Retirement Plans (Details 3)	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Defined Benefit Plan Assumptions Used In Calculations [Abstract]
Weighted Average Discount Rate Percent TNT pension postretirement plans	2.25%
International PBO of total pension obligation	6.00%
TNT ERO Assets [Member]
Defined Benefit Plan Assumptions Used In Calculations [Abstract]
Expected long-term rate of return on assets	3.29%
Pension Plans [Member]
Defined Benefit Plan Assumptions Used In Calculations [Abstract]
Discount rate used to determine benefit obligation	4.13%	4.42%	4.60%
Discount rate used to determine net periodic benefit cost	4.42%	4.60%	4.79%
Rate of increase in future compensation levels used to determine benefit obligation	4.46%	4.62%	4.56%
Rate of increase in future compensation levels used to determine net periodic benefit cost	4.62%	4.56%	4.54%
Expected long-term rate of return on assets	6.50%	7.75%	7.75%
Pension Plans [Member] | Segment [Member]
Defined Benefit Plan Assumptions Used In Calculations [Abstract]
Expected long-term rate of return on assets	6.50%	6.50%	6.50%
Postretirement Healthcare Plans [Member]
Defined Benefit Plan Assumptions Used In Calculations [Abstract]
Discount rate used to determine benefit obligation	4.41%	4.60%	4.70%
Discount rate used to determine net periodic benefit cost	4.60%	4.70%	4.91%