Hedging Activities - Derivative Instruments Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2016	Mar. 31, 2016
Derivatives Designated for Hedge Accounting \| Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	$ 112	$ 62
Fair value of derivative, liability	0	8
Derivatives Designated for Hedge Accounting \| Foreign Exchange Contract \| Prepaid Expenses and Other
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	16	16
Fair value of derivative, liability	0	0
U.S. Dollar notional amount, asset	80	80
Derivatives Designated for Hedge Accounting \| Foreign Exchange Contract \| Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	47	46
Fair value of derivative, liability	0	0
U.S. Dollar notional amount, asset	243	243
Derivatives Designated for Hedge Accounting \| Cross Currency Swap \| Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	49
Fair value of derivative, liability	0
U.S. Dollar notional amount, asset	901
Derivatives Designated for Hedge Accounting \| Cross Currency Swap \| Other Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset		0
Fair value of derivative, liability		8
U.S. Dollar notional amount, asset		546
Derivatives not Designated for Hedge Accounting
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	6	23
Fair value of derivative, liability	0	0
Derivatives not Designated for Hedge Accounting \| Foreign Exchange Contract \| Prepaid Expenses and Other
Derivatives, Fair Value [Line Items]
Fair value of derivative, asset	6	23
Fair value of derivative, liability	0	0
U.S. Dollar notional amount, asset	139	680
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	0	0
U.S. Dollar, notional amount, liability	$ 9	$ 196

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=64837297&loc=SL5579245-113959

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Nominal or face amount used to calculate payments on the derivative liability.

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