Financing Arrangement [Line Items]

No definition available.

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- Definition

Shares Received Under Convertible Note Hedge

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

+ References

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Period Type:	instant

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Paragraph 3
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Balance Type:	credit
Period Type:	duration

- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

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Balance Type:	na
Period Type:	duration

- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Latest date before maturity which the issuer can call the outstanding debt instrument for repayment or conversion to equity, in CCYY-MM-DD format.

+ References

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-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

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-Paragraph 4
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

+ References

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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Conversion Rate
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Balance Type:	na
Period Type:	duration

- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Balance Type:	credit
Period Type:	duration

- Definition

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

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Period Type:	duration

- Definition

Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, 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
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Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ Details

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Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

+ Details

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Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

+ Details

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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- Definition

The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
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Balance Type:	credit
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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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- Definition

Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

+ References

No definition available.

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Balance Type:	credit
Period Type:	instant

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Period Type:

- Details

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- Details

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Financing Arrangement (0.75% Convertible senior notes due 2016) (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 31, 2011	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($) shares $ / shares	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Jul. 14, 2011 USD ($) $ / shares
Financing Arrangement [Line Items]
Shares Received Under Convertible Note Hedge \| shares			7,823,000
Temporary equity			$ 2,000,000	$ 31,000,000
Repayments of 0.75% Convertible Senior Notes due 2016			$ 470,000,000	0	$ 0
Debt Conversion, Converted Instrument, Shares Issued \| shares			(7,823,000)
Loss on Conversion of Convertible Notes			$ (10,000,000)	$ 0	$ 0
Convertible Debt
Financing Arrangement [Line Items]
0.75% Convertible Senior Notes due 2016, net, Principal						$ 633,000,000
Debt Instrument, Convertible, Carrying Amount of Equity Component			$ 107,000,000
Contractual interest rate of 0.75% Convertible Senior Notes due 2016						0.75%
0.75% Convertible Senior Notes due 2016, Frequency of Periodic Payment	semiannually
0.75% Convertible Senior Notes due 2016, Issuance Date	Jul. 14, 2011
0.75% Convertible Senior Notes due 2016 description	2016
0.75% Convertible Senior Notes due 2016 maturity date	Jul. 15, 2016
Conversion rate of 0.75% Convertible Senior Notes due 2016	31.5075
0.75% Convertible Senior Notes due 2016, Face Amount						$ 1,000
Debt Instrument, Convertible, Conversion Price \| $ / shares						$ 31.74
0.75% Convertible Senior Notes due 2016, Call Date, Latest			Jul. 13, 2016
Share Price \| $ / shares			$ 65.92
Debt Instrument, Convertible, If-converted Value in Excess of Principal			$ 175,000,000
Repayments of 0.75% Convertible Senior Notes due 2016			470,000,000
Debt Conversion, Converted Instrument, Amount			$ 518,000,000
Effective interest rate						4.54%
Debt issuance costs						$ 15,000,000
0.75% Convertible Senior Notes due 2016 remaining discount amortization period (in years)			3 months 15 days
Debt Instrument, Convertible, Number of Equity Instruments \| shares			400,000
Debt Conversion, Original Debt, Amount			$ 497,000,000
Convertible Debt \| Subsequent Event [Member]
Financing Arrangement [Line Items]
Repayments of 0.75% Convertible Senior Notes due 2016		$ 27,000,000
Convertible Debt \| Liability Component [Member]
Financing Arrangement [Line Items]
0.75% Convertible senior notes due 2016, net (long-term)						525,000,000
Debt issuance costs						13,000,000
Convertible Debt \| Equity Component [Member]
Financing Arrangement [Line Items]
Debt issuance costs						$ 2,000,000