Director Stock Payment Period in Days

No definition available.

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- Definition

Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Net

+ References

No definition available.

+ Details

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- Definition

Optional Payment Installments Annual

+ References

No definition available.

+ Details

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- Definition

Postretirement Benefits Plan Vesting Period

+ References

No definition available.

+ Details

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- Definition

Time Based Stock Vesting Period Years

+ References

No definition available.

+ Details

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- Definition

The total fair value of shares issued during the period under a deferred compensation arrangement.

+ References

+ Details

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Period Type:	duration

- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

+ Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

+ Details

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Period Type:	instant

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

+ References

+ Details

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Stock-Based Compensation and Incentive Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 31, 2014 D	Mar. 31, 2012 Installment D	Mar. 31, 2013	Mar. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding	1,370,056	1,725,424	1,556,275	1,875,476
Intrinsic value of options outstanding	$ 6,400,000
Intrinsic value of options exercisable	6,400,000
Fair value of non-vested shares	$ 48.68	$ 50.56	$ 50.48	$ 49.80
Director stock payment period, units	15	15
Optional payment installments, annual		5
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of stock units granted	115,000	100,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period	3 months
Optional payment installments, annual	2
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period	10 years
Optional payment installments, annual	10
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period, years	3 years
Post retirement period to exercise vested options	2 years
Total unrecognized stock compensation costs	0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized stock compensation costs	4,800,000
Time-based stock vesting period, years	4
Total unrecognized stock compensation costs, net of tax	3,800,000
Fair value of non-vested shares	$ 54.75	$ 51.43	$ 50.95	$ 51.13
Restricted Stock \| Time Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation outstanding number	49,861
Restricted Stock \| Performance Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation outstanding number	37,861
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized stock compensation costs	34,200,000
Total unrecognized stock compensation costs, net of tax	21,700,000
Restricted Stock Units (RSUs) \| Time Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation outstanding number	228,207
Restricted Stock Units (RSUs) \| Performance Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation outstanding number	0
Phantom Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized stock compensation costs	3,100,000
Total unrecognized stock compensation costs, net of tax	$ 2,800,000
Fair value of non-vested shares	$ 50.94	$ 49.23	$ 51.74	$ 46.08
Phantom Stock Plan \| Time Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation outstanding number	30,689
Phantom Stock Plan \| Non-Vested Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of non-vested shares	$ 48.62
Phantom Stock Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period, years	3 years
Phantom Stock Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period, years	4 years