Noncontrolling Interests (Changes In Redeemable Noncontrolling Interest) (Details) - USD ($) $ in Millions	6 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 219.1	$ 167.8
Net loss attributable to redeemable noncontrolling interests	(10.6)	(8.4)
Noncontrolling interests discount accretion	12.6	11.5
Adjustments to redemption value	22.2	13.4
Cash distributions	(0.1)	(2.0)
Ending balance	$ 243.2	$ 182.3

- Definition

Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

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