Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation Plans - Restricted Stock Units (Details)

v3.6.0.2
Stock-based Compensation Plans - Restricted Stock Units (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Weighted-average Grant Date Fair Value      
Cash used to settle awards $ 1,700 $ 3,000 $ 2,700
Stock-settled Restricted Stock and Restricted Stock Units      
Shares/Units      
Outstanding at beginning of period (in shares) 22,556,018    
Granted (in shares) 157,125,817    
Vested (in shares) (18,729,422)    
Canceled (in shares) (4,459,467)    
Outstanding at end of period (in shares) 156,492,946 22,556,018  
Weighted-average Grant Date Fair Value      
Outstanding at beginning of period (in dollars per share) $ 9.14    
Granted (in dollars per share) 11.95    
Vested (in dollars per share) 8.31    
Canceled (in dollars per share) 11.60    
Outstanding at end of period (in dollars per share) $ 11.99 $ 9.14  
Cash-settled Restricted Stock Units | Key Employee Equity Plan      
Shares/Units      
Outstanding at beginning of period (in shares) 255,355,014    
Granted (in shares) 5,787,494    
Vested (in shares) (132,833,423)    
Canceled (in shares) (7,073,596)    
Outstanding at end of period (in shares) 121,235,489 255,355,014  
Restricted Stock and Restricted Stock Units      
Weighted-average Grant Date Fair Value      
Total unrecognized compensation cost $ 1,200    
Expected period of total unrecognized compensation cost 4 years    
Total unrecognized compensation cost, period for recognition 1 year 7 months    
Fair value of vested in period $ 358 $ 145 $ 704