Business Segments - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended									6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 844.7			$ 766.3						$ 1,656.5	$ 1,491.7
AEBITDA	340.4			314.8						660.5	601.4
Reconciling items to consolidated net loss before income taxes:
Depreciation, amortization and impairments	(172.7)			(175.0)						(360.8)	(340.1)
Restructuring and other	(33.5)			(1.1)						(85.7)	(10.3)
EBITDA from equity investments	(16.5)			(13.1)						(35.3)	(29.1)
Earnings from equity investments	4.6			3.1						11.9	12.6
Interest expense	(146.1)			(151.2)						(300.9)	(310.6)
Loss on debt financing transactions	0.0			0.0						(93.2)	(29.7)
Gain on remeasurement of debt	34.5			0.0						33.4	0.0
Other income (expense), net	(0.9)			(3.1)						(6.9)	2.0
Stock-based compensation	(15.6)			(7.1)						(24.4)	(13.0)
Net income (loss) before income taxes	(5.8)			(32.7)						(201.4)	(116.8)
Assets	7,612.9	$ 7,725.3								7,612.9
Unallocated and Reconciling Items
Segment Reporting Information [Line Items]
Revenue	0.0			0.0						0.0	0.0
AEBITDA	(33.1)			(32.3)						(68.6)	(63.7)
Reconciling items to consolidated net loss before income taxes:
Depreciation, amortization and impairments	(14.6)			(21.3)						(26.5)	(45.2)
Restructuring and other	(30.3)			(1.6)						(56.5)	(5.5)
Assets	203.2	972.8								203.2
Gaming | Operating Segments
Segment Reporting Information [Line Items]
Revenue	470.7			457.2						913.7	897.2
AEBITDA	235.7			226.9						453.8	436.6
Reconciling items to consolidated net loss before income taxes:
Depreciation, amortization and impairments	(121.0)			(136.0)						(260.4)	(259.3)
Restructuring and other	(1.5)			(0.3)						(2.9)	(4.5)
Assets	5,210.7	5,401.6								5,210.7
Lottery | Operating Segments
Segment Reporting Information [Line Items]
Revenue	207.1			202.3						408.8	391.4
AEBITDA	99.4			95.6						193.5	180.9
Reconciling items to consolidated net loss before income taxes:
Depreciation, amortization and impairments	(13.9)			(13.3)						(28.1)	(27.2)
Restructuring and other	3.2			1.1						2.4	0.8
Assets	1,146.3	1,070.6								1,146.3
Social
Segment Reporting Information [Line Items]
Revenue		95.5	$ 95.1	91.1	$ 80.2	$ 74.8	$ 70.3	$ 69.1	$ 60.2
Social | Operating Segments
Segment Reporting Information [Line Items]
Revenue	99.7			91.1						197.1	171.3
AEBITDA	25.2			21.9						51.4	39.8
Reconciling items to consolidated net loss before income taxes:
Depreciation, amortization and impairments	(6.5)			(3.1)						(13.1)	(5.7)
Restructuring and other	(0.5)			(0.2)						(18.6)	(1.0)
Assets	190.5	219.1								190.5
Digital
Segment Reporting Information [Line Items]
Revenue		17.8	$ 16.3	15.7	$ 16.1	$ 16.8	$ 14.9	$ 14.3	$ 12.4
Digital | Operating Segments
Segment Reporting Information [Line Items]
Revenue	67.2			15.7						136.9	31.8
AEBITDA	13.2			2.7						30.4	7.8
Reconciling items to consolidated net loss before income taxes:
Depreciation, amortization and impairments	(16.7)			(1.3)						(32.7)	(2.7)
Restructuring and other	(4.4)			$ (0.1)						(10.1)	$ (0.1)
Assets	$ 862.2	$ 61.2								$ 862.2