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Debt (Loss on Extinguishment of Debt) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Extinguishment of Debt [Line Items]
Loss on extinguishment of debt	$ 0.4	$ 0.0	$ 27.1	$ 0.0
Revolving Credit Facility, Term Loan A and Senior Notes
Extinguishment of Debt [Line Items]
Loss on extinguishment of debt			26.4
Recorded as a Reduction of Outstanding Debt Balances & Amortized Over Life of New Issuances			62.1
Total			88.5
Revolving Credit Facility, Term Loan A and Senior Notes | New Debt Issuance Costs and Call Premiums
Extinguishment of Debt [Line Items]
Loss on extinguishment of debt			21.2
Recorded as a Reduction of Outstanding Debt Balances & Amortized Over Life of New Issuances			31.0
Total			52.2
Revolving Credit Facility, Term Loan A and Senior Notes | Previously Incurred Debt Issuance Costs
Extinguishment of Debt [Line Items]
Loss on extinguishment of debt			5.2
Recorded as a Reduction of Outstanding Debt Balances & Amortized Over Life of New Issuances			31.1
Total			36.3
Term Loan B
Extinguishment of Debt [Line Items]
Loss on extinguishment of debt	$ 0.0		0.2
Term Loan B and Other
Extinguishment of Debt [Line Items]
Loss on extinguishment of debt			$ 0.7

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- Definition

Debt Instrument, Debt Issuance and Redemption Costs, Total

+ References

No definition available.

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+ References

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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 http://asc.fasb.org/extlink&oid=123467658&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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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 http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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