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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-based compensation expense recognized in continuing operations | The following table summarizes share-based compensation expense recognized in the Consolidated Statements of Income in Compensation and benefits (in millions):
Years ended December 31 | 2015 |  | 2014 |  | 2013
Restricted share units ("RSUs") | $ | 201 |  |  | $ | 187 |  |  | $ | 174 |
Performance share awards ("PSAs") | 127 |  |  | 132 |  |  | 117 |
Share options | — |  |  | — |  |  | 2 |
Employee share purchase plans | 11 |  |  | 9 |  |  | 7 |
Total share-based compensation expense | 339 |  |  | 328 |  |  | 300 |
Tax benefit | 95 |  |  | 94 |  |  | 81 |
Share-based compensation expense, net of tax | $ | 244 |  |  | $ | 234 |  |  | $ | 219 |
Restricted share unit activity | A summary of the status of the Company's RSUs is as follows (shares in thousands):
Years ended December 31 | 2015 |  | 2014 |  | 2013
| Shares |  | Fair Value (1) |  | Shares |  | Fair Value (1) |  | Shares |  | Fair Value (1)
Non-vested at beginning of year | 8,381 |  |  | $ | 63 |  |  | 9,759 |  |  | $ | 51 |  |  | 10,432 |  |  | $ | 44 |
Granted | 2,459 |  |  | 97 |  |  | 2,844 |  |  | 84 |  |  | 3,714 |  |  | 62 |
Vested | (3,385 | ) |  | 58 |  |  | (3,732 | ) |  | 49 |  |  | (3,945 | ) |  | 44 |
Forfeited | (288 | ) |  | 71 |  |  | (490 | ) |  | 58 |  |  | (442 | ) |  | 47 |
Non-vested at end of year | 7,167 |  |  | 77 |  |  | 8,381 |  |  | 63 |  |  | 9,759 |  |  | 51 |
(1) | Represents per share weighted average fair value of award at date of grant.
Performance-based plans | Information regarding the Company's target PSAs granted and shares that would be issued at current performance levels for PSAs granted during the years ended December 31, 2015, 2014 and 2013, respectively, is as follows (shares in thousands, dollars in millions, except fair value):
| 2015 |  | 2014 |  | 2013
Target PSAs granted | 993 |  |  | 816 |  |  | 1,135 |
Weighted average fair value per share at date of grant | $ | 96 |  |  | $ | 81 |  |  | $ | 58 |
Number of shares that would be issued based on current performance levels | 982 |  |  | 1,591 |  |  | 2,191 |
Unamortized expense, based on current performance levels | $ | 67 |  |  | $ | 45 |  |  | $ | — |
Share options and related information | A summary of the status of the Company's share options and related information is as follows (shares in thousands):
Years ended December 31 | 2015 |  | 2014 |  | 2013
| Shares |  | Weighted-Average Exercise Price Per Share |  | Shares |  | Weighted-Average Exercise Price Per Share |  | Shares |  | Weighted-Average Exercise Price Per Share
Beginning outstanding | 2,300 |  |  | $ | 32 |  |  | 3,462 |  |  | $ | 32 |  |  | 5,611 |  |  | $ | 32 |
Granted | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Exercised | (1,450 | ) |  | 27 |  |  | (1,155 | ) |  | 33 |  |  | (2,116 | ) |  | 32 |
Forfeited and expired | (13 | ) |  | 39 |  |  | (7 | ) |  | 37 |  |  | (33 | ) |  | 34 |
Outstanding at end of year | 837 |  |  | 40 |  |  | 2,300 |  |  | 32 |  |  | 3,462 |  |  | 32 |
Exercisable at end of year | 837 |  |  | 40 |  |  | 2,273 |  |  | 32 |  |  | 3,270 |  |  | 32 |
Shares available for grant | 12,179 |  |  |  |  |  | 16,333 |  |  |  |  |  | 11,330 |  |  |  |
Summary of options outstanding and exercisable | A summary of options outstanding and exercisable as of December 31, 2015 is as follows (shares in thousands):
| Options Outstanding |  | Options Exercisable
Range of Exercise Prices | Shares Outstanding |  | Weighted-Average Remaining Contractual Life (years) |  | Weighted-Average Exercise Price Per Share |  | Shares Exercisable |  | Weighted-Average Remaining Contractual Life (years) |  | Weighted-Average Exercise Price Per Share
19.54 - 25.51 | 79 |  |  | 2.18 |  | $ | 20.18 |  |  | 79 |  |  | 2.18 |  | $ | 20.18 |
25.52 - 32.53 | 25 |  |  | 1.93 |  | 29.15 |  |  | 25 |  |  | 1.93 |  | 29.15 |
32.54 - 36.88 | 160 |  |  | 1.14 |  | 35.77 |  |  | 160 |  |  | 1.14 |  | 35.77 |
36.89 - 43.44 | 247 |  |  | 3.12 |  | 39.32 |  |  | 247 |  |  | 3.12 |  | 39.32 |
43.45 - 52.93 | 326 |  |  | 2.46 |  | 48.26 |  |  | 326 |  |  | 2.46 |  | 48.26 |
| 837 |  |  |  |  |  |  |  | 837 |  |  |  |  |  |
Other information related to the company's share options | Other information related to the Company's share options is as follows (in millions):
| 2015 |  | 2014 |  | 2013
Aggregate intrinsic value of stock options exercised | $ | 104 |  |  | $ | 61 |  |  | $ | 73 |
Cash received from the exercise of stock options | 40 |  |  | 38 |  |  | 61 |
Tax benefit realized from the exercise of stock options | 36 |  |  | 16 |  |  | 15 |

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