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Property and Equipment, net - Additional Information (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
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Lottery machinery and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Capitalized installation costs, net | $ 28,000,000 | $ 22,700,000
Gaming equipment |  |
Property, Plant and Equipment [Line Items] |  |
Capitalized installation costs, net | $ 0 | $ 0

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- Definition Capitalized Installation Costs, Net + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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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. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=sgms_GamingEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |