Reporting Segments and Related Information - Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues from External Customers and Long-Lived Assets [Line Items]
Maximum percentage in consolidated sales of countries outside the US other than Germany France Hungary and South Korea									5.00%
Investment in NSK-Warner	$ 217.4				$ 205.2				$ 217.4	$ 205.2
Net sales	1,773.7	1,791.8	1,818.8	1,730.4	1,533.4	1,410.9	1,421.7	1,286.8	7,114.7	5,652.8	3,961.8
Long-lived assets	1,664.3				1,542.6				1,664.3	1,542.6	1,490.3
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,674.0	1,451.1	1,090.4
Long-lived assets	492.6				466.6				492.6	466.6	469.4
Total Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									3,984.0	3,123.0	2,224.7
Long-lived assets	735.1				737.2				735.1	737.2	769.4
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									2,200.0	1,839.9	1,419.9
Long-lived assets	420.4				447.5				420.4	447.5	500.0
Hungary
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									503.2	418.3	292.4
Long-lived assets	56.9				53.0				56.9	53.0	58.4
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									363.0	318.7	229.5
Long-lived assets	63.2				63.0				63.2	63.0	72.9
Other Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									917.8	546.1	282.9
Long-lived assets	194.6				173.7				194.6	173.7	138.1
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									471.7	358.0	212.4
Long-lived assets	124.5				94.8				124.5	94.8	69.1
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									416.6	330.6	184.1
Long-lived assets	148.0				104.9				148.0	104.9	66.1
Other Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									568.4	390.1	250.2
Long-lived assets	164.1				139.1				164.1	139.1	116.3
NSK Warner [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Equity investment in NSK Warner, percent	50.00%								50.00%
Investment in NSK-Warner	$ 189.2				$ 180.3				$ 189.2	$ 180.3	$ 174.0