Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jan. 29, 2015
Restructuring expense	$ 9.3	$ 13.1	$ 41.3	$ 67.6
Merger and acquisition expense	3.9		3.9
Gain on previously held equity interest			(10.8)
Other income	(0.1)	(3.5)	(1.0)	(8.2)
Other expense, net	13.1	12.3	33.4	62.1
United States Pension Plan of US Entity [Member]
Settlement	0.0	2.7	0.0	2.7
Remy International Inc
Merger and acquisition expense		0.0		0.0
BERU Diesel Start Systems Pvt. Ltd.
Gain on previously held equity interest	$ 0.0	$ 0.0	$ (10.8)	$ 0.0
Equity interest acquired					51.00%