Restructuring Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 52	$ 129	$ 167	$ 65
Asset Impairment Charges		9	1	7
Cash expenditures for restructuring		127	90
Discontinued Operations | Powertrain Systems
Restructuring Cost and Reserve [Line Items]
Restructuring		90	161	115
Advanced Safety and User Experience
Restructuring Cost and Reserve [Line Items]
Restructuring		62	42	26
Cost of Sales | Fair Value, Measurements, Nonrecurring
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges		9	1	$ 7
Overhead cost reduction
Restructuring Cost and Reserve [Line Items]
Restructuring			91
European footprint rotation | EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring		89	39
European footprint rotation | EMEA | Plant Closure | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Restructuring		54	93
European footprint rotation | EMEA | Advanced Safety and User Experience | Plant Closure
Restructuring Cost and Reserve [Line Items]
Restructuring		$ 36
Restructuring and Related Activities, Completion Date		Dec. 31, 2019
European footprint rotation | EMEA | Powertrain Systems | Plant Closure | Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Restructuring			$ 68