Revenue Recognition

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue RecognitionThe following table disaggregates revenues by type within each of our business segments:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Gaming
Gaming operations	$	92	$	149	$	227	$	451
Gaming machine sales	71		168		216		452
Gaming systems	43		77		115		218
Table products	25		60		82		182
Total	$	231	$	454	$	640	$	1,303

Lottery
Instant products	$	157	$	150	$	426	$	440
Lottery systems	84		70		236		238
Total	$	241	$	220	$	662	$	678

SciPlay
Mobile	$	132	$	97	$	377	$	293
Web and other	19		19		58		60
Total	$	151	$	116	$	435	$	353

Digital
Sports and platform	$	31	$	29	$	95	$	85
Gaming and other	44		36		130		118
Total	$	75	$	65	$	225	$	203

The amount of rental income revenue that is outside the scope of ASC 606 was $62 million and $148 million for the three and nine months ended September 30, 2020, respectively, and $91 million and $282 million for the three and nine months ended September 30, 2019, respectively.

Contract Liabilities and Other Disclosures

The following table summarizes the activity in our contract liabilities for the reporting period:


	Nine Months Ended September 30,
	2020
Contract liability balance, beginning of period(1)	$	109
Liabilities recognized during the period	52
Amounts recognized in revenue from beginning balance	(61)
Contract liability balance, end of period(1)	$	100
(1) Contract liabilities are included within Accrued liabilities and Other long-term liabilities in our consolidated balance sheets.

The timing of revenue recognition, billings and cash collections results in billed receivables, unbilled receivables (contract assets), and customer advances and deposits (contract liabilities) on our consolidated balance sheets. Other than contracts with customers with financing arrangements exceeding 12 months, revenue recognition is generally proximal to conversion to cash, except for Lottery instant products sold under percentage of retail sales contracts. Revenue is recognized for such contracts upon delivery to our customers, while conversion to cash is based on the retail sale of the underlying ticket to end consumers. As a result, revenue recognition under ASC 606 does not approximate conversion to cash for such contracts in any periods post-adoption. Total revenue recognized under such contracts for the three and nine months ended September 30, 2020 was $26 million and $66 million, respectively, and $20 million and $69 million for the three and nine months ended September 30, 2019, respectively. The following table summarizes our balances in these accounts for the periods indicated (other than contract liabilities disclosed above):


	Receivables		Contract Assets(1)
Beginning of period balance(2)	$	808	$	121
End of period balance, September 30, 2020	686		128


(1) Contract assets are included primarily within Prepaid expenses, deposits and other current assets in our consolidated balance sheets.
(2) The beginning of period balance excludes the impact of adoption of ASC 326.

As of September 30, 2020, we did not have material unsatisfied performance obligations for contracts expected to be long-term or contracts for which we recognize revenue at an amount other than for which we have the right to invoice for goods or services delivered or performed.