Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Share-Based Compensation

Schedule of information with respect to share-based compensation

	For the Three Months Ended March 31,
(in millions)	2012		2011
Total share-based compensation expense included in net income	$	4.3	$	3.3
Income tax benefit related to share-based compensation included in net income	$	1.4	$	1.1

Schedule of valuation assumptions for stock options

	March 31,  2012		March 31,  2011
Expected life (in years)	5.8		5.8
Risk-free interest rate	1.07	%	2.76	%
Expected volatility	33.33	%	32.71	%
Expected dividend yield	1.18	%	1.17	%

Schedule of stock option activity

(dollars and shares in thousands)	Number of Options		Weighted Average Exercise Price		Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2011	4,030		$	30.29
Granted	457		55.95
Exercised	(363	)	26.32
Cancelled	(9	)	36.66
Outstanding at March 31, 2012	4,115		33.48		6.30	$	99,451
Exercisable at March 31, 2012	3,101		29.28		5.42	$	87,991

Schedule of additional information pertaining to stock option activity

	Three Months Ended March 31,
(dollars in thousands, except per share)	2012		2011
Weighted average grant date fair value of stock options granted (per share)	$	16.16	$	15.16
Total intrinsic value of stock options exercised	$	10,997	$	5,660

Schedule of restricted share and restricted stock unit activity

	Restricted Shares				Restricted Units
(in thousands except per share)	Number of Restricted Shares		Weighted Average Fair Value		Number of Restricted Units		Weighted Average Fair Value
Non-vested at December 31, 2011	136		$	30.69	235		$	44.24
Granted	—		—		151		55.97
Vested	(34	)	33.61		—		—
Cancelled	(4	)	25.58		(1	)	47.98
Non-vested at March 31, 2012	98		29.87		385		48.93