Goodwill and Other Intangibles - Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross	$ 289.4		$ 290.6
Amortized intangible assets, accumulated amortization	156.7		150.8		129.1
Amortized intangible assets, net	132.7		139.8
Other intangible assets	151.1		169.5
Amortized intangible assets, future amortization expense [Abstract]
Future Amortization Expense - 2015	17.8
Future Amortization Expense - 2016	17.7
Future Amortization Expense - 2017	16.4
Future Amortization Expense - 2018	14.9
Future Amortization Expense - 2019	14.7
Intangible assets (excluding goodwill), gross [Roll Forward]
Beginning balance, January 1	320.3		335.4
Acquisition	42.7	[1]			0
Impairment	(10.3)	[1]	(26.4)	[1]
Divestitures			(1.1)
Translation adjustment	(44.9)		12.4
Ending balance, December 31	307.8		320.3		335.4
Intangible assets, accumulated amortization [Roll Forward]
Beginning balance, January 1	150.8		129.1
Amortization	27.2		26.7		28.4
Impairment	0	[2]	(13.9)	[2]
Divestitures			(0.4)
Translation adjustment	(21.3)		9.3
Ending balance, December 31	156.7		150.8		129.1
Patented and unpatented technology [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross	89.3		85.9
Amortized intangible assets, accumulated amortization	39.1		36.5
Amortized intangible assets, net	50.2		49.4
Intangible assets, accumulated amortization [Roll Forward]
Ending balance, December 31	39.1		36.5
Customer relationships
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross	194.3		201.8
Amortized intangible assets, accumulated amortization	115.1		111.4
Amortized intangible assets, net	79.2		90.4
Intangible assets, accumulated amortization [Roll Forward]
Ending balance, December 31	115.1		111.4
Miscellaneous amortizable assets
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortized intangible assets, gross	5.8		2.9
Amortized intangible assets, accumulated amortization	2.5		2.9
Amortized intangible assets, net	3.3
Intangible assets, accumulated amortization [Roll Forward]
Ending balance, December 31	2.5		2.9
In-process research and development
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Indefinite-lived intangible assets (excluding goodwill)	10.8		10.8
Unamortized trade names
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Unamortized trade names	$ 7.6		$ 18.9
Minimum [Member]
Amortized intangible assets, future amortization expense [Abstract]
Amortized intangible assets, useful life	3 years
Maximum [Member]
Amortized intangible assets, future amortization expense [Abstract]
Amortized intangible assets, useful life	15 years

[1] *Acquisition relates to the Company's 2014 purchase of Gustav Wahler GmbH u. Co. KG and its general partner.** Impairment relates to Engine unamortized trade names for 2014 and Drivetrain customer relationships and an Engine unamortized trade name for 2013. The impairment charges are recorded in Other expense, net.

[2] *Impairment relates to Drivetrain customer relationships. The impairment charge is recorded in Other expense, net.