Employee Separation / Asset Related Charges, Net (Schedule of 2016 Restructuring Program Charges) (Details) - USD ($) $ in Millions		3 Months Ended			12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 297	$ 244
2016 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 798			$ 798
Restructuring reserve, payments					(3)
Restructuring reserve, asset write-offs and adjustments					(115)
Restructuring reserve		680			680
2016 Restructuring Program [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					656
Restructuring reserve, payments					(2)
Restructuring reserve, asset write-offs and adjustments					(6)
Restructuring reserve		648			648
2016 Restructuring Program [Member] | Asset Related [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					109
Restructuring reserve, payments					0
Restructuring reserve, asset write-offs and adjustments					(109)
Restructuring reserve		0			0
2016 Restructuring Program [Member] | Other Non-Personnel Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	[1]				33
Restructuring reserve, payments	[1]				(1)
Restructuring reserve, asset write-offs and adjustments	[1]				0
Restructuring reserve	[1]	$ 32			$ 32

[1] Other non-personnel charges consist of contractual obligation costs.