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Debt (Gain (Loss) on Extinguishment of Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	$ 57.4	$ (28.2)	$ 0.0
Term Loan A
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	(1.3)	0.0
Senior Notes
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	58.7	(24.7)
Revolving Credit Facility and Term Loan A
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	0.0	(1.7)
Revolving Credit Facility
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	0.0	(1.1)
Term Loan B and Other
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	$ 0.0	$ (0.7)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126972273&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126972273&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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