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Shareholders' Equity (Narrative) (Details) (USD $) In Millions, except Share data | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Feb. 28, 2006 | Oct. 31, 2005 | Oct. 31, 2002 | Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010
Shareholders' Equity [Abstract] |  |  |  |  |  |  |
Stock repurchase program, authorized amount | $ 200 | $ 100 | $ 100 |  |  |  |
Total stock repurchase authorization |  |  |  | 400 |  | 400 |
Shares repurchased under authorized repurchase programs |  |  |  | 9,688,900 |  | 9,688,900 |
Stock repurchases, shares |  |  |  | 0 | 0 | 0 | 0
Value of shares repurchased under authorized repurchase programs |  |  |  | 297.7 |  | 297.7 |
Remaining value of stock repurchase programs authorization |  |  |  |  |  | 102.3 |
Value of shares repurchased from employees, separate from other authorizations |  |  |  |  |  | $ 2.0 | $ 3.1

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- Definition Shares repurchased under authorized repurchase programs + Details
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- Definition Value of stock repurchased from employees + Details
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- Definition Total stock repurchase authorization + Details
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- Definition Value of shares repurchased under authorized repurchase programs + Details
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- Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 1 -Section B -Paragraph 11A -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. + Details
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- Definition The amount authorized by an entity's Board of Directors under a stock repurchase plan. + Details
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- Definition The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan. + Details
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