| Date | Acquired | Amount |
|---|---|---|
| Oct 10, 2017 |
|
$ 752,000,000 |
| Sep 06, 2017 |
|
Undisclosed amount |
| Jul 11, 2016 |
|
Undisclosed amount |
| Jun 09, 2016 |
|
$ 1,250,000,000 |
| Jan 13, 2016 |
|
Undisclosed amount |
| Jul 28, 2015 |
|
$ 95,000,000 |
| Dec 18, 2014 |
|
$ 375,000,000 |
| Dec 08, 2014 |
|
$ 8,400,000,000 |
| Sep 11, 2014 |
|
Undisclosed amount |
| Jun 30, 2014 |
|
Undisclosed amount |
| Jun 09, 2014 |
|
$ 3,850,000,000 |
| Apr 05, 2011 |
|
Undisclosed amount |
| Dec 02, 2010 |
|
$ 500,000,000 |
| Jan 01, 2009 |
|
Undisclosed amount |
| Jul 25, 2007 |
|
$ 366,400,000 |
| Oct 01, 2006 |
|
$ 1,100,000,000 |
| Nov 19, 1993 |
|
$ 6,000,000 |
