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Revenue from Contracts with Customers Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation of Revenue [Line Items]    
Net sales $ 1,343.5 $ 1,719.2
North America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 1,052.9 1,355.8
Asia [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 109.2 160.8
Europe [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 160.1 174.3
South America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 21.3 28.3
Driveline [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 1,012.0 1,148.7
Driveline [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 791.3 868.0
Driveline [Member] | Asia [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 103.1 153.3
Driveline [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 98.9 101.6
Driveline [Member] | South America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 18.7 25.8
Metal Forming [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 331.5 388.1
Metal Forming [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 261.6 305.4
Metal Forming [Member] | Asia [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 6.1 7.5
Metal Forming [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 61.2 72.7
Metal Forming [Member] | South America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 2.6 2.5
Casting [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 0.0 182.4
Casting [Member] | North America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 0.0 182.4
Casting [Member] | Asia [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 0.0 0.0
Casting [Member] | Europe [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 0.0 0.0
Casting [Member] | South America [Member]    
Disaggregation of Revenue [Line Items]    
Net sales $ 0.0 $ 0.0