| **Consolidated Balance Sheets (Parenthetical) (USD $)Share data in Millions, except Per Share data, unless otherwise specified** | Mar. 31, 2014 | Mar. 31, 2013 |
|----------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|
| Receivables, allowances                                                                                                          | $ 186         | $ 200         |
| Interest rate percentage on convertible senior notes, due 2016                                                                   | 0.75%         | 0.75%         |
| Preferred stock, par value                                                                                                       | $ 0.01        | $ 0.01        |
| Preferred stock, shares authorized                                                                                               | 10            | 10            |
| Common stock, par value                                                                                                          | $ 0.01        | $ 0.01        |
| Common stock, shares authorized                                                                                                  | 1,000         | 1,000         |
| Common stock, shares issued                                                                                                      | 311           | 302           |
| Common stock, shares outstanding                                                                                                 | 311           | 302           |

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| - Definition
A provision for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible, an estimate for product returns, and an estimate for price protection.
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| - Definition
Face amount or stated value per share of common stock.
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| - Definition
The maximum number of common shares permitted to be issued by an entity's charter and bylaws.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.
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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
Contractual interest rate for funds borrowed, under the debt agreement.
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| - Definition
Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.
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| - Definition
The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.
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