Notes Payable (Tables)

12 Months Ended

Dec. 31, 2011

Notes Payable [Abstract]

Schedule of senior unsecured notes payable

December 31,	2011		2010
5.375% notes, issued in March 2003 and due in March 2013	$	100	$	100
5.5% notes, issued in November 2003 and due in November 2015	150		150
5.95% notes, issued in September 2006 and due in September 2016	275		275
5.375% notes, issued in September 2005 and due in September 2017	175		175
6.75% notes, issued in September 2007 and due in August 2019	550		550
5.75% notes, issued in June 2010 and due in January 2021	250		250
5.875% bonds, $100 issued in March 2005 and $150 issued in June 2011, both due in March 2035	250		100
	$	1,750	$	1,600

Maturity of notes and bonds payable

Year of Maturity	Notes and Bonds
2012	$           --
2013	100
2014	--
2015	150
2016	275
Thereafter	1,225
Totals	$  1,750