Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Summary of Revenues by Type

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Gaming
Gaming operations	$	159.2	$	176.0	$	480.5	$	526.8
Gaming machine sales	167.2		163.1		479.6		482.6
Gaming systems	69.7		62.0		229.0		190.6
Table products	51.8		53.5		172.5		151.8
Total	$	447.9	$	454.6	$	1,361.6	$	1,351.8
Lottery
Instant products	$	142.0	$	142.7	$	442.3	$	435.7
Lottery systems	64.8		60.2		173.3		158.6
Total	$	206.8	$	202.9	$	615.6	$	594.3
Social
Social gaming	$	105.1	$	95.1	$	302.2	$	266.4
Digital
Sports and platform	$	20.8	$	—	$	67.2	$	—
Gaming and other	40.4		16.3		130.9		48.1
Total	$	61.2	$	16.3	$	198.1	$	48.1

Summary of Contract Liabilities

The following table summarizes our opening and closing balances in these accounts (other than contract liabilities disclosed above):

	Receivables		Contract Assets(1)
Opening balance, January 1, 2018	$	724.7	$	66.4
Closing balance, September 30, 2018	691.3		109.1
(1) Contract assets are included primarily within Prepaid expenses, deposits and other current assets in our September 30, 2018 consolidated balance sheet.

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

	Nine Months Ended September 30,
	2018
Contract liability balance, beginning of period(1)	$	88.2
Liabilities recognized during the period	54.5
Amounts recognized in revenue from beginning balance	(55.9		)
Contract liability balance, end of period(1)	$	86.8
(1) Contract liabilities are included within accrued liabilities and other long-term liabilities in our consolidated balance sheet.