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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill | The following table shows the change in goodwill and other intangible assets:
|  | Three Months Ended March 31,
Millions |  | 2016 |  | 2015
|  | Goodwill |  | Other intangible assets |  | Goodwill |  | Other intangible assets
Beginning balance |  | $ | 187.9 |  |  | $ | 187.8 |  |  | $ | 168.9 |  |  | $ | 182.3 |
Acquisitions of businesses |  | — |  |  | — |  |  | .3 |  |  | 2.8 |
Acquisitions of intangible assets |  | — |  |  | 3.9 |  |  | — |  |  | — |
Amortization, including foreign currency translation |  | — |  |  | (8.1 | ) |  | — |  |  | (6.9 | )
Ending balance |  | $ | 187.9 |  |  | $ | 183.6 |  |  | $ | 169.2 |  |  | $ | 178.2 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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