Retirement Benefit Plans - Benefit Obligation and Plan Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in plan assets:
Funded status of plan		$ (166.6)	$ (156.8)
Amounts recognized in Balance Sheet [Abstract]
Non-current liabilities		(312.9)	(326.6)
NSK Warner [Member]
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net amount	[1]	7.1	5.6
U.S. Plans:
Change in benefit obligation [Roll Forward]
Projected benefit obligation, January 1		306.2	293.6
Interest cost		11.2	12.1	$ 11.6
Settlement and curtailment		(48.1)
Settlements, curtailments and other		25.7	3.1
Actuarial (gain) loss		(12.1)	34.0
Acquisition		68.1
Benefits paid		(24.6)	(33.5)
Projected benefit obligation, December 31		300.7	306.2	293.6
Change in plan assets:
Fair value of plan assets, January 1		265.6	274.1
Actual return on plan assets		(0.6)	25.0
Defined Benefit Plan, Settlements, Plan Assets		(48.1)
Acquisition		43.5
Fair value of plan assets, December 31		235.8	265.6	274.1
Funded status of plan		(64.9)	(40.6)
Amounts recognized in Balance Sheet [Abstract]
Non-current assets		0.0	0.0
Current liabilities		(0.3)	(0.1)
Non-current liabilities		(64.6)	(40.5)
Net amount		(64.9)	(40.6)
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net actuarial loss		125.4	151.6
Net prior service (credit) cost		(8.2)	(9.0)
Net amount	[1]	117.2	142.6
Defined Benefit Plan, Accumulated Benefit Obligation		300.7	306.2
Non-U.S. Plans:
Change in benefit obligation [Roll Forward]
Projected benefit obligation, January 1		527.8	482.7
Service cost		14.9	12.8	12.4
Interest cost		14.1	18.1	16.6
Plan participants’ contributions		0.3	0.4
Settlement and curtailment		(4.7)
Settlements, curtailments and other		(0.8)	0.7	0.2
Actuarial (gain) loss		(9.0)	82.0
Currency translation		(42.9)	(53.5)
Acquisition		23.9
Other			3.2
Benefits paid		(15.9)	(17.9)
Projected benefit obligation, December 31		508.5	527.8	482.7
Change in plan assets:
Fair value of plan assets, January 1		395.6	345.0
Actual return on plan assets		10.3	52.0
Employer contribution		19.3	53.4
Defined Benefit Plan, Settlements, Plan Assets		(2.5)
Currency translation		(30.8)	(37.0)
Acquisition		18.8
Other			(0.3)
Fair value of plan assets, December 31		395.1	395.6	345.0
Funded status of plan		(113.4)	(132.2)
Amounts recognized in Balance Sheet [Abstract]
Non-current assets		9.4	4.1
Current liabilities		(3.0)	(2.6)
Non-current liabilities		(119.8)	(133.7)
Net amount		(113.4)	(132.2)
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net actuarial loss		144.2	160.4
Net prior service (credit) cost		0.7	0.9
Net amount	[1]	144.9	161.3
Defined Benefit Plan, Accumulated Benefit Obligation		486.2	507.7
U.S. other postretirement benefit plans [Member]
Change in benefit obligation [Roll Forward]
Projected benefit obligation, January 1		169.7	177.5
Service cost		0.2	0.3	0.4
Interest cost		5.7	6.7	6.8
Actuarial (gain) loss		(16.8)	15.0
Acquisition		1.7
Benefits paid		(15.2)	(29.8)
Projected benefit obligation, December 31		145.3	169.7	$ 177.5
Change in plan assets:
Funded status of plan		(145.3)	(169.7)
Amounts recognized in Balance Sheet [Abstract]
Non-current assets		0.0	0.0
Current liabilities		(16.8)	(17.3)
Non-current liabilities		(128.5)	(152.4)
Net amount		(145.3)	(169.7)
Amounts recognized in accumulated other comprehensive Income Loss) [Abstract]
Net actuarial loss		36.5	56.4
Net prior service (credit) cost		(24.0)	(29.7)
Net amount	[1]	$ 12.5	$ 26.7

[1] AOCI shown above does not include our equity investee, NSK-Warner. NSK-Warner had an AOCI loss of $7.1 million and $5.6 million at December 31, 2015 and 2014, respectively.