Restructuring (Summary of Charges by Type) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Separation costs	$ 2	$ 57
Asset impairments	(31)	(31)
Accelerated depreciation	22	75
Other	18	65
Total	11	166
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Separation costs	0	0
Asset impairments	0	0
Accelerated depreciation	12	38
Other	1	4
Total	13	42
Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Separation costs	0	0
Asset impairments	0	0
Accelerated depreciation	6	27
Other	7	21
Total	13	48
Selling, General and Administrative [Member]
Restructuring Cost and Reserve [Line Items]
Separation costs	0	0
Asset impairments	0	0
Accelerated depreciation	4	10
Other	7	25
Total	11	35
Other [Member]
Restructuring Cost and Reserve [Line Items]
Separation costs	2	57
Asset impairments	(31)	(31)
Accelerated depreciation	0	0
Other	3	15
Total	$ (26)	$ 41