| Date | Acquired | Amount |
|---|---|---|
| Nov 14, 2017 |
|
$ 787,000,000 |
| Apr 04, 2017 |
|
Undisclosed amount |
| Jul 27, 2016 |
|
$ 1,000,000,000 |
| Jun 18, 2015 |
|
Undisclosed amount |
| Jun 15, 2015 |
|
$ 1,700,000,000 |
| May 08, 2013 |
|
£ 390,000,000 |
| Jun 11, 2012 |
|
Undisclosed amount |
| Jul 28, 2011 |
|
$ 520,000,000 |
| Jun 01, 2009 |
|
Undisclosed amount |
