Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount

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- Definition

Employee service share based compensation period to purchase shares through payroll deductions

+ References

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- Definition

Restructuring Charge, Non-Cash Credits, Share-based Compensation

+ References

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested

+ References

No definition available.

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Discount rate from fair value on offering date that participants pay for shares.

+ 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=96867065&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ 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 (a)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

+ Details

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Share-Based Compensation - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Jul. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash credits			$ 14
Discrete tax benefits	$ 8	$ 54	$ 0
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award contractual term	7 years
Stock award vesting period	4 years
RSUs \| Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested RSUs (in shares)	117,000
RSUs \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period	3 years
RSUs \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period	4 years
PeRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period	4 years
TSRUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period	3 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	21,000,000
Number of shares available for grant	3,000,000
Period over which payroll is deducted to purchase shares	3 months
Percentage of market price for share purchase	85.00%
Percentage of market price deduction for share purchases	15.00%
2013 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized				30,000,000
Number of shares available for grant	28,000,000
New Accounting Pronouncement, Early Adoption, Effect
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discrete tax benefits	$ 8	$ 54