| Date | Acquired | Amount |
|---|---|---|
| Sep 28, 2017 | Undisclosed amount | |
| Jun 15, 2017 | Undisclosed amount | |
| Mar 06, 2017 | $ 614,000,000 | |
| Dec 01, 2016 | € 600,000,000 | |
| Nov 15, 2016 | Undisclosed amount | |
| Sep 20, 2016 | Undisclosed amount | |
| Aug 04, 2015 | Undisclosed amount | |
| Jun 09, 2015 | $ 20,000,000 | |
| Jun 04, 2015 | Undisclosed amount | |
| May 27, 2015 | $ 480,000,000 | |
| Apr 22, 2013 | $ 40,000,000 | |
| Apr 22, 2013 | $ 180,000,000 | |
| Apr 22, 2013 | Undisclosed amount | |
| Aug 16, 2011 | $ 330,000,000 | |
| Jul 29, 2011 | Undisclosed amount | |
| Jun 29, 2011 | $ 330,000,000 | |
| Apr 06, 2011 | Undisclosed amount | |
| Nov 02, 2010 | Undisclosed amount | |
| Oct 05, 2010 | Undisclosed amount | |
| Aug 12, 2010 | Undisclosed amount | |
| Mar 10, 2010 | $ 350,000,000 | |
| Feb 24, 2010 | Undisclosed amount | |
| Jan 11, 2010 | Undisclosed amount | |
| Sep 14, 2009 | $ 200,000,000 | |
| Jun 02, 2009 | Undisclosed amount | |
| Jan 05, 2009 | Undisclosed amount | |
| Nov 01, 2008 | Undisclosed amount | |
| Oct 07, 2008 | Undisclosed amount | |
| Oct 06, 2008 | Undisclosed amount | |
| Sep 30, 2006 | Undisclosed amount | |
| Jul 11, 2006 | Undisclosed amount | |
| Jun 13, 2006 | Undisclosed amount | |
| May 09, 2006 | $ 75,000,000 | |
| Jan 12, 2006 | Undisclosed amount | |
| Jan 05, 2006 | $ 375,000,000 | |
| Oct 17, 2005 | Undisclosed amount | |
| Jun 27, 2005 | Undisclosed amount | |
| Jun 09, 2005 | $ 350,000,000 | |
| Apr 07, 2005 | $ 350,000,000 | |
| Oct 06, 2004 | $ 430,000,000 | |
| Aug 16, 2004 | Undisclosed amount | |
| Mar 21, 2004 | Undisclosed amount | |
| Jul 14, 2003 | Undisclosed amount | |
| Feb 05, 2003 | Undisclosed amount | |
| Feb 15, 2002 | $ 3,910,000,000 | |
| Jan 02, 2002 | $ 3,500,000,000 | |
| Jan 06, 1999 | Undisclosed amount | |
| Oct 29, 1998 | Undisclosed amount | |
| Sep 04, 1998 | Undisclosed amount | |
| Aug 07, 1998 | Undisclosed amount | |
| Dec 23, 1997 | Undisclosed amount | |
| Oct 08, 1996 | Undisclosed amount | |
| Aug 01, 1995 | Undisclosed amount | |
| Jun 22, 1994 | Undisclosed amount |