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Goodwill and Other Intangible Assets - Reporting Units With Negative Carrying Values (Details) $ in Millions | Mar. 31, 2020 USD ($)
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Northeast segment | Hollywood Casino at Charles Town Races |
Goodwill [Line Items] |
Reporting unit with negative carrying amount, goodwill | $ 8.7
Northeast segment | Hollywood Casino Toledo |
Goodwill [Line Items] |
Reporting unit with negative carrying amount, goodwill | 5.8
Northeast segment | Plainridge Park Casino |
Goodwill [Line Items] |
Reporting unit with negative carrying amount, goodwill | 6.3
South segment | Boomtown New Orleans |
Goodwill [Line Items] |
Reporting unit with negative carrying amount, goodwill | 5.2
Midwest segment | Ameristar Council Bluffs |
Goodwill [Line Items] |
Reporting unit with negative carrying amount, goodwill | $ 36.2

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- Definition Amount of goodwill allocated to reporting unit with zero or negative amount of net assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=121556970&loc=SL108378252-109267 + Details
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