Description of the Business and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business and Summary of Significant Accounting Policies	Description of the Business and Summary of Significant Accounting Policies Description of the Business We are a leading developer of technology-based products and services and associated content for the worldwide gaming, lottery, social and digital gaming industries. Our portfolio of revenue-generating activities primarily includes supplying gaming machines and game content, casino-management systems and table game products and services to licensed gaming entities; providing instant and draw-based lottery products, lottery systems and lottery content and services to lottery operators; providing social casino and other mobile games to retail customers; and providing a comprehensive suite of digital RMG and sports wagering solutions, distribution platforms, content, products and services. We also gain access to technologies and pursue global expansion through strategic acquisitions and equity investments. We report our results of operations in four business segments—Gaming, Lottery, SciPlay and Digital—representing our different products and services. Basis of Presentation and Principles of Consolidation The accompanying condensed consolidated financial statements have been prepared in accordance with U.S. GAAP. The accompanying condensed consolidated financial statements include the accounts of SGC, its wholly owned subsidiaries, and those subsidiaries in which we have a controlling financial interest. Investments in other entities in which we do not have a controlling financial interest but we exert significant influence are accounted for in our consolidated financial statements using the equity method of accounting. All intercompany balances and transactions have been eliminated in consolidation. In the opinion of SGC and its management, we have made all adjustments necessary to present fairly our consolidated financial position, results of operations, comprehensive loss and cash flows for the periods presented. Such adjustments are of a normal, recurring nature. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our 2020 10-K. Interim results of operations are not necessarily indicative of results of operations to be expected for a full year. Impact of COVID-19 As more fully described in the “Description of the Business and Summary of Significant Accounting Policies - Impact of COVID-19” in Note 1 of our 2020 10-K, COVID-19 disruptions continue to impact our results of operations and particularly our Gaming business segment operations. Even though the majority of gaming establishments reopened globally, gaming operations have yet to return to pre-COVID levels, as limited international travel, social distancing measures and reduced operating capacity restrictions remain in effect in many jurisdictions, and overall uncertainty regarding the magnitude and length of time that these disruptions will continue to impact our business remains unknown and may change in the future and such changes could be material. We continue to assess the situation jurisdiction by jurisdiction and actively manage our daily cash flows and continue to evaluate additional measures that will reduce operating costs and conserve cash to preserve liquidity as we execute on our strategic initiatives. As of March 31, 2021, our total available liquidity (excluding our SciPlay business segment) was $898 million, which included $203 million of undrawn availability under SGI’s revolving credit facility. In April of 2021, we made a voluntary payment of $150 million on SGI’s revolving credit facility. Significant Accounting Policies There have been no changes to our significant accounting policies described within the Notes of our 2020 10-K. Computation of Basic and Diluted Net Loss Per Share Basic and diluted net loss attributable to SGC per share were the same for all periods presented as all common stock equivalents during those periods would be anti-dilutive. We excluded 2 million and 1 million of stock options from the diluted weighted-average common shares outstanding for the three months ended March 31, 2021 and 2020, respectively. We excluded 3 million and 2 million of RSUs from the calculation of diluted weighted-average common shares outstanding for the three months ended March 31, 2021 and 2020, respectively. New Accounting Guidance - Not Yet Adopted The FASB issued ASU No. 2020-04 and subsequently ASU No. 2021-01, Reference Rate Reform (Topic 848) in March 2020 and January 2021, respectively. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships, including derivative instruments impacted by changes in the interest rates used for discounting cash flows for computing variable margin settlements, subject to meeting certain criteria, that reference LIBOR or other reference rates expected to be discontinued, in 2022 or potentially 2023 (pending possible extension). The ASUs establish certain contract modification principles that entities can apply in other areas that may be affected by reference rate reform and certain elective hedge accounting expedients and exceptions. The ASUs may be applied prospectively. We are currently assessing the impact of these standards on our consolidated financial statements. We do not expect that any other recently issued accounting guidance will have a significant effect on our consolidated financial statements.