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Derivatives - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2021 USD ($) instrument	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) segment	Feb. 12, 2021 USD ($)	Jan. 31, 2021 USD ($)	Dec. 31, 2020 GBP (£) segment	Nov. 19, 2020 USD ($)	Nov. 19, 2020 GBP (£)	Mar. 26, 2020 USD ($) instrument	Mar. 26, 2020 GBP (£) instrument	Jan. 09, 2020 USD ($)	Nov. 30, 2019 GBP (£) instrument £ / $
Derivative [Line Items]
Liabilities	$ 106,800,000		$ 88,700,000
Accumulated other comprehensive loss	(2,200,000)		(18,600,000)
Interest expense	52,600,000	$ 72,000,000.0
Cash flow hedge losses expected to be reclassified as an increase to interest expense over the next twelve months	24,000,000.0
Derivatives designated as hedging instruments
Derivative [Line Items]
Liabilities	90,800,000		87,000,000.0
Interest rate swaps
Derivative [Line Items]
Liabilities	103,800,000		87,000,000.0
Derivative, notional amount	$ 1,350,000,000.0		2,400,000,000.0	$ 900,000,000.0
Accumulated other comprehensive loss					$ 51,600,000
Derivative, fixed interest rate				2.382%
Interest rate swaps | LIBOR
Derivative [Line Items]
Variable interest rate				0.75%
Interest rate swaps | Cash Flow Hedging | Derivatives designated as hedging instruments
Derivative [Line Items]
Liabilities											$ 39,900,000
Foreign Currency Net Zero Cost Collar Contract - Entered In November 2019
Derivative [Line Items]
Derivative, notional amount | £												£ 100,000,000
Number of derivative instruments | instrument												2
Number of derivative instruments settled | instrument									1	1
Notional amount settled | £								£ 50,000,000		£ 50,000,000
Net payment (receipt) after settlement							$ 200,000		$ (1,900,000)
Foreign Currency Net Zero Cost Collar Contract - Entered In November 2019 | Minimum
Derivative [Line Items]
Forward exchange rate | £ / $												1.2375
Foreign Currency Net Zero Cost Collar Contract - Entered In November 2019 | Maximum
Derivative [Line Items]
Forward exchange rate | £ / $												1.3475
Foreign Currency Forward Contract - Entered in March 2020
Derivative [Line Items]
Derivative, notional amount			$ 0
Derivative term of contract			3 months
Foreign Currency Forward Contract - Entered in June 2020
Derivative [Line Items]
Derivative, notional amount			$ 107,100,000			£ 80,000,000
Number of derivative instruments | segment			2			2
Forward exchange rate			1.3388			1.3388
Receive Fixed Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount				$ 900,000,000.0
Number of derivative instruments | instrument	2
Pay-Fixed Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount				$ 1,350,000,000

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Derivative, Net Payment (Proceeds) After Settlement

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Fixed interest rate related to the interest rate derivative.

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Contractual rate at which a foreign currency can be purchased or sold.

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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.

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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.

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Nominal or face amount used to calculate payment on derivative.

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The number of derivative instruments of a particular group held by the entity.

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Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Amount of the cost of borrowed funds accounted for as interest expense.

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