Business, Product and Geographical Area Information and Concentration of Risk (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Schedule of net sales by end market segment applications

Net sales by end market applications and by timing of control transfer for each period presented were as follows (in millions of dollars):

	Year Ended December 31,
	2018		2017		2016
Net sales:
Aero/HS products	$	739.4	$	653.7	$	675.4
Automotive Extrusions	239.3		217.3		188.8
GE products	546.0		476.2		420.1
Other products	61.2		50.3		46.3
Total net sales	$	1,585.9	$	1,397.5	$	1,330.6
Timing of revenue recognition – Note 11:
Products transferred at a point in time	$	543.0	n/a		n/a
Products transferred over time	1,042.9		n/a		n/a
Total net sales	$	1,585.9

Schedule of net sales, income taxes paid, and long-lived assets, by geographical area

Geographic information for net sales based on country of origin, income taxes paid and long-lived assets were as follows (in millions of dollars):

	Year Ended December 31,
	2018		2017		2016
Net sales to unaffiliated customers:
Domestic	$	1,509.6	$	1,337.3	$	1,278.6
Foreign1	76.3		60.2		52.0
Total net sales	$	1,585.9	$	1,397.5	$	1,330.6
Income taxes paid:
Domestic	$	1.6	$	1.2	$	0.7
Foreign	2.0		0.1		0.5
Total income taxes paid	$	3.6	$	1.3	$	1.2

	December 31,
	2018		2017		2016
Long-lived assets:2
Domestic	$	581.7	$	541.2	$	499.5
Foreign1	30.1		30.2		31.4
Total long-lived assets	$	611.8	$	571.4	$	530.9

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^1.  Foreign reflects our London, Ontario production facility.

^2.  Long-lived assets represent Property, plant and equipment, net.

Schedules of Concentration of Risk, by Risk Factor

Information about export sales and primary aluminum supply from our major suppliers were as follows for the periods presented:

	Year Ended December 31,
	2018		2017		2016
Percentage of Net sales:
Export sales	15	%	18	%	19	%
Percentage of total annual primary aluminum supply (lbs):
Supply from our top five major suppliers	81	%	85	%	84	%
Supply from our largest supplier	22	%	36	%	32	%
Supply from our second and third largest suppliers combined	38	%	33	%	32	%