Stock-Based Compensation (Schedule of Restricted and Performance Stock Unit Activity) (Details) In Thousands	6 Months Ended
	Jun. 30, 2011
Restricted Stock Units [Member]
Outstanding, beginning of year	20,923
Granted	5,890
Payments	(7,564)
Cancelled/Forfeited	(69)
Outstanding, June 30, 2011	19,180
Performance Stock Units [Member]
Outstanding, beginning of year	32,380
Granted	9,141
Payments	(12,137)
Cancelled/Forfeited	(105)
Outstanding, June 30, 2011	29,279