Balance Sheet Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Receivables, net:
Customers	$ 1,423.6	$ 1,200.6
Other	243.3	245.2
Gross receivables	1,666.9	1,445.8
Bad debt allowance(a)	(1.9)	(2.3)
Total receivables, net	1,665.0	1,443.5
Inventories, net:
Raw material and supplies	412.9	319.5
Work in progress	102.5	89.0
Finished goods	222.4	115.5
FIFO inventories	737.8	524.0
LIFO reserve	(14.2)	(18.3)
Total inventories, net	723.6	505.7
Prepayments and other current assets:
Prepaid tooling	98.5	72.5
Restricted cash	12.3	0.0
Prepaid taxes	11.9	17.2
Other	46.3	40.5
Total prepayments and other current assets	169.0	130.2
Property, plant and equipment, net:
Property, plant and equipment, gross	3,327.8	3,043.9
Accumulated depreciation	(1,036.8)	(1,076.8)
Property, plant & equipment, net, excluding tooling	2,291.0	1,967.1
Tooling, net of amortization	157.1	126.8
Property, plant & equipment, net	2,448.1	2,093.9
Investments and other long-term receivables:
Investment in equity affiliates	200.1	184.2
Other long-term receivables	260.8	219.1
Total investments and other long-term receivables	460.9	403.3
Other non-current assets:
Deferred income taxes	213.5	180.5
Product liability insurance asset	108.5	111.8
Other	173.7	110.9
Total other non-current assets	495.7	403.2
Accounts payable and accrued expenses:
Trade payables	1,225.6	979.2
Payroll and employee related	201.1	199.5
Product warranties	70.6	91.9
Customer related	55.7	58.1
Product liability	47.7	47.4
Unrecognized tax benefits	45.5	0.0
Severance	29.4	43.9
Interest	20.4	12.0
Retirement related	20.1	20.0
Dividends payable to noncontrolling shareholders	20.0	15.9
Derivatives	19.1	2.4
Other	111.2	60.0
Total accounts payable and accrued expenses	1,866.4	1,530.3
Other non-current liabilities:
Product liability	60.8	64.4
Deferred income taxes	120.1	46.8
Product warranties	37.3	40.1
Deferred revenue	36.6	37.8
Other	160.4	136.9
Total other non-current liabilities	415.2	326.0
Bad debt allowance
Trade payables for capital expenditures	76.9	58.4
Interest costs capitalized	16.5	13.5	$ 11.9
Land [Member]
Property, plant and equipment, net:
Property, plant and equipment, gross	118.2	107.0
Building [Member]
Property, plant and equipment, net:
Property, plant and equipment, gross	661.7	677.8
Machinery and equipments
Property, plant and equipment, net:
Property, plant and equipment, gross	2,154.3	1,940.3
Capital leases
Property, plant and equipment, net:
Property, plant and equipment, gross	7.2	8.4
Construction in progress
Property, plant and equipment, net:
Property, plant and equipment, gross	386.4	310.4
Allowance for Doubtful Accounts [Member]
Bad debt allowance
Beginning balance, January 1	(2.3)	(2.1)	(2.1)
Provision	(0.5)	(0.6)	(0.3)
Write-offs	0.7	0.3	0.4
Translation adjustment and other	0.2	0.1	(0.1)
Ending balance, December 31	$ (1.9)	$ (2.3)	$ (2.1)