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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract] |
Component of company's intangible assets | Goodwill and intangible assets comprise the following:
|  | December 31, 2012 |  | September 30, 2012 |  | December 31, 2011
Goodwill (not subject to amortization) |  | $ | 2,835.0 |  |  | $ | 2,818.3 |  |  | $ | 1,624.7 |
Intangible assets: |  |  |  |  |  |
Customer relationships, noncompete agreements and other |  | $ | 694.8 |  |  | $ | 691.9 |  |  | $ | 248.8 |
Trademarks and tradenames (not subject to amortization) |  | 138.4 |  |  | 137.2 |  |  | 46.4 |
Gross carrying amount |  | 833.2 |  |  | 829.1 |  |  | 295.2 |
Accumulated amortization |  | (186.4 | ) |  | (170.9 | ) |  | (135.5 | )
Intangible assets, net |  | $ | 646.8 |  |  | $ | 658.2 |  |  | $ | 159.7 |

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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=14024403&loc=d3e13816-109267 + Details
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