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Derivative Instruments and Hedging Activities (Derivatives by Balance Sheet Location) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Mar. 31, 2020
Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 0.2	$ 0.6
Designated as Hedging Instrument | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	0.2	0.9
Designated as Hedging Instrument | Other Non-Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	195.9	187.9
Designated as Hedging Instrument | Forward exchange contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset	0.2	0.6
Designated as Hedging Instrument | Forward exchange contracts | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	0.2	0.5
Designated as Hedging Instrument | Forward exchange contracts | Other Non-Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	0.0	0.0
Designated as Hedging Instrument | Interest rate swaps | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset	0.0	0.0
Designated as Hedging Instrument | Interest rate swaps | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	0.0	0.0
Designated as Hedging Instrument | Interest rate swaps | Other Non-Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	56.1	187.9
Not Designated as Hedging Instrument | Forward exchange contracts | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset		0.0
Not Designated as Hedging Instrument | Forward exchange contracts | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability		0.4
Not Designated as Hedging Instrument | Forward exchange contracts | Other Non-Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability		$ 0.0
Not Designated as Hedging Instrument | Interest rate swaps | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset	0.0
Not Designated as Hedging Instrument | Interest rate swaps | Accounts Payable and Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	0.0
Not Designated as Hedging Instrument | Interest rate swaps | Other Non-Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	139.8
Not Designated as Hedging Instrument | Interest rate swaps, financing element
Derivatives, Fair Value [Line Items]
Financing Element of Certain Hybrid Instruments	$ 144.2

X

- Definition

Carrying value as of the balance sheet date of hybrid instruments.

+ References

No definition available.

+ Details

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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X

- 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.

+ Details

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