Share-Based Compensation Plans (Schedule Of Changes In Stock Options) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Share-Based Compensation Plans [Abstract]
Option shares outstanding at beginning of period, Number of shares	2,204,600	2,311,000
Options granted, Number of shares	318,900	382,400
Option shares exercised, Number of shares	(640,800)	(438,300)
Options forfeited, Number of shares	(228,800)	(41,300)
Options expired, Number of shares	(52,700)	(9,200)
Option shares outstanding at end of period, Number of shares	1,601,200	2,204,600
Option shares exercisable at end of period, Number of shares	1,015,300	1,255,900
Option shares vested and expected to vest, Number of shares	1,579,600	2,038,600
Option shares outstanding at beginning of period, Weighted-average exercise price	$ 35.60	$ 30.05
Options granted, Weighted-average exercise price	$ 53.93	$ 51.75
Option shares exercised, Weighted-average exercise price	$ (27.80)	$ (19.65)
Options forfeited, Weighted-average exercise price	$ (48.03)	$ (42.81)
Options expired, Weighted-average exercise price	$ (43.49)	$ (40.40)
Option shares outstanding at end of period, Weighted-average exercise price	$ 40.33	$ 35.60
Option shares exercisable at end of period, Weighted-average exercise price	$ 34.12	$ 28.59
Option shares vested and expected to vest, Weighted-average exercise price	$ 40.17	$ 34.89
Option shares outstanding at end of period, Weighted-average remaining contractual term	6 years 10 months 24 days	7 years
Option shares exercisable at end of period, Weighted-average remaining contractual term	6 years	6 years 1 month 6 days
Option shares vested and expected to vest, Weighted-average remaining contractual term	6 years 10 months 24 days	6 years 10 months 24 days
Option shares exercised, Aggregate intrinsic value	$ 17.1	$ 15.1
Option shares outstanding at end of period, Aggregate intrinsic value	18.2	48.5
Option shares exercisable at end of period, Aggregate intrinsic value	17.3	36.4
Option shares vested and expected to vest, Aggregate intrinsic value	$ 18.2	$ 46.3