Business Segments - Rationalizations, Asset Sales, Other Expense and Asset Write-offs and Accelerated Depreciation Attributable to the SBUs (Details) - USD ($) $ in Millions		12 Months Ended
	Jul. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Rationalizations		$ 44	$ 135	$ 210
Net (gains) losses on asset sales		(273)	(14)	(31)
Deconsolidation, gain (loss), amount	$ 286	272	0	0
Asset write-offs and accelerated depreciation		4	40	20
Americas
Segment Reporting Information [Line Items]
Asset write-offs and accelerated depreciation		0	0	1
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Asset write-offs and accelerated depreciation		4	40	19
Operating Segments
Segment Reporting Information [Line Items]
Rationalizations		42	119	200
Net (gains) losses on asset sales		(273)	(14)	(22)
Operating Segments | Americas
Segment Reporting Information [Line Items]
Rationalizations		3	6	15
Net (gains) losses on asset sales		(275)	(4)	(4)
Operating Segments | Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Rationalizations		36	111	184
Net (gains) losses on asset sales		2	(10)	(17)
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Rationalizations		3	2	1
Net (gains) losses on asset sales		0	0	(1)
Corporate
Segment Reporting Information [Line Items]
Rationalizations		2	16	10
Net (gains) losses on asset sales		$ 0	$ 0	$ (9)