| Date | Acquired | Amount |
|---|---|---|
| Oct 05, 2017 |
|
Undisclosed amount |
| Sep 21, 2015 |
|
$ 4,600,000,000 |
| Jul 02, 2013 |
|
$ 345,000,000 |
| Feb 10, 2011 |
|
Undisclosed amount |
