v3.7.0.1
Taxes on Earnings (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Taxes on Earnings    
Tax expense (benefit) on gain or loss on sale of business $ 430  
Tax expense (benefit) from resolution of various tax positions related to prior years   $ (390)
Increase (decrease) in gross unrecognized tax benefits (33) (444)
Continuing operations    
Taxes on Earnings    
Tax expense (benefit) from resolution of various tax positions related to prior years   (140)
Discontinued operations    
Taxes on Earnings    
Tax expense (benefit) from resolution of various tax positions related to prior years (33) $ (247)
Minimum    
Taxes on Earnings    
Decrease reasonably possible in gross unrecognized tax benefits 200  
Maximum    
Taxes on Earnings    
Decrease reasonably possible in gross unrecognized tax benefits 350  
Dispositions held for sale | Continuing operations | AMO    
Taxes on Earnings    
Tax expense (benefit) on gain or loss on sale of business $ 430