2
British Pound [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	18.8	19.2
Chinese Yuan Renminbi [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	16.3	11.7
Australian Dollar [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	12.2	29.9
Swiss Franc [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	10.1	6.8
Singapore Dollar [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	6.7	3.8
Danish Krone [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	5.0	3.9
New Zealand Dollar [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	4.0	3.4
Brazilian Real [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	3.8	8.7
South Korean Won [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	3.0	2.6
Norwegian Krone [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	2.0	2.9
Swedish Krona [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	1.8	8.2
Mexican Peso [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	1.4	3.2
Other [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (receive United States dollar/pay foreign currency)	3.6	3.5
Foreign Currency Forward Contracts (pay United States dollar/receive foreign currency)		4.8
Israeli Shekel [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (pay United States dollar/receive foreign currency)	178.1	158.2
Indian Rupee [Member]
Derivative [Line Items]
Foreign Currency Forward Contracts (pay United States dollar/receive foreign currency)	$ 14.7	$ 15.0