Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Stock-Based Compensation

Schedule of compensation expense

	Years Ended December 31
(in millions, except per share amounts)	2013		2012		2011
Pre-tax compensation expense	$	4.9	$	7.5	$	6.6
After-tax compensation expense	$	3.0	$	4.7	$	4.1
Impact on diluted EPS	$	0.05	$	0.07	$	0.07

Schedule of weighted-average assumptions for stock options

	Years Ended December 31
	2013			2012			2011
Expected dividend yield		1.2	%		1.5	%		1.7	%
Expected life in years		5.71			5.78			5.76
Expected volatility		32.2	%		36.0	%		32.0	%
Risk-free interest rate		1.0	%		0.9	%		2.2	%
Weighted average fair value	$	17.58		$	14.57		$	10.61

Schedule of stock option activity under the Company's stock option awards

	Number of Shares			Weighted Average Exercise Price
Outstanding at December 31, 2010		4,235,303		$	30.38
Options granted		637,255			38.23
Options exercised		(552,639	)		27.61
Options forfeited		(227,404	)		29.13
Outstanding at December 31, 2011		4,092,515		$	32.05
Options granted		488,805			49.58
Options exercised		(1,265,768	)		28.45
Options forfeited		(90,421	)		39.67
Outstanding at December 31, 2012		3,225,131		$	35.88
Options granted		283,975			64.80
Options exercised		(472,040	)		33.81
Options forfeited		(44,059	)		48.47
Outstanding at December 31, 2013		2,993,007		$	38.76

Schedule of activity related to restricted stock

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2010		624,640		$	28.10
Shares granted		111,685			38.31
Shares vested		(188,195	)		34.80
Shares forfeited		(19,555	)		20.33
Outstanding at December 31, 2011		528,575		$	27.83
Shares granted		85,990			49.60
Shares vested		(305,850	)		21.82
Shares forfeited		(24,480	)		12.18
Outstanding at December 31, 2012		284,235		$	25.99
Shares granted		71,255			64.80
Shares vested		(109,445	)		34.08
Shares forfeited		(5,055	)		47.85
Outstanding at December 31, 2013		240,990		$	49.66

Schedule of activity related to performance shares

	Number of Performance Units			2013 Awards			2012 Awards			2011 Awards			2010 Awards
Outstanding at December 31, 2010		98,835			—			—			—			98,835
Units granted		109,075			—			—			109,075			—
Units forfeited		(10,255	)		—			—			(6,135	)		(4,120	)
Outstanding at December 31, 2011		197,655			—			—			102,940			94,715
Units granted		85,990			—			85,990			—			—
Units converted to shares		86,385			—			—			—			86,385
Units vested and issued		(90,832	)		—			—			—			(90,832	)
Units vested and deferred		(24,388	)		—			—			—			(24,388	)
Units forfeited		(24,080	)		—			(6,650	)		(9,100	)		(8,330	)
Outstanding at December 31, 2012		230,730			—			79,340			93,840			57,550
Units granted		71,255			71,255			—			—			—
Units converted to shares		89,610			—			—			89,610			—
Units vested and issued		(45,544	)		—			—			—			(45,544	)
Units vested and deferred		(12,006	)		—			—			—			(12,006	)
Units forfeited		(5,055	)		(1,080	)		(1,745	)		(2,230	)		—
Outstanding at December 31, 2013		328,990			70,175			77,595			181,220			—