Costs Associated with Rationalization Programs - Narrative (Details) $ in Millions		3 Months Ended
	Mar. 18, 2019 facility position	Mar. 31, 2019 USD ($) employee	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of facilities affected | facility	2
Expected number of positions eliminated | employee		1,450
Rationalization charges incurred to date				$ 720
Rationalizations		$ 103	$ 37
Rationalizations accrual balance		162		$ 81
Rationalization reversals		2	5
Rationalization charges expected to be incurred in future periods		$ 45
Current Year Plans
Restructuring Cost and Reserve [Line Items]
Expected number of positions eliminated | employee		1,050
Rationalizations		$ 100	31
Number of positions eliminated | employee		50
Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		$ 3	6
Number of positions eliminated | employee		100
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		$ 93
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		35
Europe, Middle East, and Africa Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency | Prior Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		3
Employee Severance
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		24
Employee Severance | Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations			25
Americas Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency
Restructuring Cost and Reserve [Line Items]
Rationalizations accrual balance		6
Americas Restructuring Plan - Manufacturing Employee Severance and Operating Efficiency | Current Year Plans
Restructuring Cost and Reserve [Line Items]
Rationalizations		$ 7
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			$ 7
Amiens Restructuring Plan | Amiens Labor Claims
Restructuring Cost and Reserve [Line Items]
Loss contingency, number of plaintiffs | employee		850