Debt - Debt Issuance Costs (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 25, 2018	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Capitalized deferred debt issuance costs			$ 3.6
Write off of deferred debt issuance costs	$ 0.5
Deferred debt issuance costs		$ 5.9	7.2
Expected Future Amortization Expense [Abstract]
2020		1.2
2021		1.2
2022		1.2
2023		1.0
2024		0.4
Thereafter		0.9
Total		5.9	7.2
Interest expense
Debt Instrument [Line Items]
Amortization expense		$ 1.2	$ 1.7