Business and Geographic Segments - Net Property and Equipment by Segment (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net property and equipment:
Net property and equipment	$ 563.6	$ 590.4	$ 563.0
U.S.
Net property and equipment:
Net property and equipment	63.6	67.8	72.0
Germany
Net property and equipment:
Net property and equipment	214.8	237.5	233.6
Canada
Net property and equipment:
Net property and equipment	91.1	88.6	73.1
Norway
Net property and equipment:
Net property and equipment	86.4	88.1	87.9
Belgium
Net property and equipment:
Net property and equipment	$ 107.7	$ 108.4	$ 96.4