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Shareholders' Equity (Details) (USD $) In Millions, except Share data | 3 Months Ended | 9 Months Ended |  | 1 Months Ended | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  | 1 Months Ended
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Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Dec. 31, 2010 | Aug. 31, 2007 Authorized in 2007 [Member] | Sep. 30, 2011 Authorized in 2007 [Member] | Aug. 27, 2007 Authorized in 2007 [Member] | Sep. 30, 2011 Authorized in 2010 [Member] | Dec. 13, 2010 Authorized in 2010 [Member] | Sep. 30, 2011 Authorized in 2011 [Member] | Nov. 03, 2011 Authorized in 2011 [Member] | Nov. 30, 2011 Dividend Declared [Member]
Components of Comprehensive Income (Loss), net of tax [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings | $ 79.6 | $ 51.3 | $ 188.0 | $ 86.8 |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation gain (loss) | (93.6) | 112.2 | (24.6) | (14.5) |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on investments | (1.1) | 1.7 | (0.7) | 1.1 |  |  |  |  |  |  |  |  |
Defined benefit pension plans | 0.3 | 0.5 | 1.4 | 1.0 |  |  |  |  |  |  |  |  |
Retiree health care plan | 0 | 0 | 0 | (0.1) |  |  |  |  |  |  |  |  |
Comprehensive income (loss) | (14.8) | 165.7 | 164.1 | 74.3 |  |  |  |  |  |  |  |  |
Components of Accumulated Other Comprehensive Income (Loss), net of tax [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation gain (loss) | 72.0 |  | 72.0 |  | 96.6 |  |  |  |  |  |  |  |
Unrealized gain (loss) on investments | 7.3 |  | 7.3 |  | 8.0 |  |  |  |  |  |  |  |
Defined benefit pension plans | (17.7) |  | (17.7) |  | (19.1) |  |  |  |  |  |  |  |
Retiree health care plan | 1.5 |  | 1.5 |  | 1.5 |  |  |  |  |  |  |  |
Accumulated other comprehensive income (loss) | 63.1 |  | 63.1 |  | 87.0 |  |  |  |  |  |  |  |
Share Repurchase Programs [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized to be repurchased (in shares) |  |  |  |  |  |  |  | 5,000,000 |  | 3,000,000 |  | 3,000,000 |
Authorized amount |  |  |  |  |  | $ 400.0 |  |  |  |  |  |  |
Shares repurchased (in shares) |  |  | 923,200 |  |  |  | 236,790 |  | 686,410 |  | 0 |  |
Remaining number of shares authorized to be repurchased |  |  |  |  |  |  | 0 |  | 2,300,000 |  | 3,000,000 |  |
Dividend declaration date |  |  | May 03, 2011 |  |  |  |  |  |  |  |  |  |
Dividend paid (in dollars per share) |  |  | $ 0.40 |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event date |  |  |  |  |  |  |  |  |  |  |  |  | Nov. 03, 2011
Amount (dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.40

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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: 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 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration