| Activity in stock option plans |
The tables below summarize the employee share-based activity in the Plan:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Options |
|
Weighted-average
Exercise Price
|
|
Weighted-average
Remaining
Contractual Life
(in years)
|
|
Aggregate
Intrinsic Value
(in millions)
|
Balance at December 31, 2012 |
|
1,309,168 |
|
|
$ |
78.80 |
|
|
|
|
|
|
Granted |
|
432,370 |
|
|
112.07 |
|
|
|
|
|
|
Exercised |
|
(265,528 |
) |
|
40.48 |
|
|
|
|
|
|
Forfeited |
|
(13,674 |
) |
|
105.19 |
|
|
|
|
|
|
Balance at December 31, 2013 |
|
1,462,336 |
|
|
95.35 |
|
|
|
|
|
|
Granted |
|
350,630 |
|
|
148.98 |
|
|
|
|
|
|
Exercised |
|
(175,526 |
) |
|
82.06 |
|
|
|
|
|
|
Forfeited |
|
(10,716 |
) |
|
102.56 |
|
|
|
|
|
|
Balance at December 31, 2014 |
|
1,626,724 |
|
|
108.30 |
|
|
|
|
|
|
Granted |
|
476,205 |
|
|
135.21 |
|
|
|
|
|
|
Exercised |
|
(53,545 |
) |
|
82.89 |
|
|
|
|
|
|
Forfeited |
|
(19,698 |
) |
|
135.89 |
|
|
|
|
|
|
Balance at December 31, 2015 |
|
2,029,686 |
|
|
$ |
115.02 |
|
|
6.87 |
|
$ |
13 |
|
|
|
|
|
|
|
|
|
|
Exercisable, December 31, 2013 |
|
758,936 |
|
|
$ |
76.85 |
|
|
5.94 |
|
$ |
48 |
|
Exercisable, December 31, 2014 |
|
903,059 |
|
|
$ |
92.18 |
|
|
6.05 |
|
$ |
48 |
|
Exercisable, December 31, 2015 |
|
1,318,101 |
|
|
$ |
100.55 |
|
|
5.73 |
|
$ |
13 |
|
|
| Weighted-average grant date fair value of performance and restricted shares |
The weighted-average grant date fair value of performance and restricted shares was as follows:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Performance Shares |
|
Restricted Shares |
Nonvested |
|
Shares |
|
Weighted-average
Fair Value |
|
Shares |
|
Weighted-average
Fair Value |
Balance at December 31, 2012 |
|
630,084 |
|
|
$ |
86.49 |
|
|
62,229 |
|
|
$ |
66.43 |
|
Granted |
|
176,649 |
|
|
106.40 |
|
|
7,506 |
|
|
114.56 |
|
Vested |
|
(303,882 |
) |
|
61.48 |
|
|
(26,901 |
) |
|
62.03 |
|
Forfeited |
|
(26,938 |
) |
|
85.07 |
|
|
(10,293 |
) |
|
65.41 |
|
Balance at December 31, 2013 |
|
475,913 |
|
|
109.93 |
|
|
32,541 |
|
|
81.49 |
|
Granted |
|
206,031 |
|
|
130.38 |
|
|
— |
|
|
— |
|
Vested |
|
(207,093 |
) |
|
107.64 |
|
|
(21,266 |
) |
|
65.88 |
|
Forfeited |
|
(8,158 |
) |
|
121.18 |
|
|
— |
|
|
— |
|
Balance at December 31, 2014 |
|
466,693 |
|
|
119.78 |
|
|
11,275 |
|
|
110.94 |
|
Granted |
|
133,975 |
|
|
128.48 |
|
|
— |
|
|
— |
|
Vested |
|
(112,901 |
) |
|
115.48 |
|
|
(7,021 |
) |
|
110.66 |
|
Forfeited |
|
(67,398 |
) |
|
118.71 |
|
|
— |
|
|
— |
|
Balance at December 31, 2015 |
|
420,369 |
|
|
$ |
123.88 |
|
|
4,254 |
|
|
$ |
111.40 |
|
|