Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2015	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Pension Plans
Employee Benefit Plans (Details) [Line Items]
Pension Contributions	$ 1.3
Other Pension Plan, Defined Benefit
Employee Benefit Plans (Details) [Line Items]
Benefit cost of settlement event		0.6	0	4.3	0
United States Pension Plan
Employee Benefit Plans (Details) [Line Items]
Pension Contributions				0
United Kingdom Pension Plan
Employee Benefit Plans (Details) [Line Items]
Pension Contributions				$ 1.0