| Date | Acquired | Amount |
|---|---|---|
| Mar 13, 2017 |
|
$ 230,000,000 |
| Mar 30, 2016 |
|
Undisclosed amount |
| Nov 05, 2015 |
|
$ 1,450,000,000 |
| Jun 23, 2015 |
|
$ 1,500,000,000 |
| Mar 30, 2015 |
|
Undisclosed amount |
| Oct 02, 2014 |
|
Undisclosed amount |
| Jul 09, 2014 |
|
Undisclosed amount |
| Jun 11, 2013 |
|
Undisclosed amount |
| Jun 10, 2013 |
|
$ 2,500,000,000 |
| Jan 09, 2013 |
|
Undisclosed amount |
| Sep 17, 2009 |
|
$ 800,000,000 |
| Sep 16, 2009 |
|
Undisclosed amount |
| Jan 08, 2009 |
|
Undisclosed amount |
| May 02, 2008 |
|
Undisclosed amount |
| Jan 01, 2008 |
|
Undisclosed amount |
| May 29, 2007 |
|
$ 1,400,000,000 |
