Retirement and Postretirement Benefit Plans - Summary of Plan Assets Allocation (Detail)	12 Months Ended
Feb. 28, 2015	Feb. 28, 2014
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%	71.00%
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%	2.00%
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	50.00%	52.00%
U.S., Pension Plans [Member] \| Debt securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	49.00%	47.00%
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	34.00%	40.00%
International, Pension Plans [Member] \| Debt securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	65.00%	59.00%
International, Pension Plans [Member] \| Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assets held in trust	1.00%	1.00%

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920

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- Definition

Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

+ Details

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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