| Date | Acquired | Amount |
|---|---|---|
| Jun 02, 2017 |
|
Undisclosed amount |
| Jul 26, 2016 |
|
Undisclosed amount |
| May 05, 2016 |
|
Undisclosed amount |
| Feb 04, 2016 |
|
Undisclosed amount |
| Aug 27, 2015 |
|
Undisclosed amount |
| Apr 09, 2015 |
|
$ 1,500,000,000 |
| Apr 02, 2015 |
|
Undisclosed amount |
| Mar 16, 2015 |
|
Undisclosed amount |
| Nov 13, 2014 |
|
Undisclosed amount |
| Jul 22, 2014 |
|
$ 175,000,000 |
| Jul 14, 2014 |
|
Undisclosed amount |
| Feb 06, 2014 |
|
Undisclosed amount |
| Apr 13, 2013 |
|
Undisclosed amount |
| May 03, 2012 |
|
Undisclosed amount |
| Feb 07, 2012 |
|
Undisclosed amount |
| Oct 11, 2011 |
|
Undisclosed amount |
| Oct 05, 2011 |
|
Undisclosed amount |
| Jan 26, 2011 |
|
Undisclosed amount |
| Sep 22, 2010 |
|
Undisclosed amount |
| Aug 04, 2010 |
|
Undisclosed amount |
