| Date | Acquired | Amount |
|---|---|---|
| Feb 20, 2012 |
|
CA$ 1,240,000,000 |
| Dec 20, 2011 |
|
Undisclosed amount |
| Apr 27, 2011 |
|
$ 260,000,000 |
| Sep 10, 2010 |
|
£ 218,000,000 |
| May 29, 2007 |
|
$ 3,300,000,000 |
| Jul 17, 2002 |
|
Undisclosed amount |
| May 06, 1999 |
|
$ 600,000,000 |
| Feb 01, 1999 |
|
Undisclosed amount |
| Nov 17, 1997 |
|
$ 132,000,000 |
| Jan 12, 1996 |
|
$ 78,800,000 |
| Jan 05, 1995 |
|
$ 3,600,000 |
