Business Segments - Charges and Credits Attributable to the SBUs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Rationalizations	$ (2)	$ 27	$ 35	$ 56
Net (gains) losses on asset sales	(2)	(12)	0	(13)
Asset write-offs and accelerated depreciation	1	21	2	29
Americas
Segment Reporting Information [Line Items]
Net (gains) losses on asset sales	(2)	(2)	(2)	(3)
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Net (gains) losses on asset sales	0	(10)	2	(10)
Asset write-offs and accelerated depreciation	1	21	2	29
Operating Segments
Segment Reporting Information [Line Items]
Rationalizations	(1)	27	32	56
Operating Segments | Americas
Segment Reporting Information [Line Items]
Rationalizations	0	1	3	2
Operating Segments | Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Rationalizations	(1)	26	26	53
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Rationalizations	0	0	3	1
Corporate
Segment Reporting Information [Line Items]
Rationalizations	$ (1)	$ 0	$ 3	$ 0