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

9 Months Ended

Sep. 30, 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):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Net sales:
Aero/HS products	$	185.7	$	150.2	$	540.9	$	483.2
Automotive Extrusions	56.1		52.7		183.9		161.6
GE products	133.9		115.9		425.1		361.1
Other products	17.4		14.0		46.6		38.5
Total net sales	$	393.1	$	332.8	$	1,196.5	$	1,044.4
Timing of revenue recognition – Note 9:
Products transferred at a point in time	$	127.8	n/a		$	425.2	n/a
Products transferred over time	265.3		n/a		771.3		n/a
Total net sales	$	393.1			$	1,196.5

Schedule of income taxes paid by geographical area

Geographic information for income taxes paid for each period presented was as follows (in millions of dollars):

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Income taxes paid:
Domestic	$	0.4	$	0.3	$	1.3	$	0.7
Foreign	—		—		2.0		0.1
Total income taxes paid	$	0.4	$	0.3	$	3.3	$	0.8

Schedule of information for contractual delivery of primary aluminum supply from major suppliers

Information for delivery of our primary aluminum supply from our major suppliers for each period presented was as follows:

	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Percentage of total primary aluminum supply (lbs):
Supply from our top five major suppliers	83	%	86	%	82	%	86	%
Supply from our largest supplier	33	%	35	%	36	%	36	%
Supply from our second and third largest suppliers combined	36	%	35	%	32	%	33	%