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Employee Retirement Plans - Narrative (Details) $ in Millions		3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 20, 2018 USD ($) element	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Defined Contribution Plan Disclosure [Line Items]
Contribution made		$ 1.7	$ 3.7
Contribution made, fixed contributions		1.7	3.4
Contribution made, profit related contributions			0.3
Expected contributions		3.9	3.9
Expected contributions, fixed contributions		$ 3.9	$ 3.9
GMSL
Defined Contribution Plan Disclosure [Line Items]
Deferred contribution	$ 12.7
Number of elements | element	3
Percent of operating profit (equal to)	10.00%
Years in arrears	2 years
Variable contribution, percent of dividends (equal to)	50.00%
GMSL | Scenario, Forecast
Defined Contribution Plan Disclosure [Line Items]
Fixed contributions				$ 3.0	$ 7.0	$ 6.8	$ 6.6

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