Share-Based Compensation and Capital Stock (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Weighted Average Assumptions Of Black-Scholes Option-Pricing Model

The fair value of the options granted was estimated on the grant date using the Black-Scholes option-pricing model with the following weighted average assumptions:

	2013 Grants			2012 Grants
Risk-free interest rate	0.73		%	0.78		%
Expected volatility	38.14		%	40.15		%
Expected life of stock option	4.5 years			4.4 years
Dividend yield	2.01		%	2.08		%
Requisite service period	4 years			4 years
Contractual life	7 years			7 years
Weighted average fair value of options granted	$	9.89		$	9.98

Summary Of Activity Related To Restricted Stock Grants

The following table is a summary of activity related to restricted stock grants:

	Three Months Ended
	March 31,
	2013		2012
Restricted share grants	194,541		238,019
Weighted average grant date fair value per share	$	36.76	$	35.70
Aggregate grant date fair value ($000)	$	7,151	$	8,497
Restricted shares forfeited	21,499		4,328
Vesting service period of shares granted	3 - 4 years		36 - 68 months
Grant date fair value of shares vested ($000)	$	6,999	$	5,013

Summary Of Activity Related To PVRSU Grants

The following table is a summary of activity related to PVRSU grants:

	Three Months Ended
	March 31,
	2013		2012
Performance vested restricted stock units granted at target	58,902		38,476
Weighted average grant date fair value per share	$	36.76	$	35.60
Aggregate grant date fair value ($000)	$	2,165	$	1,370
Stock units forfeited	—		—
Requisite service period	22-36 months		3 years

Summary Of Change In Stock-Based Award Activity

A summary of stock-based award activity as of March 31, 2013 and changes during the three months ended are presented below:

	Stock Options					Restricted Stock				Performance Vested Restricted  Stock Units
	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2013	1,934,034		$	25.80		606,547		$	35.17	170,116		$	35.56
Granted	173,413		36.76			194,541		36.76		58,902		36.76
Performance based leveraging (1)	—		—			—		—		9,192		32.60
Exercised/Vested	(204,323	)	26.27			(207,622	)	33.71		(39,816	)	32.60
Expired	(75,473	)	36.99			—		—		—		—
Forfeited	—		—			(21,499	)	34.74		—		—
Outstanding at March 31, 2013	1,827,651		$	26.32	4.3 years	571,967		$	36.25	198,394		$	36.37
Options exercisable at March 31, 2013	1,317,396		$	24.61	3.0 years

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Pre-Tax Stock-Based Compensation Expenses And Associated Income Tax Benefits

The components of the Company’s pretax stock-based compensation expense and associated income tax benefits are as follows for the three months ended March 31, 2013 and 2012:

	Three Months Ended
	March 31,
(in millions)	2013		2012
Stock options	$	0.5	$	0.6
Restricted stock	1.8		2.0
Performance vested restricted stock units	0.6		0.2
Total	$	2.9	$	2.8
Income tax benefits	$	1.1	$	1.0