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Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Dec. 31, 2010 | Aug. 31, 2011 Officers Restricted Stock Award Member | May 31, 2011 Non-employee director restricted stock award year | Feb. 28, 2011 Stock options | Sep. 30, 2011 Stock options year
Equity |  |  |  |  |  |  |  |  |
Issuance of common stock in connection with the exercise of stock options (in shares) |  |  | 225,746 |  |  |  |  |  |
Total proceeds from the exercise of stock options |  |  | $ 9.6 | $ 17.4 |  |  |  |  |
Share Based Compensation |  |  |  |  |  |  |  |  |
Restricted stock granted (in shares) |  |  |  |  |  | 86,000 | 16,079 |  |
Percentage of options vesting on the each anniversary (as a percent) |  |  |  |  |  | 20.00% |  |  |
Number of years from grant date that recipient is restricted from trading restricted stock (in years) |  |  |  |  |  |  | 1 |  |
Fair value on the grant date (in dollars per share) |  |  |  |  |  | $ 37.29 | $ 52.24 |  |
Stock options granted (in shares) |  |  |  |  |  |  |  | 1,037,250 |
Vesting period (in years) |  |  |  |  |  |  |  | four years |
Expiration period (in years) |  |  |  |  |  |  |  | seven years |
Fair value of stock options granted (in dollars per share) |  |  |  |  |  |  |  | $ 26.98 |
Assumptions used in the Black-Scholes option-pricing model |  |  |  |  |  |  |  |  |
Expected life (in years) |  |  |  |  |  |  |  |  | 4.8
Expected volatility rate (as a percent) |  |  |  |  |  |  |  |  | 60.20%
Dividend yield rate (as a percent) |  |  |  |  |  |  |  |  | 0.90%
Risk free interest rate (as a percent) |  |  |  |  |  |  |  |  | 2.20%
Exercise price (in dollars per share) |  |  |  |  |  |  |  |  | $ 55.73
Share Repurchase Program |  |  |  |  |  |  |  |  |
Remaining number of common stock authorized for repurchase under stock repurchase program (in shares) | 7,883,033 |  | 7,883,033 |  |  |  |  |  |
Other Comprehensive (Loss) Income |  |  |  |  |  |  |  |  |
Net income | 86.3 | 49.3 | 280.1 | 157.1 |  |  |  |  |
Other comprehensive (loss) income: |  |  |  |  |  |  |  |  |
Foreign currency translation (loss) gain | (19.8) | 5.4 | (13.4) | 4.5 |  |  |  |  |
Unrealized (loss) gain on investments, net of tax | (0.3) | 0.1 | (0.2) |  |  |  |  |  |
Total other comprehensive (loss) income | (20.1) | 5.5 | (13.6) | 4.5 |  |  |  |  |
Comprehensive income | 66.2 | 54.8 | 266.5 | 161.6 |  |  |  |  |
Comprehensive income attributable to noncontrolling interests | (1.4) | (0.6) | (4.2) | (2.2) |  |  |  |  |
Comprehensive income attributable to Reliance | 64.8 | 54.2 | 262.3 | 159.4 |  |  |  |  |
Accumulated Other Comprehensive (Loss) Income |  |  |  |  |  |  |  |  |
Foreign currency translation gain | 6.9 |  | 6.9 |  | 20.3 |  |  |  |
Unrealized loss on investments, net of tax | (0.4) |  | (0.4) |  | (0.2) |  |  |  |
Minimum pension liability, net of tax | (9.8) |  | (9.8) |  | (9.8) |  |  |  |
Total accumulated other comprehensive (loss) income | (3.3) |  | (3.3) |  | 10.3 |  |  |  |
Deferred tax assets in accumulated other comprehensive income, pension liabilities | 6.6 |  | 6.6 |  | 6.6 |  |  |  |
Deferred tax assets in accumulated other comprehensive income, unrealized loss on investments | $ 0.3 |  | $ 0.3 |  | $ 0.1 |  |  |  |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(c) -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 FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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X
- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant