Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options outstanding, Beginning balance	9,558,346
Options outstanding, Weighted-average exercise price, Beginning balance (in usd per share)	$ 79.77
Number of options granted	600,700
Options granted, Weighted-average exercise price (in usd per share)	$ 64.60
Number of options exercised	(450,228)
Options exercised, Weighted-average exercise price (in usd per share)	$ 53.69
Number of Options forfeited/expired	(68,969)
Options forfeited/expired, Weighted-average exercise price (in usd per share)	$ 78.38
Number of options outstanding, Ending balance	9,639,849	9,558,346
Options outstanding, Weighted-average exercise price, Ending balance (in usd per share)	$ 80.06	$ 79.77
Options outstanding, Aggregate intrinsic value (in usd per share)	$ 0
Weighted-Average Contractual Life, Options outstanding	4 years 6 months
Options exercisable, Number of Options	8,782,153
Options exercisable, Weighted-Average Exercise Price (in usd per share)	$ 81.32
Options exercisable, Aggregate intrinsic value (in usd per share)	$ 0
Weighted-Average Contractual Life, Options exercisable	5 years 2 months 12 days
Weighted-average grant-date fair value of options granted (in USD per share)	$ 8.00	$ 9.42	$ 11.48