| Date | Acquired | Amount |
|---|---|---|
| May 23, 2016 |
|
$ 62,000,000,000 |
| Feb 15, 2016 |
|
Undisclosed amount |
| Nov 05, 2014 |
|
$ 589,000,000 |
| Oct 01, 2014 |
|
$ 14,200,000,000 |
| Dec 19, 2013 |
|
Undisclosed amount |
| Jul 01, 2012 |
|
$ 425,000,000 |
| Feb 13, 2006 |
|
Undisclosed amount |
| Mar 09, 2005 |
|
Undisclosed amount |
