Restructuring (Details Textual) - Jun. 30, 2015 - USD ($) $ in Millions	Total	Total
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 63	$ 155
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected pre-tax accounting charges	935	935
Separation and other headcount-related costs	535	535
Accelerated depreciation and asset impairment and other related charges		400
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected pre-tax accounting charges	1,035	1,035
Separation and other headcount-related costs	585	585
Accelerated depreciation and asset impairment and other related charges		450
Separation and Other Headcount-related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total costs incurred to date	478	478
Asset-related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Total costs incurred to date	$ 235	$ 235