Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Carrying Amount and Fair Values of the Company's Assets and Liabilities Measured on a Recurring Basis

The following table presents the carrying amount and fair values of the Company’s assets and liabilities measured on a recurring basis:

	December 31, 2021				December 31, 2020
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Non-derivatives:
Cash and cash equivalents	$	141.8	$	141.8	$	105.3	$	105.3
Derivatives (Level 1 measurement):
Other current and non-current assets:
Emissions Trading Scheme credits		3.9		3.9		—		—
Liabilities
Non-derivatives:
Finance leases (including current portion)		0.1		0.1		0.6		0.6
Derivatives (Level 1 measurement):
Other current liabilities:
Foreign currency forward exchange contracts		1.2		1.2		0.5		0.5
Non-financial liabilities (Level 3 measurement):
Stock equivalent units		17.3		17.3		17.2		17.2