| Date | Acquired | Amount |
|---|---|---|
| Sep 07, 2017 |
|
Undisclosed amount |
| Jul 03, 2017 |
|
$ 1,240,000,000 |
| Jun 26, 2017 |
|
Undisclosed amount |
| Oct 20, 2016 |
|
Undisclosed amount |
| May 11, 2015 |
|
$ 310,000,000 |
