| Date | Acquired | Amount |
|---|---|---|
| Oct 23, 2015 |
|
$ 1,200,000,000 |
| Feb 25, 2015 |
|
$ 250,000,000 |
| Aug 27, 2013 |
|
Undisclosed amount |
| Nov 01, 2012 |
|
Undisclosed amount |
| Sep 21, 2012 |
|
Undisclosed amount |
| Jul 30, 2012 |
|
$ 83,000,000 |
| Jul 02, 2012 |
|
Undisclosed amount |
| Jun 29, 2012 |
|
Undisclosed amount |
| Oct 02, 2011 |
|
$ 29,000,000 |
| Jul 07, 2011 |
|
$ 200,000,000 |
| Apr 01, 2011 |
|
Undisclosed amount |
| Jan 01, 2011 |
|
Undisclosed amount |
| Sep 20, 2010 |
|
Undisclosed amount |
| Aug 26, 2010 |
|
Undisclosed amount |
| Sep 29, 2009 |
|
$ 342,000,000 |
| Dec 18, 2007 |
|
£ 946,000,000 |
