Retirement and Postretirement Benefit Plans - Summary of Information Defined Benefit Pension Plans and Postretirement Benefits Plan (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Pension Plans [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	$ 184,344	$ 170,160
Service cost	1,369	1,106	957
Interest cost	7,394	8,353	8,757
Participant contributions	22	29
Plan amendments	232	924
Actuarial loss (gain)	6,970	15,310
Benefit payments	(11,035)	(11,036)
Currency exchange rate changes	(1,150)	(502)
Benefit obligation at end of year	188,146	184,344	170,160
Change in plan assets:
Fair value of plan assets at beginning of year	106,341	107,881
Actual return on plan assets	7,774	7,172
Employer contributions	2,424	2,736
Participant contributions	22	29
Benefit payments	(11,035)	(11,036)
Currency exchange rate changes	(1,005)	(441)
Fair value of plan assets at end of year	104,521	106,341	107,881
Funded status at end of year	(83,625)	(78,003)
Postretirement Benefit Plans [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	82,344	91,035
Service cost	684	726	2,290
Interest cost	2,841	3,929	6,014
Participant contributions	3,963	4,585
Retiree drug subsidy payments	822	1,072
Actuarial loss (gain)	(15,880)	(10,726)
Benefit payments	(7,322)	(8,277)
Benefit obligation at end of year	67,452	82,344	91,035
Change in plan assets:
Fair value of plan assets at beginning of year	57,563	66,935
Actual return on plan assets	1,319	(1,301)
Employer contributions	(3,729)	(4,379)
Participant contributions	3,963	4,585
Benefit payments	(7,322)	(8,277)
Fair value of plan assets at end of year	51,794	57,563	66,935
Funded status at end of year	$ (15,658)	$ (24,781)

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)

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Amount of gain (loss) from a decision to temporarily deviate from the substantive plan, or from a change in benefit obligation or plan asset value from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover or salary scale.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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-Glossary Postretirement Benefits

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The increase in the fair value of plan assets from contributions made by the employer.

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The amount of contributions made by plan participants. This item represents a periodic increase to the plan obligation and an increase to plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency.

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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Amount of the period's gross receipts received from the prescription drug subsidy, which is to be used in the roll forward of the accumulated postretirement benefit obligation of an applicable postretirement benefit plan.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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