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Revenue from Contracts with Customers Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Net sales $ 1,425.1 $ 1,343.5
North America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 1,094.2 1,052.9
Asia [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 134.0 109.2
Europe [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 174.2 160.1
South America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 22.7 21.3
Driveline [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 1,025.0 945.8
Driveline [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 773.8 725.1
Driveline [Member] | Asia [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 121.2 103.1
Driveline [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 110.0 98.9
Driveline [Member] | South America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 20.0 18.7
Metal Forming [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 400.1 397.7
Metal Forming [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 320.4 327.8
Metal Forming [Member] | Asia [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 12.8 6.1
Metal Forming [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 64.2 61.2
Metal Forming [Member] | South America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales $ 2.7 $ 2.6