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Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Information

Schedule of sales, by products or services

	2017		2016		2015
Carbon steel	52	%	52	%	52	%
Aluminum	19	%	20	%	19	%
Stainless steel	14	%	14	%	14	%
Alloy	6	%	5	%	7	%
Toll processing and logistics	4	%	4	%	3	%
Other	5	%	5	%	5	%
Total	100	%	100	%	100	%

Summary of the Company's operations by geographic location based on where sales originated from

	United States			Foreign Countries			Total
	(in millions)
Year Ended December 31, 2017
Net sales	$	8,847.3		$	873.7		$	9,721.0
Long-lived assets		4,353.7			346.0			4,699.7
Year Ended December 31, 2016
Net sales		7,867.3			746.1			8,613.4
Long-lived assets		4,385.2			337.6			4,722.8
Year Ended December 31, 2015
Net sales		8,617.7			732.8			9,350.5
Long-lived assets		4,211.5			355.9			4,567.4

X

- Definition

Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9031-108599

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- Definition

Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

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