Balance Sheet Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Receivables, net:
Customers	$ 1,037.4		$ 859.5
Other	149.9		168.4
Gross receivables	1,187.3		1,027.9
Bad debt allowance	(4.3)	[1]	(4.0)	[1]
Total receivables, net	1,183.0		1,023.9
Inventories, net:
Raw material and supplies	254.4		244.0
Work in progress	90.9		88.1
Finished goods	124.3		111.7
FIFO inventories	469.6		443.8
LIFO reserve	(15.3)		(13.2)
Total inventories, net	454.3		430.6
Prepayments and other current assets:
Prepaid tooling	23.5		21.8
Product liability insurance receivable	28.8		25.8
Derivatives	2.7		2.7
Prepaid taxes	0.8		5.8
Other	26.6		23.6
Total prepayments and other current assets	82.4		79.7
Property, plant and equipment:
Property, plant and equipment, gross	2,903.9		2,761.0
Accumulated depreciation	1,343.9		1,308.0
Property plant and equipment, net, excluding tooling	1,560.0		1,453.0
Tooling, net of amortization	104.3		89.6
Property, plant & equipment, net	1,664.3		1,542.6
Investments and advances:
Investment in equity affiliates	217.4		205.2
Other investments and advances	127.9		102.7
Total investments and advances	345.3		307.9
Other non-current assets:
Product liability insurance asset	32.9		24.8
Deferred income taxes	313.9	[2]	305.5	[2]
Other intangible assets	243.3		168.8
Other	34.9		32.0
Total other non-current assets	625.0		531.1
Accounts payable and accrued liabilities
Trade payables	820.7		737.7
Trade payables for capital expenditures	48.9		28.9
Payroll and employee related	201.9		190.2
Product warranties	38.6		37.0
Retirement related	30.9		34.7
Customer related	29.9		32.5
Product liability	28.8		25.8
Interest	14.2		14.3
Dividends payable to noncontrolling interest	11.7		4.2
Insurance	10.5		11.9
Legal and professional fees	6.8		8.6
Current deferred income taxes	6.5		18.4
Severance	5.6		4.6
Environmental	3.4		21.0
Derivatives	2.4		3.3
Other	37.0		51.0
Total accounts payable and accrued expenses	1,297.8		1,224.1
Other non-current liabilities:
Deferred income taxes	120.2	[2]	113.7	[2]
Cross currency swaps and derivatives	85.5		78.8
Product warranties	34.1		29.8
Product liability accrual	32.9		24.8
Deferred revenue	26.0		23.4
Environmental	8.1		8.2
Other noncurrent liabilities	85.1		84.2
Total other non-current liabilities	391.9		362.9
Bad debt allowance
Assets pledged as collateral under long-term debt agreements	0		3.4
Asset retirement obligation locations involved	47
Asset retirement obligation	1.1		1.2
Interest costs capitalized	15.0		11.2
Allowance for Doubtful Accounts [Member]
Bad debt allowance
Beginning balance	(4.0)		(4.3)		(5.7)
Provision	(1.4)		(1.1)		0.1
Write-offs	1.0		2.5		1.4
Translation adjustment	0.1		(1.1)		(0.1)
Ending balance	(4.3)		(4.0)		(4.3)
Land [Member]
Property, plant and equipment:
Property, plant and equipment, gross	71.2		67.9
Building [Member]
Property, plant and equipment:
Property, plant and equipment, gross	616.7		601.4
Machinery and equipments
Property, plant and equipment:
Property, plant and equipment, gross	2,006.9		1,961.2
Capital leases
Property, plant and equipment:
Property, plant and equipment, gross	2.3		2.3
Construction in progress
Property, plant and equipment:
Property, plant and equipment, gross	$ 206.8		$ 128.2

[1] (a) Bad debt allowance:2011 2010 2009Beginning balance, January 1$(4.0) $(4.3) $(5.7)Provision(1.4) (1.1) 0.1Write-offs1.0 2.5 1.4Translation adjustment and other0.1 (1.1) (0.1)Ending balance, December 31$(4.3) $(4.0) $(4.3)

[2] *Other non-current assets and liabilities have been netted within their respective taxing jurisdictions due to consolidation (primarily U.S. and Germany).