Stock-Based Compensation (Summary Of Performance Share Program Activity) (Details) (USD $)	6 Months Ended
	Jun. 30, 2011
Shares held for payout	72,033
Performance Share Program [Member]
Outstanding Beginning Balance, non-vested shares	6,812,594
Granted, non-vested shares	4,314,376
Shares issued, non-vested shares	(2,450,544)	[1]
Forfeited, non-vested shares	(306,375)
Outstanding Ending Balance, non-vested shares	8,370,051
Outstanding Beginning Balance, weighted average grant date, fair value	$ 23.31
Granted, weighted average grant date, fair value	$ 28.04
Shares Issued, weighted average grant date, fair value	$ 32.82	[1]
Forfeited, weighted average grant date, fair value	$ 24.27
Outstanding Ending Balance, weighted average grant date, fair value	$ 22.93

[1] Includes 72,033 shares/units held for payout at the end of the performance period.