Share-Based Compensation Plans (Share Options Outstanding And Exercisable) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number Outstanding	888,184
Options Outstanding, Weighted Average-Remaining Contractual Life	5 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 86.05
Options Exercisable, Number Exercisable	562,684
Options Exercisable, Weighted-Average Exercise Price	$ 85.41
$ 66.0780 - $77.0910 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Ranges of Exercise Prices, Lower range limit	$ 66.0780
Ranges of Exercise Prices, Upper range limit	$ 77.0910
Options Outstanding, Number Outstanding	158,810
Options Outstanding, Weighted Average-Remaining Contractual Life	4 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 71.72
Options Exercisable, Number Exercisable	158,810
Options Exercisable, Weighted-Average Exercise Price	$ 71.72
$ 77.0911 - $88.1040 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Ranges of Exercise Prices, Lower range limit	$ 77.0911
Ranges of Exercise Prices, Upper range limit	$ 88.1040
Options Outstanding, Number Outstanding	354,240
Options Outstanding, Weighted Average-Remaining Contractual Life	5 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 85.74
Options Exercisable, Number Exercisable	190,540
Options Exercisable, Weighted-Average Exercise Price	$ 85.56
$ 88.1041 - $99.1170 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Ranges of Exercise Prices, Lower range limit	$ 88.1041
Ranges of Exercise Prices, Upper range limit	$ 99.1170
Options Outstanding, Number Outstanding	305,180
Options Outstanding, Weighted Average-Remaining Contractual Life	5 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 90.72
Options Exercisable, Number Exercisable	143,380
Options Exercisable, Weighted-Average Exercise Price	$ 93.39
$ 99.1171 - $110.1300 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Ranges of Exercise Prices, Lower range limit	$ 99.1171
Ranges of Exercise Prices, Upper range limit	$ 110.1300
Options Outstanding, Number Outstanding	69,954
Options Outstanding, Weighted Average-Remaining Contractual Life	3 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 99.77
Options Exercisable, Number Exercisable	69,954
Options Exercisable, Weighted-Average Exercise Price	$ 99.77