| Date | Acquired | Amount |
|---|---|---|
| Jul 04, 2016 |
|
$ 3,150,000,000 |
| Apr 11, 2012 |
|
Undisclosed amount |
| May 01, 2007 |
|
Undisclosed amount |
| Mar 30, 1995 |
|
Undisclosed amount |
| Jan 19, 1982 |
|
$ 750,000,000 |
| Dec 30, 1960 |
|
Undisclosed amount |
