Restructuring and Related Implementation Charges (Details 3) - Two Thousand Twelve Restructuring Program [Member] $ in Millions	Sep. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	$ 944
Aftertax charges related to the Restructuring Program to date	698
Employee-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	384
Incremental Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	66
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	5
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	$ 489