Goodwill and Other Intangibles - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Changes in the carrying amount of goodwill
Net goodwill balance, January 1	$ 1,205.7
Ending balance, December 31	$ 1,757.7		$ 1,205.7
Goodwill impairment test, weighted average cost of capital discount rate for future cash flow	10.00%
Sensitivity analysis Increase in discount rate	1.00%
Sensitivity analysis decrease in operating margin assumption	1.00%
Engine [Member]
Changes in the carrying amount of goodwill
Gross goodwill balance, January 1	$ 1,362.0		1,331.9
Accumulated impairment losses, January 1			(501.8)	$ (501.8)
Net goodwill balance, January 1	860.2		830.1
Acquisitions	11.6	[1]	76.9
Translation adjustment and other	(35.4)		(46.8)
Ending balance, December 31	836.4		860.2
Drivetrain [Member]
Changes in the carrying amount of goodwill
Gross goodwill balance, January 1	345.7		367.1
Accumulated impairment losses, January 1			(0.2)	$ (0.2)
Net goodwill balance, January 1	345.5		366.9
Acquisitions	584.7		0.0
Translation adjustment and other	(8.9)		(21.4)
Ending balance, December 31	$ 921.3		$ 345.5

[1] *Acquisitions relate to the Company's 2015 purchases of Remy and BERU Diesel and the 2014 purchase of Gustav Wahler GmbH u. Co. KG and its general partner.