Retirement and Postretirement Benefit Plans - Summary of Significant Weighted-Average Assumptions, Determine Benefit Obligations and Net Periodic Benefit Cost (Detail)	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
U.S., Postretirement Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations at measurement date	3.50%	4.25%
Net periodic benefit cost	4.25%	3.75%
Expected long-term return on plan assets	6.50%	6.50%
Health Care Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
For year following February 28 or 29	8.00%	8.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	5.00%	5.00%
Year the rate reaches the ultimate trend rate	2021	2021
U.S., Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets	6.75%	6.75%
Rate of compensation increase		6.50%
U.S., Pension Plans [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations at measurement date	3.25%	4.00%
Net periodic benefit cost	4.00%	3.75%
U.S., Pension Plans [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations at measurement date	3.50%	4.25%
Net periodic benefit cost	4.25%	4.50%
International, Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations at measurement date	3.40%	4.05%
Net periodic benefit cost	4.05%	3.90%
Expected long-term return on plan assets	5.25%	5.00%
Rate of compensation increase	3.00%	3.00%