Employee Benefit Plans (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended				12 Months Ended			0 Months Ended		145 Months Ended	0 Months Ended	12 Months Ended	228 Months Ended		12 Months Ended						0 Months Ended
	Mar. 01, 2002 Overlapping Stock Purchase Period 1 [Member]	Mar. 01, 2002 Overlapping Stock Purchase Period 2 [Member]	Mar. 01, 2002 Overlapping Stock Purchase Period 3 [Member]	Mar. 01, 2002 Overlapping Stock Purchase Period 4 [Member]	Mar. 31, 2014 Defined contribution pension [Member]	Mar. 31, 2013 Defined contribution pension [Member]	Mar. 31, 2012 Defined contribution pension [Member]	Jan. 01, 2012 Employee stock purchase plan, 2001 plan [Member]	Mar. 01, 2002 Employee stock purchase plan, 2001 plan [Member]	Mar. 31, 2014 Employee stock purchase plan, 2001 plan [Member]	May 01, 2006 Employee stock purchase plan, employees in non-US locations [Member]	Mar. 31, 1995 Employee stock purchase plan, employees in non-US locations [Member]	Mar. 31, 2014 Employee stock purchase plan, employees in non-US locations [Member]	Mar. 31, 2014 Supplemental Employee Retirement Plans, Defined Benefit [Member]	Mar. 31, 2014 Management incentive compensation plan [Member]	Mar. 31, 2013 Management incentive compensation plan [Member]	Mar. 31, 2012 Management incentive compensation plan [Member]	Mar. 31, 2014 Cash bonus plan [Member]	Mar. 31, 2013 Cash bonus plan [Member]	Mar. 31, 2012 Cash bonus plan [Member]	Jan. 01, 2005 Maximum [Member] Employee stock purchase plan, 2001 plan [Member]
Deferred compensation arrangement, by type of deferred compensation [Line Items]
Percentage of employee's base salary allowed as employee contribution (in hundredths)					60.00%
Amount of company contributions					$ 3.6	$ 0.8	$ 1.6
Percentage of fair market value of common stock for employee purchase (in hundredths)									85.00%		85.00%
Overlapping period on purchase of common stock under purchase plan (in number of months)	24 months	18 months	12 months	6 months
Maximum automatic increase in number of common stock shares under purchase plan (in shares)																					1,500,000
Percentage of outstanding shares of common stock used to determine automatic annual increase in common stock (in hundredths)																					0.50%
Number of additional shares reserved under purchase plan (in shares)								960,269
Number of shares of common stock reserved for issuance (in shares)										11,277,862			1,500,285
Shares issued under purchase plan (in shares)										5,641,704			830,277
Defined Benefit Plan, Benefit Obligation														6.3
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months														0.8
Defined Benefit Plan, Expected Future Benefit Payments, Year Two Through Year Ten														4.5
Percentage of fair market value of common stock at the beginning or end of semi-annual purchase plan period, during fiscal 1995 (in hundredths)												100.00%
Compensation expense charged against operations															$ 24.4	$ 12.0	$ 7.8	$ 15.2	$ 4.3	$ 3.2