Employee Separation / Asset Related Charges, Net Employee Separation / Asset Related Charges, Net (2014 Restructuring Program Charges) table (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended			3 Months Ended
	Dec. 31, 2014		Dec. 31, 2014		Dec. 31, 2012	Jun. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 299		$ 440		$ 134
Restructuring reserve	277		277
2014 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			562			263
Restructuring reserve, payments			(60)
Restructuring reserve, net translation adjustment			(8)
Restructuring reserve, asset write-offs and adjustments			(226)
Restructuring reserve	268		268
2014 Restructuring Program [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			319
Restructuring reserve, payments			(47)
Restructuring reserve, net translation adjustment			(8)
Restructuring reserve, asset write-offs and adjustments			0
Restructuring reserve	264		264
2014 Restructuring Program [Member] | Asset Related [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			226
Restructuring reserve, payments			0
Restructuring reserve, net translation adjustment			0
Restructuring reserve, asset write-offs and adjustments			(226)
Restructuring reserve	0		0
2014 Restructuring Program [Member] | Other Non-Personnel Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			17	[1]
Restructuring reserve, payments			(13)	[1]
Restructuring reserve, net translation adjustment			0	[1]
Restructuring reserve, asset write-offs and adjustments			0	[1]
Restructuring reserve	$ 4	[1]	$ 4	[1]

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