Retirement and Postretirement Benefit Plans - Summary of Assets of Plans Held in Trust (Detail)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
U.S., Postretirement Defined Benefit [Member] | Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	27.00%	27.00%
Postretirement benefit plan, target allocation, minimum	15.00%
Postretirement benefit plan, target allocation, maximum	30.00%
U.S., Postretirement Defined Benefit [Member] | Debt securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	71.00%	69.00%
Postretirement benefit plan, target allocation, minimum	65.00%
Postretirement benefit plan, target allocation, maximum	85.00%
U.S., Postretirement Defined Benefit [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	2.00%	4.00%
Postretirement benefit plan, target allocation, minimum	0.00%
Postretirement benefit plan, target allocation, maximum	15.00%
U.S., Pension Plans [Member] | Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	52.00%	51.00%
U.S., Pension Plans [Member] | Debt securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	47.00%	48.00%
U.S., Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	1.00%	1.00%
International, Pension Plans [Member] | Equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	40.00%	33.00%
International, Pension Plans [Member] | Debt securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	59.00%	64.00%
International, Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	1.00%	3.00%