Shareholders' Equity (Stock Options Activity Roll Forward) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012
Stock Options [Member]
Options, Outstanding at beginning of period	45,384,554
Options, Granted	4,683,073
Options, Exercised	(282,446)
Options, Forfeited or expired	(2,872,746)
Options, Outstanding at end of period	46,912,435
Options, Exercisable at end of period	35,303,412
Number of options expected to vest	44,861,092
Wtd. Avg. Exercise Price [Member]
Wtd. Avg. Exercise Price, Outstanding at beginning of period	34.42
Wtd. Avg. Exercise Price, Granted	30.09
Wtd. Avg. Exercise Price, Exercised	22.90
Wtd. Avg. Exercise Price, Forfeited or expired	36.78
Wtd. Avg. Exercise Price, Outstanding at end of period	33.92
Wtd. Avg. Exercise Price, Exercisable at end of period	35.76
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price	33.95