Intangible Assets and Goodwill Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015
Goodwill [Line Items]
Balance at January 1	$ 1,539		$ 656
Acquisitions	15	[1]	929	[2]
Foreign currency translation and other	(46)		(46)
Balance at December 31	1,508		1,539
Electrical / Electronic Architecture
Goodwill [Line Items]
Balance at January 1	1,458		648
Acquisitions	10	[1]	856	[2]
Foreign currency translation and other	(44)		(46)
Balance at December 31	1,424		1,458
Powertrain Systems
Goodwill [Line Items]
Balance at January 1	8		8
Acquisitions	0		0
Foreign currency translation and other	(2)		0
Balance at December 31	6		8
Electronics And Safety
Goodwill [Line Items]
Balance at January 1	73		0
Acquisitions	5	[1]	73	[2]
Foreign currency translation and other	0		0
Balance at December 31	$ 78		$ 73

[1] 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.

[2] Primarily attributable to the acquisitions of HellermannTyton Group PLC, Control-Tec LLC and Ottomatika, Inc., as further described in Note 20. Acquisitions and Divestitures.