Compensation Plans (Other Cash-Based Awards) (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Awards Under the EIP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash awards	$ 85	$ 112	$ 66
Other Variable Compensation Programs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash awards	$ 386	$ 422	$ 288