Restructuring charges/other (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			18 Months Ended	39 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Mar. 31, 2015 Jobs	Mar. 31, 2015
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ (1)	[1]	$ 26
Payments	12
Gains on sales of assets	0		37
Semiconductor manufacturing facility in Nice, France
Restructuring Cost And Reserve [Line Items]
Gains on sales of assets			30
Semiconductor manufacturing facilities in Hiji, Japan, and Houston, Texas
Restructuring Cost And Reserve [Line Items]
Gains on sales of assets			7
2013 Actions
Restructuring Cost And Reserve [Line Items]
Expected number of positions to be eliminated				1,100
Restructuring charges	(1)		32	74
2013 Actions | Severance and benefits cost
Restructuring Cost And Reserve [Line Items]
Restructuring charges	(1)	[1]
Payments	5			48
Prior Actions
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0		(6)
Prior Actions | Severance and benefits cost
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0	[1]
Payments	6
Prior Actions | Severance and benefits cost | Former Reporting Segment Wireless
Restructuring Cost And Reserve [Line Items]
Payments					$ 356

[1] Includes changes in estimates.