Restructuring Plans - Employee Termination and Restructuring Cost by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	$ 2.7	$ 8.2
Cumulative	43.6
Expected Total	51.6
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	2.3
Cumulative	33.5
Expected Total	39.5
Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.4
Cumulative	4.7
Expected Total	6.7
Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	5.4
Expected Total	5.4
Business Segment
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	2.7	5.1
Business Segment | Gaming
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	1.6
Cumulative	24.4
Expected Total	27.4
Business Segment | Gaming | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	1.2
Cumulative	22.4
Expected Total	24.4
Business Segment | Gaming | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.4
Cumulative	0.4
Expected Total	1.4
Business Segment | Gaming | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	1.6
Expected Total	1.6
Business Segment | Lottery
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	1.1	$ 0.2
Cumulative	2.3
Expected Total	5.3
Business Segment | Lottery | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	1.1
Cumulative	2.3
Expected Total	4.3
Business Segment | Lottery | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	0.0
Expected Total	1.0
Business Segment | Lottery | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	0.0
Expected Total	0.0
Business Segment | Interactive
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	4.2
Expected Total	4.2
Business Segment | Interactive | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	2.5
Expected Total	2.5
Business Segment | Interactive | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	0.0
Expected Total	0.0
Business Segment | Interactive | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	1.7
Expected Total	1.7
Unallocated corporate
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	12.7
Expected Total	14.7
Unallocated corporate | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	6.3
Expected Total	8.3
Unallocated corporate | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	4.3
Expected Total	4.3
Unallocated corporate | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	0.0
Cumulative	2.1
Expected Total	$ 2.1