| Date | Acquired | Amount |
|---|---|---|
| Jan 26, 2017 |
|
$ 300,000,000 |
| Jan 10, 2017 |
|
$ 45,000,000 |
| Dec 02, 2016 |
|
Undisclosed amount |
| Oct 17, 2016 |
|
$ 600,000,000 |
| Jul 14, 2015 |
|
$ 7,320,000,000 |
| Apr 27, 2015 |
|
$ 485,000,000 |
| Jan 26, 2012 |
|
$ 350,000,000 |
| Jun 30, 2010 |
|
Undisclosed amount |
| Dec 07, 2009 |
|
$ 640,000,000 |
| Nov 19, 2007 |
|
$ 2,900,000,000 |
| Nov 13, 2002 |
|
Undisclosed amount |
| Jun 30, 2000 |
|
Undisclosed amount |
