Fair Value - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash flow hedge gain (loss) to be reclassified within 12 months	$ (2.2)
Gain (loss) on derivative	$ (0.5)	$ 0.3
Measurement Input, Long-term Revenue Growth Rate | Valuation Technique, Option Pricing Model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivative liability, unobservable inputs	0.07		0.07
Measurement Input, Price Volatility | Valuation Technique, Option Pricing Model
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivative liability, unobservable inputs	0.20		0.20
Not designated as hedging instrument | Natural gas forward contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on derivative	$ 0.2	(0.6)
Gain on the settlement of contracts	$ 0.7	$ 1.0