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Costs Associated with Rationalization Programs - Narrative (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Mar. 18, 2019
facility
position
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
employee
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Restructuring Cost and Reserve [Line Items]            
Expected number of positions eliminated | employee       1,200    
Rationalizations accrual balance   $ 157   $ 157   $ 81
Rationalizations   21 $ 5 128 $ 40  
Rationalization reversals     1 3 13  
Rationalization charges incurred to date           $ 720
Rationalization charges expected to be incurred in future periods   110   $ 110    
Current Year Plans            
Restructuring Cost and Reserve [Line Items]            
Expected number of positions eliminated | employee       1,200    
Rationalizations   20 1 $ 123 33  
Number of positions eliminated | employee       250    
Prior Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations   1 4 $ 5 7  
Number of positions eliminated | employee       300    
Modernizing Tire Manufacturing Facilities in Germany            
Restructuring Cost and Reserve [Line Items]            
Number of facilities affected | facility 2          
Expected number of positions eliminated | position 1,100          
Modernizing Tire Manufacturing Facilities in Germany | Current Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations accrual balance   96   $ 96    
Voluntary Buy-outs, Gadsden, Alabama | Current Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations accrual balance   6   6    
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency            
Restructuring Cost and Reserve [Line Items]            
Rationalizations accrual balance   27   27    
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency | Current Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations   11   105    
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency | Prior Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations   1 2 5 4  
Employee Severance            
Restructuring Cost and Reserve [Line Items]            
Rationalizations accrual balance   18   18    
Employee Severance | Current Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations     1   27  
Employee Severance | Prior Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations         3  
Americas Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency            
Restructuring Cost and Reserve [Line Items]            
Rationalizations accrual balance   5   5    
Americas Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency | Current Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations   $ 9   $ 18    
Europe, Middle East, and Africa Restructuring Plan - Operating Efficiency | Current Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations         6  
Philippsburg Restructuring | Prior Year Plans            
Restructuring Cost and Reserve [Line Items]            
Rationalizations     $ 2   $ 11  
Amiens Restructuring Plan | Amiens Labor Claims            
Restructuring Cost and Reserve [Line Items]            
Loss contingency, number of plaintiffs | employee       850