Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Ringmaster S.r.l.
Related Party Transaction [Line Items]
Investment, equity method	$ 0.6	$ 0.5
Ringmaster S.r.l. \| Joint venture
Related Party Transaction [Line Items]
Equity method ownership interest (as a percent)	50.00%
Yeonama Holdings Co. Limited
Related Party Transaction [Line Items]
Investment, accounted for at cost	$ 20.3	20.9
Yeonama Holdings Co. Limited \| Entity with common director or management figure
Related Party Transaction [Line Items]
Ownership interest accounted for at fair value (as a percent)	30.00%
CLS-GTECH Company Limited \| Joint venture
Related Party Transaction [Line Items]
Equity method ownership interest (as a percent)	50.00%
Connect Ventures One LP \| Entity with common director or management figure
Related Party Transaction [Line Items]
Amount of investment	$ 4.2	4.7
Connect Ventures Two LP \| Entity with common director or management figure
Related Party Transaction [Line Items]
Amount of investment	$ 1.7	$ 0.5
OPAP S.A. \| Entity with common director or management figure
Related Party Transaction [Line Items]
Ownership interest held by related party investee (as a percent)	33.00%

The percentage of ownership interest or equity participation in the related party.

No definition available.

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- Definition

Percentage of ownership interest or equity participation in the counterparty held by a fund of which the related party is a shareholder.

+ References

No definition available.

+ Details

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- Definition

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

+ References

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 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

+ References

+ Details

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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

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- Details

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