Business Segments - Charges and Credits Attributable to the SBUs (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jul. 01, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Rationalizations		$ 5	$ 46	$ 40	$ 102
Total Net (Gains) Losses on Asset Sales		288	1	274	14
Gain on TireHub transaction, net of transaction costs	$ 286	287	0	273	0
Asset write-offs and accelerated depreciation		0	10	2	39
Americas
Segment Reporting Information [Line Items]
Total Net (Gains) Losses on Asset Sales		288	1	276	4
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Total Net (Gains) Losses on Asset Sales		0	0	(2)	10
Asset write-offs and accelerated depreciation		0	10	2	39
Operating Segments
Segment Reporting Information [Line Items]
Rationalizations		5	30	37	86
Operating Segments | Americas
Segment Reporting Information [Line Items]
Rationalizations		0	4	3	6
Operating Segments | Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Rationalizations		5	25	31	78
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Rationalizations		0	1	3	2
Corporate
Segment Reporting Information [Line Items]
Rationalizations		$ 0	$ 16	$ 3	$ 16