Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2022

Revenue From Contract With Customer [Abstract]

Disaggregation of Net Sales by Place of Manufacture and to Location of Customer

	Three months ended				Nine months ended
	September 30,				September 30,
	2021		2022		2021		2022
	(In millions)
Net sales - point of origin:
United States	$	297.6	$	330.3	$	787.5	$	980.4
Germany		254.2		213.5		724.2		762.0
Canada		88.6		105.1		288.8		313.1
Belgium		69.6		76.0		212.0		256.3
Norway		63.4		64.7		198.5		211.1
Eliminations		(273.6)		(330.0)		(767.6)		(935.1)
Total	$	499.8	$	459.6	$	1,443.4	$	1,587.8
Net sales - point of destination:
Europe	$	248.0	$	197.5	$	712.1	$	731.6
North America		174.3		182.5		476.9		558.4
Other		77.5		79.6		254.4		297.8
Total	$	499.8	$	459.6	$	1,443.4	$	1,587.8