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Debt (Details 2) (USD $) |  |  | 1 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  |  | 1 Months Ended | 12 Months Ended | 1 Months Ended |  |  | 1 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Jul. 31, 2011 Unsecured revolving credit facility item Y | Dec. 31, 2012 Unsecured revolving credit facility | Dec. 31, 2011 Unsecured revolving credit facility | Jul. 26, 2011 Unsecured revolving credit facility | Dec. 31, 2012 Unsecured revolving credit facility LIBOR | Dec. 31, 2012 Unsecured revolving credit facility Bank prime rate | Dec. 31, 2012 Senior unsecured notes due July 2, 2013 | Dec. 31, 2011 Senior unsecured notes due July 2, 2013 | Nov. 30, 2006 Senior Unsecured Notes - Publicly Traded item | Dec. 31, 2012 Senior Unsecured Notes - Publicly Traded | Nov. 30, 2006 Senior unsecured notes due November 15, 2016 | Dec. 31, 2012 Senior unsecured notes due November 15, 2016 | Dec. 31, 2011 Senior unsecured notes due November 15, 2016 | Nov. 30, 2006 Senior unsecured notes due November 15, 2036 | Dec. 31, 2012 Senior unsecured notes due November 15, 2036 | Dec. 31, 2011 Senior unsecured notes due November 15, 2036 | Dec. 31, 2012 Revolving Credit Facilities - Foreign Operations | Dec. 31, 2011 Revolving Credit Facilities - Foreign Operations | Dec. 31, 2012 Unsecured Revolving Credit Facility and Senior Unsecured Notes | Dec. 31, 2012 Unsecured Revolving Credit Facility and Senior Unsecured Notes Minimum | Dec. 31, 2012 Unsecured Revolving Credit Facility and Senior Unsecured Notes Maximum
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing capacity under revolving credit facility |  |  |  | $ 1,500,000,000 |  | $ 1,100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,800,000 |  |  |  |
Period of extended term of existing syndicated credit agreement (in years) |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of banks as lenders |  |  | 26 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate |  |  |  |  |  |  | LIBOR | Bank prime rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate added to base (as a percent) |  |  |  |  |  |  | 1.25% | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee on unused portion of revolving credit facility (as a percent) |  |  |  | 0.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average fixed rate (as a percent) |  |  |  | 1.46% | 1.78% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed rate (as a percent) |  |  |  |  |  |  |  |  | 5.35% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  | 31,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional amount of letters of credit available to be issued |  |  |  | 218,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Combined outstanding balances of revolving credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,300,000 | 11,800,000 |  |  |
Issuance of debt |  |  |  |  |  |  |  |  |  |  | 600,000,000 |  | 350,000,000 |  |  | 250,000,000 |  |  |  |  |  |  |
Issuance of debt | 1,208,900,000 | 1,332,800,000 |  |  |  |  |  |  | 75,000,000 | 75,000,000 |  |  |  | 350,000,000 | 350,000,000 |  | 250,000,000 | 250,000,000 |  |  |  |  |
Number of tranches comprising the debt issuance |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.20% |  |  | 6.85% |  |  |  |  |  |
Percentage of principal amount at which the notes may be required to be repurchased in event of a change of control and a downgrade of the entity's credit rating |  |  |  |  |  |  |  |  |  |  |  | 101.00% |  |  |  |  |  |  |  |  |  |  |
Interest coverage ratio, actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11.3 |  |
Minimum interest coverage ratio required, debt covenant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.0 |
Leverage ratio, actual (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.80% |  |
Maximum leverage ratio required under financial covenant (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00%
Minimum net worth requirement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,190,000,000 |
Reliance shareholders' equity | 3,558,400,000 | 3,143,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,560,000,000 |  |
Ownership interest in domestic subsidiaries (as a percent) | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of consolidated EBITDA required for the entity and subsidiary guarantors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80.00% |
Minimum percentage of consolidated tangible assets required for the entity and subsidiary guarantors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80.00% |
Actual percentage of total consolidated EBITDA for the parent and subsidiary guarantors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90.00% |  |
Actual percentage of consolidated tangible assets owned by the entity and subsidiary guarantors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89.00% |  |
Aggregate maturities of long-term debt for each of the next five years and thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2013 | 83,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 875,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total | $ 1,208,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=6228006&loc=d3e74512-122707 + Details
Name: | us-gaap_StockholdersEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant