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.

No definition available.

+ Details

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

- Definition

The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707

+ Details

Name:	us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_ProductOrServiceAxis=sgms_InstantProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_ProductOrServiceAxis=sgms_GamingOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_GamingMachineSalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_GamingSystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_TableProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sgms_LotterySystemsGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_LotterySystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sgms_SciPlayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_MobileMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_WebAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sgms_DigitalBusinessSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_SportsAndPlatformMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=sgms_GamingAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Revenue Recognition - Summary of Revenue by Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Rental income revenue outside scope of new revenue standard	$ 62	$ 91	$ 148	$ 282
Total revenue	698	855	1,962	2,537
Instant products
Disaggregation of Revenue [Line Items]
Total revenue	157	148	425	438
Gaming(1)
Disaggregation of Revenue [Line Items]
Total revenue	231	454		1,303
Gaming(1) \| Gaming operations
Disaggregation of Revenue [Line Items]
Total revenue	92	149	227	451
Gaming(1) \| Gaming machine sales
Disaggregation of Revenue [Line Items]
Total revenue	71	168	216	452
Gaming(1) \| Gaming systems
Disaggregation of Revenue [Line Items]
Total revenue	43	77	115	218
Gaming(1) \| Table products
Disaggregation of Revenue [Line Items]
Total revenue	25	60	82	182
Lottery
Disaggregation of Revenue [Line Items]
Total revenue	241	220		678
Lottery \| Instant products
Disaggregation of Revenue [Line Items]
Total revenue	157	150	426	440
Lottery \| Lottery systems
Disaggregation of Revenue [Line Items]
Total revenue	84	70	236	238
SciPlay
Disaggregation of Revenue [Line Items]
Total revenue	151	116	435	353
SciPlay \| Mobile
Disaggregation of Revenue [Line Items]
Total revenue	132	97	377	293
SciPlay \| Web and other
Disaggregation of Revenue [Line Items]
Total revenue	19	19	58	60
Digital
Disaggregation of Revenue [Line Items]
Total revenue	75	65		203
Digital \| Sports and platform
Disaggregation of Revenue [Line Items]
Total revenue	31	29	95	85
Digital \| Gaming and other
Disaggregation of Revenue [Line Items]
Total revenue	$ 44	$ 36	$ 130	$ 118