| Date | Acquired | Amount |
|---|---|---|
| Jul 19, 2017 |
|
Undisclosed amount |
| Jul 07, 2016 |
|
$ 1,400,000,000 |
| Jul 08, 2015 |
|
Undisclosed amount |
| May 01, 2013 |
|
Undisclosed amount |
| Sep 22, 2011 |
|
Undisclosed amount |
| Jul 31, 2002 |
|
Undisclosed amount |
