XML 62 R49.htm IDEA: XBRL DOCUMENT v3.3.1.900

Joint Ventures and Noncontrolling Interests (Details) $ in Millions		12 Months Ended
	Oct. 01, 2014 USD ($)	Dec. 31, 2015 item	Dec. 15, 2015	Sep. 11, 2015	Nov. 03, 2014
Joint Ventures and Noncontrolling Interests
Number of joint ventures in which the entity has a noncontrolling interest | item		2
Valex Corp. | South Korea
Joint Ventures and Noncontrolling Interests
Ownership percentage in investments other than equity method investment		95.00%
Indiana Pickling & Processing Company
Joint Ventures and Noncontrolling Interests
Ownership percentage in investments other than equity method investment		56.00%
Feralloy Processing Company
Joint Ventures and Noncontrolling Interests
Ownership percentage in investments other than equity method investment		51.00%
FP Structural Solutions
Joint Ventures and Noncontrolling Interests
Ownership percentage in investments other than equity method investment		70.00%
Eagle Steel Products, Inc.
Joint Ventures and Noncontrolling Interests
Ownership percentage in equity method investment		45.00%
Acero Prime S. de R.L. de C.V.
Joint Ventures and Noncontrolling Interests
Ownership percentage in equity method investment		60.00%			40.00%
Gain on equity interest	$ 11.4
Total purchase price	57.6
Noncontrolling interest	$ 22.6
Ownership percentage in investments other than equity method investment		60.00%
Oregon Feralloy Partners LLC
Joint Ventures and Noncontrolling Interests
Ownership percentage in equity method investment		40.00%
Minimum
Joint Ventures and Noncontrolling Interests
Ownership percentage in equity method investment		20.00%
Percentage of ownership for consolidation of financial statements		50.00%
Minimum | Valex Corp.
Joint Ventures and Noncontrolling Interests
Ownership percentage in consolidated subsidiary			97.00%
Minimum | Valex Corp. | People's Republic of China
Joint Ventures and Noncontrolling Interests
Ownership percentage in consolidated subsidiary				92.00%
Maximum
Joint Ventures and Noncontrolling Interests
Ownership percentage in equity method investment		50.00%
Maximum | Valex Corp.
Joint Ventures and Noncontrolling Interests
Ownership percentage in consolidated subsidiary		100.00%
Maximum | Valex Corp. | People's Republic of China
Joint Ventures and Noncontrolling Interests
Ownership percentage in consolidated subsidiary		100.00%

X

- Definition

The percentage of ownership of common stock or equity participation in the consolidated subsidiary.

+ References

No definition available.

+ Details

Name:	rs_ConsolidatedSubsidiaryInvestmentOwnershipPercentage
Namespace Prefix:	rs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	rs_EquityMethodInvestmentAndMinorityInterestLineItems
Namespace Prefix:	rs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of joint ventures in which the entity has a noncontrolling interest.

+ References

No definition available.

+ Details

Name:	rs_NumberOfJointVentureInterestsInWhichEntityHasNoncontrollingInterest
Namespace Prefix:	rs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of ownership in another entity's common stock, held directly or indirectly by the parent, for consolidation of financial statements.

+ References

No definition available.

+ Details

Name:	rs_OwnershipPercentageByParentForConsolidation
Namespace Prefix:	rs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of assets acquired at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=rs_ValexCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_KR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rs_IndianaPicklingAndProcessingCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rs_FeralloyProcessingCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rs_FPStructuralSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rs_EagleSteelProductsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=rs_AceroPrimeSDeRLDeCVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=rs_OregonFeralloyPartnersLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_CN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: