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Additional Financial Information (Non-cash Investing and Financing Activities) (Details) - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Additional Financial Information [Abstract]
Common shares related to business acquisitions	$ 28.1	$ 83.7
Accrued dividends	$ 0.0	$ 19.4

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- Definition

Additional Financial Information [Abstract]

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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.

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Value of stock issued pursuant to acquisitions during the period.

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