Restructuring and Related Implementation Charges (Details 3) - 2012 Restructuring Program $ in Millions	Jun. 30, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	$ 1,416
Aftertax charges related to the Restructuring Program to date	1,053
Employee-Related Costs
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	573
Incremental Depreciation
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	86
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	29
Other
Restructuring Cost and Reserve [Line Items]
Pretax charges related to the Restructuring Program to date	$ 728