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Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014
Forward Contracts [Member] | Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | $ 399invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | $ 463invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | 1,755invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 1,091invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Gain (loss) on derivatives | (189)us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeByNatureAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember |
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount |  | $ 96invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateSwapMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Minimum [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Foreign currency derivatives, maturity date | Mar. 31, 2016 |
Minimum [Member] | Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Foreign currency derivatives, maturity date | Apr. 01, 2015 |
Maximum [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Foreign currency derivatives, maturity date | Mar. 31, 2020 |
Maximum [Member] | Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Foreign currency derivatives, maturity date | Feb. 04, 2016 |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition Date the foreign currency exchange rate derivatives mature or expire, in CCYY-MM-DD format. + References No definition available. + Details
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- Details
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