| Date | Acquired | Amount |
|---|---|---|
| Oct 16, 2017 |
|
$ 1,350,000,000 |
| Oct 16, 2017 |
|
$ 1,000,000,000 |
| Nov 11, 2015 |
|
Undisclosed amount |
| Feb 23, 2014 |
|
Undisclosed amount |
| Aug 29, 2011 |
|
$ 145,000,000 |
| Mar 18, 2011 |
|
Undisclosed amount |
| Mar 18, 2011 |
|
Undisclosed amount |
| Mar 18, 2011 |
|
Undisclosed amount |
| Oct 02, 2009 |
|
€ 50,000,000 |
| Jun 05, 2006 |
|
Undisclosed amount |
| May 11, 2006 |
|
Undisclosed amount |
| Feb 28, 1992 |
|
Undisclosed amount |
