| Date | Acquired | Amount |
|---|---|---|
| May 06, 2015 |
|
$ 8,400,000,000 |
| Dec 29, 2011 |
|
Undisclosed amount |
| Jan 31, 2011 |
|
$ 111,000,000 |
| Sep 25, 2000 |
|
$ 41,000,000 |
