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Stock-Based Compensation Outstanding Options and SSARs (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2011 years | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |  |  |
Beginning balance | 7,580,000 |  | 6,611,000 | 5,437,000 |
Incentive shares granted | 834,000 |  | 1,160,000 | 1,912,000 |
Options / SSARs exercised | (18,000) |  | (83,000) | 0 |
Options / SSARs cancelled | (81,000) |  | (108,000) | (738,000) |
Ending balance | 8,315,000 |  | 7,580,000 | 6,611,000 |
Options / SSARs outstanding Weighted Average Exercise Price | $ 12.78 |  | $ 13.10 | $ 13.99 | $ 18.79
SSARs granted Weighted Average Exercise Price | $ 10.06 |  | $ 7.05 | $ 2.21 |
Options / SSARs exercised Weighted Average Exercise Price | $ 4.93 |  | $ 2.17 | $ 0.00 |
Options / SSARs cancelled Weighted Average Exercise Price | $ 15.88 |  | $ 11.36 | $ 18.82 |
Options / SSARs outstanding Weighted Average Contractual Term (in years) | 6.3 |  |  |  |
Options / SSARs outstanding Aggregate Intrinsic Value (in millions) | $ 11.8 |  |  |  |
Vested and expected to vest | 7,899,000 | [1] |  |  |
Vested and expected to vest Aggregate Intrinsic Value (in millions) | 11.2 | [1] |  |  |
Options / SSARs exercisable | 6,138,000 |  |  |  |
Options / SSARs exercisable Weighted Average Exercise Price | $ 14.90 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term | 5.6 |  |  |  |
Options / SSARs exercisable Aggregate Intrinsic Value (in millions) | 7.4 |  |  |  |
Options and SSARs [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |  |  |
Weighted-average period of years costs are expected to be recognied over | 1.2 |  |  |  |
Compensation expense related to award | 3.9 |  | 4.9 | 5.2 |
Unrecognized compensation costs | 3.6 |  |  |  |
Shares available under stock award plans | 4,682,280 |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |  |  |
Incentive shares granted | 336,816 |  | 400,907 | 459,072 |
Weighted-average period of years costs are expected to be recognied over | 1.1 |  |  |  |
Compensation expense related to award | 2.3 |  | 1.9 | 0.6 |
Unrecognized compensation costs | $ 2.7 |  |  |  |
[1] | Options or SSARS expected to vest based upon historical forfeiture rate

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- Definition Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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