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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | Goodwill is comprised of the following:
(in millions) | Racing |  | Online Wagering |  | Casino |  | Total
Balances as of December 31, 2016 | $ | 51.7 |  |  | $ | 132.1 |  |  | $ | 117.7 |  |  | $ | 301.5 |
Additions | — |  |  | 16.1 |  |  | — |  |  | 16.1 |
Balances as of December 31, 2017 | 51.7 |  |  | 148.2 |  |  | 117.7 |  |  | 317.6 |
Additions | — |  |  | — |  |  | 20.4 |  |  | 20.4 |
Balances as of December 31, 2018 | $ | 51.7 |  |  | $ | 148.2 |  |  | $ | 138.1 |  |  | $ | 338.0 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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