Decrease in Percentage of Fair Value in Excess of Carrying Amount That Could Result in an Impairment of Goodwill

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Number of Reporting Units

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of transfers of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized among segments.

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Intangible Assets and Goodwill - Goodwill (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013 Segment	Dec. 31, 2014 Segment Reporting_Unit	Dec. 31, 2013 Reporting_Unit	Oct. 18, 2013
Goodwill
Balance at the beginning of the period	$ 801.4us-gaap_Goodwill	$ 1,183.1us-gaap_Goodwill	$ 801.4us-gaap_Goodwill
Acquisitions		2,956.1us-gaap_GoodwillAcquiredDuringPeriod	385.6us-gaap_GoodwillAcquiredDuringPeriod
Foreign currency adjustments		(30.9)us-gaap_GoodwillTranslationAdjustments	5.3us-gaap_GoodwillTranslationAdjustments
Write off of goodwill			(5.4)us-gaap_GoodwillImpairmentLoss
Reallocation of Goodwill			0us-gaap_GoodwillTransfers
Balance at the end of the period		4,108.3us-gaap_Goodwill	1,183.1us-gaap_Goodwill
Number of operating segments	7us-gaap_NumberOfOperatingSegments	3us-gaap_NumberOfOperatingSegments
Number of reporting units		8sgms_NumberofReportingUnits	6sgms_NumberofReportingUnits
WMS Acquisition
Goodwill
Balance at the beginning of the period				381.8
Write off of goodwill		(3.8)
Balance at the end of the period				381.8
Exit provoloto instant game operations in Mexico
Goodwill
Write off of goodwill			(5.4)
Gaming
Goodwill
Balance at the beginning of the period	262.7	612.7	262.7
Acquisitions		2,902.8	361.1
Foreign currency adjustments		(15.8)	5.0
Write off of goodwill			0
Reallocation of Goodwill			(11.6)
Balance at the end of the period		3,499.7	612.7
Gaming \| United States
Goodwill
Decrease in percentage of fair value in excess of carrying amount that could result in an impairment		16.00%
Gaming \| U.K
Goodwill
Decrease in percentage of fair value in excess of carrying amount that could result in an impairment		10.00%
Gaming \| WMS Acquisition
Goodwill
Balance at the beginning of the period				381.8
Balance at the end of the period				381.8
Lottery
Goodwill
Balance at the beginning of the period	538.7	513.9	538.7
Acquisitions		0	0
Foreign currency adjustments		(15.1)	0.3
Write off of goodwill			(5.4)
Reallocation of Goodwill			(19.7)
Balance at the end of the period		498.8	513.9
Interactive
Goodwill
Balance at the beginning of the period	0	56.5	0
Acquisitions		53.3	24.5
Foreign currency adjustments		0	0
Write off of goodwill			0
Reallocation of Goodwill			31.3
Balance at the end of the period		109.8	56.5
Reported Balance
Goodwill
Balance at the end of the period			1,186.9
Reported Balance \| Gaming
Goodwill
Balance at the end of the period			617.2
Reported Balance \| Lottery
Goodwill
Balance at the end of the period			513.9
Reported Balance \| Interactive
Goodwill
Balance at the end of the period			55.8
Adjustment
Goodwill
Balance at the end of the period			(3.8)
Adjustment \| Gaming
Goodwill
Balance at the end of the period			(4.5)
Adjustment \| Lottery
Goodwill
Balance at the end of the period			0
Adjustment \| Interactive
Goodwill
Balance at the end of the period			$ 0.7