Intangible Assets and Goodwill Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016
Goodwill [Line Items]
Balance at January 1	$ 1,502		$ 1,531
Acquisitions	274	[1]	15	[2]
Foreign currency translation and other	168		(44)
Balance at December 31	1,944		1,502
Signal and Power Solutions
Goodwill [Line Items]
Balance at January 1	1,424		1,458
Acquisitions	0	[1]	10	[2]
Foreign currency translation and other	170		(44)
Balance at December 31	1,594		1,424
Advanced Safety and User Experience
Goodwill [Line Items]
Balance at January 1	78		73
Acquisitions	274	[1]	5	[2]
Foreign currency translation and other	(2)		0
Balance at December 31	$ 350		$ 78

[1] Primarily attributable to the acquisitions of nuTonomy, Inc. and Movimento Group, as further described in Note 20. Acquisitions and Divestitures.

[2] Primarily attributable to measurement period adjustments related to the 2015 acquisition of HellermannTyton Group PLC and the acquisition of PureDepth Inc., as further described in Note 20. Acquisitions and Divestitures.