7. Notes Payable

Our senior unsecured notes and bonds consist of the following at March 31, 2012 and December 31, 2011, sorted by maturity date (dollars in millions):

5.375% notes, issued in March 2003 and due in March 2013	$	100
5.5% notes, issued in November 2003 and due in November 2015		150
5.95% notes, issued in September 2006 and due in September 2016		275
5.375% notes, issued in September 2005 and due in September 2017		175
6.75% notes, issued in September 2007 and due in August 2019		550
5.75% notes, issued in June 2010 and due in January 2021		250
5.875% bonds, $100 issued in March 2005 and $150 issued in June 2011, both due in March 2035		250
	$	1,750