| Date | Acquired | Amount |
|---|---|---|
| Dec 01, 2016 |
|
Undisclosed amount |
| Oct 30, 2015 |
|
$ 23,300,000,000 |
| Feb 27, 2015 |
|
Undisclosed amount |
| Jun 09, 2011 |
|
$ 110,000,000 |
| Jun 09, 2011 |
|
Undisclosed amount |
| Feb 09, 2011 |
|
$ 190,000,000 |
| Apr 21, 2010 |
|
Undisclosed amount |
