Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Nov. 10, 2015	Jan. 29, 2015
Restructuring expense	$ 19.2	$ 19.9	$ 25.6	$ 32.0
Merger and acquisition expense	7.2	0.0	13.0	0.0
Gain on previously held equity interest			0.0	(10.8)
Other income	(1.4)	(0.8)	(1.9)	(0.9)
Other expense, net	25.0	19.1	36.7	20.3
Remy International Inc.
Equity interest acquired					100.00%
BERU Diesel Start Systems Pvt. Ltd.
Gain on previously held equity interest	$ 0.0	$ 0.0	$ 0.0	$ (10.8)
Equity interest acquired						51.00%