Stockholders' Deficit (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total SGC stockholders' deficit	$ (2,653)		$ (2,108)
Vesting of RSUs, net of tax withholdings and other	(13)		(1)
Stock-based compensation	17		9
Net loss	(9)		(155)
Less: comprehensive income attributable to noncontrolling interest	6		4
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	8		$ (97)
Accounting Standards Update [Extensible List]			us-gaap:AccountingStandardsUpdate201905Member
Common Stock, Value, Outstanding	1			$ 1
Additional Paid in Capital, Common Stock	1,272			1,268
Retained Earnings (Accumulated Deficit)	(3,544)			(3,529)
Treasury Stock, Value	175			175
Accumulated Other Comprehensive Income (Loss), Net of Tax	(210)			(218)
Stockholders' Equity Attributable to Noncontrolling Interest	135			129
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(2,521)			(2,524)
Total SGC stockholders' deficit	(2,656)		$ (2,358)
Share-based compensation expense	23		10
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 58
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	2 years
Cumulative Effect, Period of Adoption, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			(6)
Related to SGC stock options
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	$ 6		1
Related to SGC RSUs(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	15		9
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total SGC stockholders' deficit			1
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				1
Total SGC stockholders' deficit			1
Additional Paid in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total SGC stockholders' deficit			1,208
Vesting of RSUs, net of tax withholdings and other	(13)		(1)
Stock-based compensation	17		9
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				1,268
Total SGC stockholders' deficit			1,216
Accumulated Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total SGC stockholders' deficit			(2,954)
Net loss			(159)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				(3,529)
Total SGC stockholders' deficit			(3,119)
Accumulated Loss | Cumulative Effect, Period of Adoption, Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			(6)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total SGC stockholders' deficit			(175)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				(175)
Total SGC stockholders' deficit			(175)
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total SGC stockholders' deficit			(292)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	8	$ 8	(97)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				(218)
Total SGC stockholders' deficit			(389)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Noncontrolling Interest			108		$ 104
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				$ 129
SciPlay | Related to SGC RSUs(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	$ 2		$ 0