Employee Benefit Plans (Details) - Schedule of targeted weighted average asset allocations	12 Months Ended
	May 31, 2014
US Pension Plan [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	100.00%
US Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	30.00%
US Pension Plan [Member] | Debt and cash equivalent [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	70.00%
US Pension Plan [Member] | Real estate and other [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	0.00%
UK Pension Plan [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	100.00%
UK Pension Plan [Member] | Equity Securities [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	40.00%
UK Pension Plan [Member] | Debt and cash equivalent [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	30.00%
UK Pension Plan [Member] | Real estate and other [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Targeted asset allocation	30.00%