Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2018

Revenue From Contract With Customer [Abstract]

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

The following table disaggregates our net sales by place of manufacture (point of origin) and to the location of the customer (point of destination), which are the categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors (as required by ASC 606).

	Three months ended						Nine months ended
	September 30,						September 30,
	2017			2018			2017			2018
	(In millions)
Net sales - point of origin:
Germany	$	256.6		$	211.9		$	672.1		$	704.1
United States		209.3			234.5			623.6			640.2
Canada		70.4			82.3			228.2			236.1
Belgium		75.6			66.4			205.7			205.0
Norway		58.2			49.8			156.8			159.4
Eliminations		(205.6	)		(234.6	)		(610.7	)		(632.3	)
Total	$	464.5		$	410.3		$	1,275.7		$	1,312.5
Net sales - point of destination:
Europe	$	246.0		$	191.8		$	652.3		$	664.2
North America		131.4			142.0			393.5			412.6
Other		87.1			76.5			229.9			235.7
Total	$	464.5		$	410.3		$	1,275.7		$	1,312.5