| Date | Acquired | Amount |
|---|---|---|
| Feb 21, 2017 |
|
Undisclosed amount |
| Sep 30, 2014 |
|
Undisclosed amount |
| Jan 25, 2013 |
|
Undisclosed amount |
| Oct 08, 2012 |
|
$ 4,300,000,000 |
| Mar 16, 2011 |
|
Undisclosed amount |
| Mar 12, 2007 |
|
$ 2,600,000,000 |
| Dec 21, 2005 |
|
$ 8,100,000,000 |
| Nov 30, 2004 |
|
$ 300,000,000 |
| Apr 27, 2004 |
|
$ 4,900,000,000 |
| Apr 02, 2004 |
|
Undisclosed amount |
| Oct 27, 2003 |
|
$ 2,950,000,000 |
| Oct 13, 2003 |
|
Undisclosed amount |
| Jun 19, 2002 |
|
Undisclosed amount |
