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- Definition

Maximum Percentage That Employees Authorized For Payroll Deductions

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- Definition

Minimum Percentage That Employees Authorized For Payroll Deductions

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- Definition

Number of Shares Available for Grant, Employee Stock Purchase Plans

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- Definition

Percentage Allowed Of Exercise Price Of Stock Options Compared To Fair Market Value On Date Of Grant

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No definition available.

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

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No definition available.

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

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No definition available.

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- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

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- Definition

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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- Definition

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

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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.

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No definition available.

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

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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

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Amount of stock repurchase plan authorized.

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No definition available.

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- Definition

Amount remaining of a stock repurchase plan authorized.

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No definition available.

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- Definition

Number of shares that have been repurchased and retired during the period.

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- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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(Stock-Based Compensation And Employee Benefit Plans Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended			35 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2017	May 08, 2017	Feb. 17, 2016	May 04, 2015	May 05, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Income Tax Expense (Benefit)	$ 103	$ (389)	$ 19
Tax costs from exercise of stock options	$ 65	$ 86	22
Common Stock, Shares, Outstanding	308.0	301.0		308.0
Deferred Compensation Plan Assets	$ 8	$ 8		$ 8
Deferred Compensation Liability, Classified, Noncurrent	9	9		9
Deferred Compensation Arrangement with Individual, Employer Contribution	28	27	27
Stock Repurchased and Retired During Period, Value	508	1,018	$ 337
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 31			$ 31
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	24.3			24.3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 12.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 39	$ 38	$ 22
Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Allowed Of Exercise Price Of Stock Options Compared To Fair Market Value On Date Of Grant	100.00%
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	12.9
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	3.0
Number of Shares Available for Grant, Employee Stock Purchase Plans	7.4			7.4
Minimum Percentage That Employees Authorized For Payroll Deductions	2.00%
Maximum Percentage That Employees Authorized For Payroll Deductions	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	85.00%
Employee Stock [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP Exercise Price For Shares Issued	$ 54.60	$ 32.16	$ 22.64
Employee Stock [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP Exercise Price For Shares Issued	$ 67.56	$ 54.78	$ 32.16
Restricted Stock Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	17.0			17.0
May 2014 Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount								$ 750
Stock Repurchased and Retired During Period, Value	$ 0	$ 57	$ 337	$ 394
Stock Repurchased and Retired During Period, Shares	0.0	1.0	8.0	9.2
May 2015 Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount							$ 1,000
Stock Repurchased and Retired During Period, Value	$ 508	$ 461	$ 0
Stock Repurchased and Retired During Period, Shares	6.5	6.9	0.0
February 2016 Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount						$ 500
Stock Repurchased and Retired During Period, Value	$ 0	$ 500	$ 0
Stock Repurchased and Retired During Period, Shares	0.0	7.8	0.0
Stock-based compensation expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Income Tax Expense (Benefit)	$ 43	$ 38
Subsequent Event [Member] \| May 2017 Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount					$ 1,200