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Description of the Business and Summary of Significant Accounting Policies - New Accounting Guidance (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Gaming |  |  |
Segment Reporting Information [Line Items] |  |  |
WAP Jackpot expense | $ 29.8 | $ 38.1 | $ 26.7

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- Definition Wide-Area Progressive Jackpot Expenses + References No definition available. + Details
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Namespace Prefix: | sgms_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sgms_GamingGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |