Restructuring and Related Implementation Charges (Details 3) - 2012 Restructuring Program $ in Millions	Dec. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	$ 1,228
Aftertax charges related to the Restructuring Program to date	907
Employee Related Costs
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	465
Incremental Depreciation
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	80
Asset Impairment
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	27
Other
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	$ 656