Restructuring Plans - Employee Termination and Restructuring Cost by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	$ 4.2	$ 5.2	$ 6.9	$ 13.4
Cumulative	47.8		47.8
Expected Total	52.8		52.8
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	2.5		4.8
Cumulative	36.0		36.0
Expected Total	41.0		41.0
Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0		0.4
Cumulative	4.7		4.7
Expected Total	4.7		4.7
Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	1.7		1.7
Cumulative	7.1		7.1
Expected Total	7.1		7.1
Business Segment
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	4.1	3.0	6.8	8.1
Business Segment | Gaming
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	3.4		5.0
Cumulative	27.8		27.8
Expected Total	30.3		30.3
Business Segment | Gaming | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	2.2		3.4
Cumulative	24.6		24.6
Expected Total	27.1		27.1
Business Segment | Gaming | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0		0.4
Cumulative	0.4		0.4
Expected Total	0.4		0.4
Business Segment | Gaming | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	1.2		1.2
Cumulative	2.8		2.8
Expected Total	2.8		2.8
Business Segment | Lottery
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.2	$ 0.0	1.3	$ 0.2
Cumulative	2.5		2.5
Expected Total	2.5		2.5
Business Segment | Lottery | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0		1.1
Cumulative	2.3		2.3
Expected Total	2.3		2.3
Business Segment | Lottery | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0		0.0
Cumulative	0.0		0.0
Expected Total	0.0		0.0
Business Segment | Lottery | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.2		0.2
Cumulative	0.2		0.2
Expected Total	0.2		0.2
Business Segment | Interactive
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.5		0.5
Cumulative	4.7		4.7
Expected Total	4.7		4.7
Business Segment | Interactive | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.2		0.2
Cumulative	2.7		2.7
Expected Total	2.7		2.7
Business Segment | Interactive | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0		0.0
Cumulative	0.0		0.0
Expected Total	0.0		0.0
Business Segment | Interactive | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.3		0.3
Cumulative	2.0		2.0
Expected Total	2.0		2.0
Unallocated corporate
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.1		0.1
Cumulative	12.8		12.8
Expected Total	15.3		15.3
Unallocated corporate | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.1		0.1
Cumulative	6.4		6.4
Expected Total	8.9		8.9
Unallocated corporate | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0		0.0
Cumulative	4.3		4.3
Expected Total	4.3		4.3
Unallocated corporate | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0		0.0
Cumulative	2.1		2.1
Expected Total	$ 2.1		$ 2.1