Share-Based Compensation (Narrative) (Details) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended |
|---|---|
|
Mar. 31, 2016
USD ($)
$ / shares
shares
| |
| Number of stock options granted | shares | 20.7 |
| Number of restricted share units granted | shares | 5.9 |
| Weighted average fair value of stock options granted | $ / shares | $ 11.45 |
| Weighted average fair value of restricted share units granted | $ / shares | $ 59.5 |
| Restricted Share Units [Member] | |
| Unrecognized pretax compensation expense on nonvested awards | $ | $ 903 |
| Stock Options [Member] | |
| Unrecognized pretax compensation expense on nonvested awards | $ | $ 496 |