| Date | Acquired | Amount |
|---|---|---|
| Oct 08, 2015 |
|
Undisclosed amount |
| Sep 29, 2014 |
|
$ 410,000,000 |
| Feb 28, 2011 |
|
$ 935,000,000 |
| Nov 01, 2008 |
|
$ 4,600,000,000 |
| May 21, 2008 |
|
Undisclosed amount |
