| Date | Acquired | Amount |
|---|---|---|
| Jul 18, 2017 |
|
$ 7,100,000,000 |
| Apr 17, 2017 |
|
$ 600,000,000 |
| Nov 01, 2016 |
|
$ 1,500,000,000 |
| Apr 08, 2016 |
|
$ 461,000,000 |
| Apr 08, 2016 |
|
$ 461,000,000 |
| Apr 30, 2015 |
|
Undisclosed amount |
| Dec 01, 2014 |
|
Undisclosed amount |
| Dec 16, 2011 |
|
$ 1,000,000,000 |
| Jul 26, 2010 |
|
Undisclosed amount |
| Jan 12, 2007 |
|
Undisclosed amount |
