Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Definite-Lived Intangible Assets, Gross Carrying Amount	$ 31.3	$ 32.1
Definite-Lived Intangible Assets, Accumulated Amortization	(13.7)	(14.1)
Definite-Lived Intangible Assets, Net Carrying Amount	17.6	18.0
Indefinite-lived Intangible Assets, Net Carrying Amount	338.2	246.0
Total intangible assets	355.8	$ 264.0
Contractual Rights [Member] \| Online Wagering
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Net Carrying Amount	8.0
Contractual Rights [Member] \| Presque Isle Downs & Casino [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Net Carrying Amount	56.0
Contractual Rights [Member] \| Presque Isle Downs & Casino [Member] \| Online Wagering
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets, Net Carrying Amount	$ 10.0

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
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-Section 50
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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