Debt - Summary of Carrying Amounts and Estimated Fair Values of Long-Term Borrowings (Details) - USD ($) $ in Millions		Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term borrowings		$ 223.6	$ 210.0
Current portion of long-term borrowings and finance lease obligations		0.6	0.2
Notional Amount
Debt Instrument [Line Items]
Long-term borrowings	[1]	223.6	210.0
Fair Value
Debt Instrument [Line Items]
Long-term borrowings	[1]	$ 223.6	$ 210.0

[1] Long-term borrowings includes current finance lease obligations of $0.6 million and $0.2 million as of June 30, 2021 and December 31, 2020, respectively.