| Date | Acquired | Amount |
|---|---|---|
| Apr 25, 2017 |
|
$ 4,300,000,000 |
| Oct 03, 2016 |
|
Undisclosed amount |
| Sep 26, 2016 |
|
$ 761,000,000 |
| Dec 16, 2015 |
|
Undisclosed amount |
| May 22, 2015 |
|
Undisclosed amount |
| Mar 09, 2015 |
|
Undisclosed amount |
| Nov 17, 2014 |
|
$ 668,000,000 |
