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Equity Investments - Northstar Illinois (Details) $ in Millions | 1 Months Ended
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Aug. 31, 2015 USD ($)
Northstar IL |
Schedule of Equity Method Investments [Line Items] |
Shortfall payment | $ 10.0

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- Definition Shortfall Payment + References No definition available. + Details
Name: | sgms_ShortfallPayment
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_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=sgms_NorthstarLotteryGroupLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |