Retirement Benefit Plans - Benefit Obligation and Plan Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Amounts recognized in Balance Sheet [Abstract]
Non-current liabilities	$ (312.9)		$ (509.7)
NSK Warner [Member]
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net amount recognized	4.9	[1]	7.9	[1]
U.S. Plans:
Change in benefit obligation [Roll Forward]
Projected benefit obligation, January 1	330.1		337.4
Interest cost	11.6		14.3		16.1
Actuarial (gain) loss	(18.7)		15.5
Benefits paid	(29.4)		(37.1)
Projected benefit obligation, December 31	293.6		330.1		337.4
Change in plan assets:
Fair value of plan assets, January 1	282.7		290.4
Actual return on plan assets	20.8		29.4
Fair value of plan assets, December 31	274.1		282.7		290.4
Funded status of plan	(19.5)		(47.4)
Amounts recognized in Balance Sheet [Abstract]
Current liabilities	(0.1)		(0.1)
Non-current liabilities	(19.4)		(47.3)
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(19.5)		(47.4)
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net actuarial loss	115.0		163.8
Net prior service cost (credit)	9.7		(10.5)
Net amount recognized	124.7	[1]	153.3	[1]
Defined Benefit Plan, Accumulated Benefit Obligation	293.6		330.1
Non-U.S. Plans:
Change in benefit obligation [Roll Forward]
Projected benefit obligation, January 1	447.6		344.3
Service cost	12.4		9.1		9.1
Interest cost	16.6		17.2		17.8
Plan participants’ contributions	0.4		0.5
Plan amendments	0.6
Actuarial (gain) loss	11.8		84.1
Currency translation	10.6		11.3
Other	(2.7)		(4.5)
Benefits paid	(14.6)		(14.4)
Projected benefit obligation, December 31	482.7		447.6		344.3
Change in plan assets:
Fair value of plan assets, January 1	177.9		154.9
Actual return on plan assets	23.6		15.0
Employer contribution	150.4		18.0
Currency translation	7.7		6.0
Other	(0.4)		(2.1)
Fair value of plan assets, December 31	345.0		177.9		154.9
Funded status of plan	(137.7)		(269.7)
Amounts recognized in Balance Sheet [Abstract]
Current liabilities	(2.6)		(7.0)
Non-current liabilities	(135.1)		(262.7)
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(137.7)		(269.7)
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net actuarial loss	130.6		135.1
Net prior service cost (credit)	1.1		0.5
Net amount recognized	131.7	[1]	135.6	[1]
Defined Benefit Plan, Accumulated Benefit Obligation	464.8		430.2
U.S. other postretirement benefit plans [Member]
Change in benefit obligation [Roll Forward]
Projected benefit obligation, January 1	220.5		251.0
Service cost	0.4		0.5		0.7
Interest cost	6.8		10.1		11.8
Plan amendments			(0.3)
Actuarial (gain) loss	(29.7)		(20.7)
Benefits paid	(20.5)		(20.1)
Projected benefit obligation, December 31	177.5		220.5		251.0
Change in plan assets:
Funded status of plan	(177.5)		(220.5)
Amounts recognized in Balance Sheet [Abstract]
Current liabilities	(19.1)		(20.8)
Non-current liabilities	(158.4)		(199.7)
Pension and Other Postretirement Defined Benefit Plans, Liabilities	(177.5)		(220.5)
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net actuarial loss	44.0		78.7
Net prior service cost (credit)	(36.1)		(42.6)
Net amount recognized	$ 7.9	[1]	$ 36.1	[1]

[1] AOCI shown above does not include our equity investee, NSK-Warner. NSK-Warner had an AOCI loss of $4.9 million and $7.9 million at December 31, 2013 and 2012, respectively.