Share-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

Share-Based Compensation Plans [Abstract]

Schedule Of Changes In Stock Options

	Year Ended December 31, 2015
	Number of shares (thousands)	Weighted-average exercise price	Weighted-average remaining contractual term (years)	Aggregate intrinsic value (millions)
Option shares outstanding at beginning of period	1,601.2	$40.33
Option shares exercised	(173.9)	(36.45)		$3.5
Options forfeited	(17.0)	(53.08)
Option shares outstanding at end of period	1,410.3	$40.66	6.1	$10.9
Option shares exercisable at end of period	1,144.5	37.75	5.7	$10.9
Option shares vested and expected to vest	1,393.9	40.52	6.1	$10.9

	Year Ended December 31, 2014
	Number of shares (thousands)	Weighted-average exercise price	Weighted-average remaining contractual term (years)	Aggregate intrinsic value (millions)
Option shares outstanding at beginning of period	2,204.6	$35.60
Options granted	318.9	53.93
Option shares exercised	(640.8)	(27.80)		$17.1
Options forfeited	(228.8)	(48.03)
Options expired	(52.7)	(43.49)
Option shares outstanding at end of period	1,601.2	$40.33	6.9	$18.2
Option shares exercisable at end of period	1,015.3	34.12	6.0	$17.3
Option shares vested and expected to vest	1,579.6	40.17	6.9	$18.2

Schedule Of Weighted-Average Assumptions

	2014	2013
Weighted-average grant date fair value of options granted
(dollars per option)	$24.93	$21.62
Assumptions
Risk free rate of return	1.9%	1.2%
Expected volatility	46.5%	42.4%
Expected term (in years)	6.0	6.0
Expected dividend yield	0.0%	0.0%

Schedule Of Restricted Stock And Restricted Stock Units Activity

	Non-Vested Stock Awards
	Number of shares	Weighted-average fair value at grant date
December 31, 2013	153,577	$47.34
Granted	93,711	52.57
Vested	(61,902)	(41.61)
Forfeited	(9,784)	(52.08)
December 31, 2014	175,602	$51.89
Granted	308,528	55.62
Vested	(42,503)	(51.04)
Forfeited	(28,361)	(54.52)
December 31, 2015	413,266	$54.66

Schedule Of Performance Award Activity

	Non-Vested Performance Stock Awards
	Number of shares	Weighted-average fair value at grant date
December 31, 2013	390,681	$47.81
Granted	129,858	53.88
Vested	(78,125)	(41.69)
Forfeited	(108,051)	(46.37)
December 31, 2014	334,363	$52.07
Vested	(70,381)	(50.38)
Forfeited	(47,048)	(51.26)
December 31, 2015	216,934	$52.84