| Date | Acquired | Amount |
|---|---|---|
| Aug 03, 2017 |
|
Undisclosed amount |
| Jul 05, 2016 |
|
Undisclosed amount |
| Mar 23, 2016 |
|
$ 600,000,000 |
| Nov 02, 2015 |
|
$ 2,000,000,000 |
| Feb 23, 2015 |
|
$ 1,250,000,000 |
| Nov 04, 2014 |
|
$ 444,000,000 |
| Apr 29, 2014 |
|
$ 725,000,000 |
| Jul 01, 2012 |
|
$ 5,300,000,000 |
| Jan 07, 2012 |
|
$ 2,500,000,000 |
| Jul 21, 2011 |
|
$ 475,000,000 |
| Sep 08, 2010 |
|
$ 885,000,000 |
| Jul 22, 2009 |
|
Undisclosed amount |
| Aug 01, 2008 |
|
Undisclosed amount |
| Jul 31, 2008 |
|
Undisclosed amount |
| May 28, 2008 |
|
$ 190,000,000 |
| Oct 02, 2001 |
|
Undisclosed amount |
| Jan 01, 1967 |
|
Undisclosed amount |
