Retirement Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Expense for defined contribution and defined benefit pension plans and other post employment defined benefit plans [Text Block]

	Year Ended December 31,
(millions of dollars)	2015		2014		2013
Defined contribution expense	$	28.0	$	27.6	$	24.9
Defined benefit pension expense	35.5		18.6		24.3
Other postretirement employee benefit expense	3.3		3.3		5.7
Total	$	66.8	$	49.5	$	54.9

Reconciliation of the plans' benefit obligations, plan assets, funded status and recognition [Text Block]

	Pension benefits												Other postretirement
	Year Ended December 31,												employee benefits
	2015						2014						Year Ended December 31,
(millions of dollars)	US			Non-US			US			Non-US			2015			2014
Change in projected benefit obligation:
Projected benefit obligation, January 1	$	306.2		$	527.8		$	293.6		$	482.7		$	169.7		$	177.5
Service cost	—			14.9			—			12.8			0.2			0.3
Interest cost	11.2			14.1			12.1			18.1			5.7			6.7
Plan participants’ contributions	—			0.3			—			0.4			—			—
Settlement and curtailment	(48.1		)	(4.7		)	—			—			—			—
Actuarial (gain) loss	(12.1		)	(9.0		)	34.0			82.0			(16.8		)	15.0
Currency translation	—			(42.9		)	—			(53.5		)	—			—
Acquisition	68.1			23.9			—			—			1.7			—
Other	—			—			—			3.2			—			—
Benefits paid	(24.6		)	(15.9		)	(33.5		)	(17.9		)	(15.2		)	(29.8		)
Projected benefit obligation, December 31	$	300.7		$	508.5		$	306.2		$	527.8		$	145.3		$	169.7
Change in plan assets:
Fair value of plan assets, January 1	$	265.6		$	395.6		$	274.1		$	345.0
Actual return on plan assets	(0.6		)	10.3			25.0			52.0
Employer contribution	—			19.3			—			53.4
Plan participants’ contribution	—			0.3			—			0.4
Settlements	(48.1		)	(2.5		)	—			—
Currency translation	—			(30.8		)	—			(37.0		)
Acquisition	43.5			18.8			—			—
Other	—			—			—			(0.3		)
Benefits paid	(24.6		)	(15.9		)	(33.5		)	(17.9		)
Fair value of plan assets, December 31	$	235.8		$	395.1		$	265.6		$	395.6
Funded status	$	(64.9	)	$	(113.4	)	$	(40.6	)	$	(132.2	)	$	(145.3	)	$	(169.7	)
Amounts in the Consolidated Balance Sheets consist of:
Non-current assets	$	—		$	9.4		$	—		$	4.1		$	—		$	—
Current liabilities	(0.3		)	(3.0		)	(0.1		)	(2.6		)	(16.8		)	(17.3		)
Non-current liabilities	(64.6		)	(119.8		)	(40.5		)	(133.7		)	(128.5		)	(152.4		)
Net amount	$	(64.9	)	$	(113.4	)	$	(40.6	)	$	(132.2	)	$	(145.3	)	$	(169.7	)
Amounts in accumulated other comprehensive loss consist of:
Net actuarial loss	$	125.4		$	144.2		$	151.6		$	160.4		$	36.5		$	56.4
Net prior service (credit) cost	(8.2		)	0.7			(9.0		)	0.9			(24.0		)	(29.7		)
Net amount*	$	117.2		$	144.9		$	142.6		$	161.3		$	12.5		$	26.7
Total accumulated benefit obligation for all plans	$	300.7		$	486.2		$	306.2		$	507.7

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* 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.

Funded status of pension plans with accumulated benefit obligations in excess of plan assets [Text Block]

	December 31,
(millions of dollars)	2015			2014
Accumulated benefit obligation	$	(597.6	)	$	(615.2	)
Plan assets	431.0			458.4
Deficiency	$	(166.6	)	$	(156.8	)
Pension deficiency by country:
United States	$	(64.9	)	$	(40.6	)
Germany	(64.3		)	(76.5		)
Other	(37.4		)	(39.7		)
Total pension deficiency	$	(166.6	)	$	(156.8	)

Weighted average asset allocations of funded pensions plans and target allocations [Text Block]

	December 31,				Target Allocation
	2015		2014
U.S. Plans:
Real estate and other	12	%	10	%	0% - 14%
Fixed income securities	53	%	55	%	44% - 64%
Equity securities	35	%	35	%	27% - 47%
	100	%	100	%
Non-U.S. Plans:
Real estate and other	5	%	3	%	0% - 7%
Fixed income securities	46	%	47	%	43% - 53%
Equity securities	49	%	50	%	45% - 55%
	100	%	100	%

Components of net periodic benefit cost [Text Block]

	Pension benefits																		Other postretirement employee benefits
	Year Ended December 31,
	2015						2014						2013						Year Ended December 31,
(millions of dollars)	US			Non-US			US			Non-US			US			Non-US			2015			2014			2013
Service cost	$	—		$	14.9		$	—		$	12.8		$	—		$	12.4		$	0.2		$	0.3		$	0.4
Interest cost	11.2			14.1			12.1			18.1			11.6			16.6			5.7			6.7			6.8
Expected return on plan assets	(17.0		)	(24.8		)	(17.6		)	(21.1		)	(18.2		)	(11.0		)	—			—			—
Settlements, curtailments and other	25.7			(0.8		)	3.1			0.7			—			0.2			—			—			—
Amortization of unrecognized prior service (credit) cost	(0.8		)	0.1			(0.8		)	—			(0.8		)	—			(5.7		)	(6.4		)	(6.4		)
Amortization of unrecognized loss	6.3			6.6			6.5			4.8			8.2			5.3			3.1			2.7			4.9
Net periodic benefit cost	$	25.4		$	10.1		$	3.3		$	15.3		$	0.8		$	23.5		$	3.3		$	3.3		$	5.7

Defined benefit plan weighted average assumptions used in calculating benefit obligations [Text Block]

	December 31,
(percent)	2015	2014
U.S. pension plans:
Discount rate	4.15	3.75
Rate of compensation increase	N/A	N/A
U.S. other postretirement employee benefit plans:
Discount rate	3.84	3.50
Rate of compensation increase	N/A	N/A
Non-U.S. pension plans:
Discount rate	2.99	2.84
Rate of compensation increase	3.01	2.84

The Company’s weighted-average assumptions used to determine the net periodic benefit cost for its defined benefit pension and other postretirement employee benefit plans for the years ended December 31, 2015, 2014 and 2013 were as follows:

	Year Ended December 31,
(percent)	2015	2014	2013
U.S. pension plans:
Discount rate	3.89	4.41	3.67
Rate of compensation increase	N/A	N/A	N/A
Expected return on plan assets	6.71	6.75	6.75
U.S. other postretirement plans:
Discount rate	3.50	4.00	3.25
Rate of compensation increase	N/A	N/A	N/A
Expected return on plan assets	N/A	N/A	N/A
Non-U.S. pension plans:
Discount rate	2.84	3.90	3.86
Rate of compensation increase	2.84	2.77	2.72
Expected return on plan assets	6.53	6.24	6.42

Defined benefit plan estimated future benefit payments [Text Block]

	Pension benefits				Other postretirement employee benefits
(millions of dollars)
Year	U.S.		Non-U.S.
2016	$	26.8	$	17.6	$	17.1
2017	20.2		18.4		15.8
2018	19.9		19.9		14.7
2019	20.2		20.2		13.6
2020	19.9		20.3		12.9
2021-2025	95.0		115.5		48.9

Defined benefit plan effect of one percentage point change in assumed health care cost trend rates [Text Block]

	One Percentage Point
(millions of dollars)	Increase		Decrease
Effect on other postretirement employee benefit obligation	$	10.8	$	(9.3	)
Effect on total service and interest cost components	$	0.4	$	(0.4	)