Shares and Stockholders' Equity (Changes In Preferred And Common stock (Number Of Shares)) (Details)	3 Months Ended						3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2012 Series A Preferred Stock [Member]		Mar. 31, 2013 Series A Preferred Stock [Member]	Dec. 31, 2012 Series A Preferred Stock [Member]	Mar. 31, 2013 Common Stock [Member]	Mar. 31, 2012 Common Stock [Member]
Changes In Preferred And Common Stock Number Of Shares [Line Items]
Balance as of beginning-of-period	9,532		10,072		9,532	9,532
Conversion of convertible preferred stock (in shares)			(440)	[1]
Balance as of end-of-period	9,532		9,632		9,532	9,532
Balance as of beginning-of-period	271,402,586						271,402,586	291,319,222
Conversion of convertible preferred stock								7,040	[1]
Stock compensation/issued for benefit plans (in shares)							427,429	104,197
Retirement/cancellation of shares (in shares)							(3,372,457)	(6,018,156)
Balance as of end-of-period	268,457,558						268,457,558	285,412,303
Common stock as of end-of-year:
Assuming conversion of preferred stock (in shares)	268,610,070	285,566,415
Diluted basis (in shares)	277,230,360	292,953,914

[1] Represents the conversion of Series A preferred stock into common stock.