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Revenue from Contracts with Customers Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Disaggregation of Revenue [Line Items]        
Net sales $ 1,414.1 $ 1,677.4 $ 3,272.9 $ 5,100.9
North America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 1,122.9 1,369.3 2,519.9 4,101.7
Asia [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 128.9 141.3 336.2 445.0
Europe [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 147.5 139.0 378.4 471.3
South America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 14.8 27.8 38.4 82.9
Driveline [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 1,093.9 1,152.4 2,502.4 3,456.7
Driveline [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 870.8 917.0 1,922.5 2,688.9
Driveline [Member] | Asia [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 116.7 131.0 307.9 419.3
Driveline [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 94.1 77.9 239.3 270.3
Driveline [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 12.3 26.5 32.7 78.2
Metal Forming [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 320.2 369.6 770.5 1,135.1
Metal Forming [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 252.1 296.9 597.4 903.7
Metal Forming [Member] | Asia [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 12.2 10.3 28.3 25.7
Metal Forming [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 53.4 61.1 139.1 201.0
Metal Forming [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 2.5 1.3 5.7 4.7
Casting [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 0.0 155.4 0.0 509.1
Casting [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 0.0 155.4 0.0 509.1
Casting [Member] | Asia [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 0.0 0.0 0.0 0.0
Casting [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Net sales 0.0 0.0 0.0 0.0
Casting [Member] | South America [Member]        
Disaggregation of Revenue [Line Items]        
Net sales $ 0.0 $ 0.0 $ 0.0 $ 0.0