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Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2012
Intangible Assets [Abstract] |
Summary of Intangible Assets |
|  | Nine Months Ended September 30 |
(in millions) |  | 2012 |  |  | 2011 |
Gross cost at January 1 |  | $ | 51.2 |  |  | $ | 48.1 |
Capitalization of internally developed software and other costs |  |  | 6.4 |  |  |  | 0.0 |
Exchange effect |  |  | 0.2 |  |  |  | 0.2 |
Gross cost at September 30 |  |  | 57.8 |  |  |  | 48.3 |
Accumulated amortization at January 1 |  |  | (33.5 | ) |  |  | (29.1 | )
Amortization expense |  |  | (3.1 | ) |  |  | (3.4 | )
Exchange effect |  |  | (0.2 | ) |  |  | (0.2 | )
Accumulated amortization at September 30 |  |  | (36.8 | ) |  |  | (32.7 | )
Net book amount at September 30 |  | $ | 21.0 |  |  | $ | 15.6 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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