Share-Based Compensation Plans (Schedule Of Total Stock Option Activity And Amounts) (Details) (Stock Options [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Stock Options [Member]
Number of shares outstanding, beginning balance	7,943,293
Number of shares, granted	1,020,023
Number of shares, exercised	(1,935,581)
Number of shares, canceled/forfeited	(136,869)
Number of shares outstanding, ending balance	6,890,866
Number of shares, exercisable	4,293,291
Weighted average exercise price, beginning balance	$ 71.64
Weighted average exercise price, granted	$ 84.87
Weighted average exercise price, exercised	$ 55.94
Weighted average exercise price, canceled/forfeited	$ 84.67
Weighted average exercise price, ending balance	$ 77.75
Weighted average exercise price, exercisable	$ 73.47
Weighted average remaining contractual term (years), outstanding, ending balance	6.5
Weighted average remaining contractual term (years), exercisable	4.9
Aggregate intrinsic value, outstanding, ending balance	$ 57.5
Aggregate intrinsic value, exercisable	$ 54.7