Employee Termination and Restructuring Plans - By Segment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	$ 18.3	$ 1.9	$ 4.9	$ 5.6	$ 22.4	$ 0	$ 0	$ 0.3	$ 0.8	$ 1.8	$ 5.7	$ 2.3	$ 30.7	$ 22.7	$ 10.6
Cumulative													53.4
Expected total													56.4
Goodwill impairment														5.4
Exit provoloto instant game operations in Mexico
Restructuring Cost and Reserve [Line Items]
Restructuring, accelerated depreciation expense					3.1									3.1
Goodwill impairment														5.4
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring	13.6				17.1								25.8
Cumulative													36.9
Expected total													39.9
Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													0.9
Cumulative													4.0
Expected total													4.0
Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													4.0
Cumulative													12.5
Expected total													12.5
Restructuring, accelerated depreciation expense													4.6
Operating Segments
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													26.1	13.7	10.6
Un-allocated corporate
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													4.6
Cumulative													13.6
Expected total													13.6
Un-allocated corporate | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													4.4
Cumulative													11.3
Expected total													11.3
Un-allocated corporate | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													0.2
Cumulative													2.3
Expected total													2.3
Un-allocated corporate | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													0
Cumulative													0
Expected total													0
Gaming
Restructuring Cost and Reserve [Line Items]
Number of immaterial business lines with exit costs													2
Restructuring, accelerated depreciation expense													3.8	8.0
Goodwill impairment														0
Gaming | Exit provoloto instant game operations in Mexico
Restructuring Cost and Reserve [Line Items]
Restructuring, accelerated depreciation expense														3.1
Gaming | Operating Segments
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													15.5	6.7	4.7
Gaming | Operating Segments
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													15.5
Cumulative													22.1
Expected total													25.1
Gaming | Operating Segments | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													14.9
Cumulative													18.3
Expected total													21.3
Gaming | Operating Segments | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													(0.1)
Cumulative													0.9
Expected total													0.9
Gaming | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													0.7
Cumulative													2.9
Expected total													2.9
Lottery
Restructuring Cost and Reserve [Line Items]
Goodwill impairment														5.4
Other restructuring costs														1.4
Reversal of acquisition related earn-out liability														2.1
Lottery | Operating Segments
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													3.5	5.1	5.9
Cumulative													8.6
Expected total													8.6
Lottery | Operating Segments | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													3.1
Cumulative													3.5
Expected total													3.5
Lottery | Operating Segments | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													0.4
Cumulative													0.4
Expected total													0.4
Lottery | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													0
Cumulative													4.7
Expected total													4.7
Interactive
Restructuring Cost and Reserve [Line Items]
Goodwill impairment														0
Interactive | Operating Segments
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													7.1	1.9	0
Cumulative													9.1
Expected total													9.1
Interactive | Operating Segments | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													3.4
Cumulative													3.8
Expected total													3.8
Interactive | Operating Segments | Property Costs
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													0.4
Cumulative													0.4
Expected total													0.4
Interactive | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Employee termination and restructuring													3.3
Cumulative													4.9
Expected total													$ 4.9