Hedging Activities - Derivative Instruments Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2015	Mar. 31, 2015
Derivatives Designated for Hedge Accounting \| Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	$ 94	$ 67
Fair value of derivative, liability	0	0
Derivatives Designated for Hedge Accounting \| Foreign Exchange Contract \| Prepaid Expenses and Other
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	19	14
Fair value of derivative, liability	0	0
U.S. Dollar notional amount, asset	76	76
Derivatives Designated for Hedge Accounting \| Foreign Exchange Contract \| Other Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	75	53
Fair value of derivative, liability	0	0
U.S. Dollar notional amount, asset	323	323
Derivatives not Designated for Hedge Accounting
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	25	7
Fair value of derivative, liability	10	79
Derivatives not Designated for Hedge Accounting \| Foreign Exchange Contract \| Prepaid Expenses and Other
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	25	7
Fair value of derivative, liability	0	0
U.S. Dollar notional amount, asset	1,162	493
Derivatives not Designated for Hedge Accounting \| Foreign Exchange Contract \| Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	0	0
Fair value of derivative, liability	10	79
U.S. Dollar, notional amount, liability	$ 716	$ 1,262

Nominal or face amount used to calculate payments on the derivative asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6519104

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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