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Additional Financial Information (Non-cash Investing and Financing Activities) (Details) - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Additional Financial Information [Abstract]
Issuance of common shares related to business acquisitions	$ 83.7	$ 0.0
Accrued dividends	$ 19.4	$ 0.0

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- Definition

Additional Financial Information [Abstract]

+ References

No definition available.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(15)(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Section S99
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-Section S99
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Value of stock issued pursuant to acquisitions during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

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-Topic 505
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