| Date | Acquired | Amount |
|---|---|---|
| Feb 07, 2017 |
|
$ 550,000,000 |
| Sep 03, 2015 |
|
Undisclosed amount |
| May 12, 2015 |
|
Undisclosed amount |
| Jun 13, 2014 |
|
$ 2,600,000,000 |
| May 21, 2013 |
|
$ 1,800,000,000 |
| Sep 21, 2004 |
|
$ 161,000,000 |
| May 03, 2004 |
|
Undisclosed amount |
