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Period Type:	instant

Annuity investments purchased to fund the liability for future jackpot payments, expected to be realized or consumed after one year or the normal operating cycle, if longer.

No definition available.

Name:	igt_JackpotInvestmentsNoncurrent
Namespace Prefix:	igt_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

License fee amortization period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	igt_LicenseFeeAmortizationPeriod
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Data Type:	xbrli:durationItemType
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Period Type:	duration

Amount of asset related to consideration paid in advance for royalties that provide economic benefits after one year or the normal operating cycle, if longer.

No definition available.

Name:	igt_PrepaidRoyaltiesNoncurrent
Namespace Prefix:	igt_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date more than one year from the balance sheet date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Period Type:	instant

Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

No definition available.

Name:	us-gaap_OtherAssetsMiscellaneousNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- References

No definition available.

Name:	us-gaap_OtherAssetsNoncurrentAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed after one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 17
-Article 5

Name:	us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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Name:	us-gaap_ProductOrServiceAxis=igt_ScratchAndWinConcessionsMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_ProductOrServiceAxis=igt_NorthstarNewJerseyLotteryMember
Namespace Prefix:
Data Type:	na
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