Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

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Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value portion of 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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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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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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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.

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Impairments and Assets Held For Sale - Additional Information (Details)	3 Months Ended							12 Months Ended
	Dec. 31, 2017 Reporting_Unit	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Property, Plant and Equipment [Abstract]
Number of reporting units \| Reporting_Unit	8
Segment Reporting Information [Line Items]
Goodwill impairments		$ 69,000,000	$ 0	$ 0	$ 0			$ 0	$ 69,000,000	$ 1,002,600,000
Income tax benefit								$ (14,500,000)	125,000,000	299,900,000
Assets held for sale		6,500,000							6,500,000
Minimum
Segment Reporting Information [Line Items]
Finite-lived intangible asset useful life								2 years
Maximum
Segment Reporting Information [Line Items]
Finite-lived intangible asset useful life								16 years
Lottery systems
Segment Reporting Information [Line Items]
Goodwill impairments		69,000,000				$ 67,600,000
Income tax benefit		$ 14,500,000				$ 24,900,000
Terminal revenue growth rate		2.00%				2.00%
Discount rate		8.00%				8.00%
Goodwill, fair value		$ 22,900,000							22,900,000
Gaming
Segment Reporting Information [Line Items]
Goodwill impairments									$ 0	935,000,000
Income tax benefit										$ 0
Terminal revenue growth rate							2.00%
Discount rate							9.00%