Restructuring (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) labor_union employee	Mar. 31, 2015 USD ($)	Nov. 10, 2015
Restructuring Cost and Reserve [Line Items]
Finalization of severance agreements, number of labor unions | labor_union	3
Restructuring Reserve [Roll Forward]
Provision	$ 6.4	$ 12.1
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	29.4	43.9
Provision	3.3	7.8
Cash payments	(19.6)	(11.6)
Translation adjustment	0.9	(4.9)
Ending Balance	14.0	35.2
Employee Severance [Member] | Drivetrain [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	25.3	41.9
Provision	2.3	7.4
Cash payments	(17.3)	(10.7)
Translation adjustment	0.7	(4.7)
Ending Balance	11.0	33.9
Employee Severance [Member] | Engine [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	4.1	2.0
Provision	1.0	0.4
Cash payments	(2.3)	(0.9)
Translation adjustment	0.2	(0.2)
Ending Balance	3.0	1.3
Remy International Inc.
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	1.1
Corporate and Other [Member]
Restructuring Reserve [Roll Forward]
Provision		2.7
Gustav Wahler GmbH u. Co. KG and its general partner
Restructuring Cost and Reserve [Line Items]
Employee termination benefits	$ 1.6	0.9
Drivetrain [Member]
Restructuring Cost and Reserve [Line Items]
Employee termination costs, number of employees | employee	450
Employee termination benefits	$ 1.2	6.4
Other expense		0.9
Restructuring Reserve [Roll Forward]
Provision	$ 1.2	$ 7.3
Remy International Inc.
Restructuring Cost and Reserve [Line Items]
Equity interest acquired			100.00%