Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Share-Based Compensation

Schedule of information with respect to share-based compensation

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
(in millions)	2012		2011		2012		2011
Total share-based compensation expense included in net income	$	4.2	$	4.1	$	8.5	$	7.4
Income tax benefit related to share-based compensation included in net income	$	1.2	$	1.4	$	2.6	$	2.5

Schedule of valuation assumptions for stock options

	For the Six Months Ended
	June 30, 2012		June 30, 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	460		55.96
Exercised	(467	)	26.35
Cancelled	(18	)	40.07
Outstanding at June 30, 2012	4,005		33.65		6.09	$	66,503
Exercisable at June 30, 2012	3,038		29.34		5.21	$	61,327

Schedule of additional information pertaining to stock option activity

	Three Months Ended June 30,				Six Months Ended June 30,
(dollars in thousands, except per share)	2012		2011		2012		2011
Weighted average grant date fair value of stock options granted (per share)	$	16.56	$	16.65	$	16.16	$	15.17
Total intrinsic value of stock options exercised	$	3,058	$	9,521	$	14,055	$	15,181

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	—		—		162		55.96
Vested	(34	)	33.61		(9	)	36.77
Cancelled	(4	)	25.58		(6	)	46.60
Non-vested at June 30, 2012	98		29.87		382		49.56