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Financial Instruments (Details Textual 1) - USD ($) $ in Millions	Jun. 30, 2018	Mar. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Non-current investments	$ 69.5	$ 86.2
Bank Time Deposits [Member]
Debt Securities, Available-for-sale [Line Items]
Short-term Investments	1,334.0	480.2
Non-current investments	69.5	86.2
Commercial Paper [Member]
Debt Securities, Available-for-sale [Line Items]
Short-term Investments	$ 153.6	$ 219.2

X

- Definition

Amount of long-term investments classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

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Amount of short-term investments classified as other.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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-Topic 210
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