Long-Term Incentive Plans (Number Of Options Granted) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2010	Mar. 31, 2009	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Granted	1,100,000	1,900,000	1,100,000	1,900,000
Proxy Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Granted			600,000	1,750,000
Other Senior Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Granted
Senior Officers [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Granted			600,000	1,750,000
Other [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Granted			500,000	150,000