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Goodwill And Indefinite-Lived Intangible Assets Impairment Test (Tables) | 9 Months Ended
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Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] |
(in millions) | Racing |  | Casinos |  | TwinSpires |  | Big Fish Games |  | Total
Balances as of December 31, 2016 | $ | 51.7 |  |  | $ | 117.6 |  |  | $ | 132.1 |  |  | $ | 530.8 |  |  | $ | 832.2 |
Additions | — |  |  | — |  |  | 16.1 |  |  | — |  |  | 16.1 |
Balances as of September 30, 2017 | $ | 51.7 |  |  | $ | 117.6 |  |  | $ | 148.2 |  |  | $ | 530.8 |  |  | $ | 848.3 |
Schedule of Indefinite and Finite Lived Assets |
| September 30, 2017 |  | December 31, 2016
(in millions) | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Definite-lived intangible assets | $ | 180.4 |  |  | $ | (113.3 | ) |  | $ | 67.1 |  |  | $ | 187.4 |  |  | $ | (100.0 | ) |  | $ | 87.4 |
Indefinite-lived intangible assets |  |  |  |  | 358.3 |  |  |  |  |  |  | 358.3 |
Total |  |  |  |  |  |  | $ | 425.4 |  |  |  |  |  |  | $ | 445.7 |
In 2017, we reduced our customer relationships intangible asset and accumulated amortization for TwinSpires by $15.1 million as the amounts were fully amortized. Finally, we established definite-lived intangible assets of $8.1 million related to the BetAmerica acquisition.

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- Definition Schedule of Indefinite and Finite Lived Assets [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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