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Derivative, Premium

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Derivative, Premium, Payment Period

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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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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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Millions	1 Months Ended		12 Months Ended
	Nov. 30, 2017 USD ($) Agreement	May 31, 2016 USD ($) Agreement	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on fair value of interest rate caps			$ (3.0)
Effective portion				$ 0.4	$ (0.4)
Premium payment period			33 months
Derivatives Designated as Hedging Instruments \| Interest Rate Caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate cap agreements \| Agreement	2
Derivatives Designated as Hedging Instruments \| Interest Rate Cap, maturing in 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative premium	$ 4.9
Notional amounts of the contracts			$ 600.0
Derivatives Designated as Hedging Instruments \| Interest Rate Cap, maturing in 2021 \| Other Nonoperating Income (Expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on fair value of interest rate caps			(0.6)
Gain (loss) on derivative instruments			(3.4)	1.0	(0.4)
Effective portion				0.4
Ineffective portion				0.6
Derivatives Not Designated as Hedging Instruments \| Interest Rate Caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate cap agreements \| Agreement		3
Derivative premium		$ 5.5
Derivatives Not Designated as Hedging Instruments \| Interest Rate Cap, maturing in 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amounts of the contracts			800.0
Derivatives Not Designated as Hedging Instruments \| Interest Rate Cap, maturing in 2019 \| Other Nonoperating Income (Expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) on derivative instruments			$ (0.8)	$ 5.7	$ (0.5)
LIBOR \| Derivatives Designated as Hedging Instruments \| Interest Rate Caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Basis spread on rate	2.25%
LIBOR \| Derivatives Not Designated as Hedging Instruments \| Interest Rate Caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Basis spread on rate		1.50%