| Date | Acquired | Amount |
|---|---|---|
| Nov 03, 2016 |
|
$ 400,000,000 |
| May 01, 2014 |
|
£ 450,000,000 |
| Oct 26, 2011 |
|
Undisclosed amount |
| Sep 22, 2008 |
|
Undisclosed amount |
| Apr 24, 2006 |
|
$ 102,000,000 |
| Jun 20, 2005 |
|
$ 160,000,000 |
| Jul 01, 2004 |
|
$ 40,000,000 |
| Jun 24, 2004 |
|
Undisclosed amount |
| Apr 22, 2003 |
|
$ 1,225,000,000 |
| Nov 04, 2000 |
|
$ 2,340,000,000 |
| Mar 01, 1993 |
|
Undisclosed amount |
| Aug 27, 1985 |
|
$ 667,500,000 |
