| Date | Acquired | Amount |
|---|---|---|
| May 18, 2017 |
|
Undisclosed amount |
| Feb 03, 2016 |
|
$ 2,300,000,000 |
| Jun 17, 2013 |
|
Undisclosed amount |
| Dec 29, 2011 |
|
Undisclosed amount |
