Business and Geographic Segments - Net Property and Equipment by Segment (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net property and equipment:
Net property and equipment	$ 523.8	$ 563.6	$ 590.4
United States
Net property and equipment:
Net property and equipment	45.8	63.6	67.8
Germany
Net property and equipment:
Net property and equipment	204.7	214.8	237.5
Canada
Net property and equipment:
Net property and equipment	88.3	91.1	88.6
Norway
Net property and equipment:
Net property and equipment	83.6	86.4	88.1
Belgium
Net property and equipment:
Net property and equipment	$ 101.4	$ 107.7	$ 108.4