Goodwill and Other Assets (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$ 488.1	$ 462.7	$ 470.6
Accumulated impairment losses	(290.7)	(290.7)	(290.7)
Beginning balance	172.0	179.9
Divestiture		(1.6)
Currency translation adjustment	(17.1)	(6.3)
Goodwill acquired	42.5
Ending balance	197.4	172.0
North America Segment [Member]
Goodwill [Line Items]
Goodwill	148.2	110.3	112.1
Accumulated impairment losses	(13.2)	(13.2)	(13.2)
Beginning balance	97.1	98.9
Divestiture		(1.6)
Currency translation adjustment	(3.6)	(0.2)
Goodwill acquired	41.5
Ending balance	135.0	97.1
Asia Pacific Segment [Member]
Goodwill [Line Items]
Goodwill	37.5	40.0	41.3
Accumulated impairment losses	0.0	0.0	0.0
Beginning balance	40.0	41.3
Divestiture		0.0
Currency translation adjustment	(3.0)	(1.3)
Goodwill acquired	0.5
Ending balance	37.5	40.0
EMEA Segment [Member]
Goodwill [Line Items]
Goodwill	168.7	168.7	168.7
Accumulated impairment losses	(168.7)	(168.7)	(168.7)
Beginning balance	0.0	0.0
Divestiture		0.0
Currency translation adjustment	0.0	0.0
Goodwill acquired	0.0
Ending balance	0.0	0.0
Latin America Segment [Member]
Goodwill [Line Items]
Goodwill	133.7	143.7	148.5
Accumulated impairment losses	(108.8)	(108.8)	$ (108.8)
Beginning balance	34.9	39.7
Divestiture		0.0
Currency translation adjustment	(10.5)	(4.8)
Goodwill acquired	0.5
Ending balance	$ 24.9	$ 34.9