| Date | Acquired | Amount |
|---|---|---|
| Apr 28, 2016 |
|
$ 25,000,000,000 |
| Apr 06, 2016 |
|
Undisclosed amount |
| Feb 02, 2016 |
|
$ 5,300,000,000 |
| Jul 31, 2015 |
|
$ 250,000,000 |
| Dec 12, 2014 |
|
$ 305,000,000 |
| Oct 29, 2014 |
|
$ 250,000,000 |
| May 15, 2014 |
|
$ 2,900,000,000 |
| Jul 15, 2013 |
|
$ 400,000,000 |
| Jul 15, 2013 |
|
$ 310,000,000 |
| May 22, 2010 |
|
$ 3,700,000,000 |
| Mar 09, 2010 |
|
$ 450,000,000 |
| Dec 14, 2009 |
|
$ 123,000,000 |
| Nov 12, 2009 |
|
$ 190,000,000 |
| Sep 11, 2009 |
|
$ 410,000,000 |
| Sep 03, 2009 |
|
$ 400,000,000 |
| Jan 12, 2009 |
|
$ 2,800,000,000 |
| Dec 17, 2008 |
|
Undisclosed amount |
| Oct 25, 2004 |
|
$ 81,000,000 |
| Oct 11, 2004 |
|
$ 320,000,000 |
| Apr 06, 2004 |
|
$ 1,200,000,000 |
| Jan 28, 2004 |
|
$ 394,000,000 |
| Sep 26, 2003 |
|
$ 65,000,000 |
| Jun 02, 2003 |
|
$ 166,000,000 |
| Oct 25, 2001 |
|
$ 362,000,000 |
| Dec 15, 2000 |
|
$ 6,900,000,000 |
| Nov 22, 1999 |
|
$ 217,000,000 |
| Jul 08, 1999 |
|
$ 680,000,000 |
| Jun 21, 1999 |
|
Undisclosed amount |
| Mar 16, 1998 |
|
$ 234,000,000 |
| Apr 29, 1997 |
|
$ 200,000,000 |
| Mar 30, 1996 |
|
$ 876,000,000 |
