Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Share-based Compensation [Abstract]

Share-Based Compensation Expense

The expense recognized for the three and six months ended June 30 were as follows:

	Three months ended						Six months ended
In millions	2016			2015			2016			2015
Stock options	$	3.9		$	3.2		$	11.4		$	9.9
RSUs	6.9			6.7			16.4			15.7
Performance shares	5.0			4.3			9.5			11.9
Other	0.9			(0.5		)	2.7			0.7
Pre-tax expense	16.7			13.7			40.0			38.2
Tax benefit	(6.4		)	(5.2		)	(15.3		)	(14.6		)
After-tax expense	$	10.3		$	8.5		$	24.7		$	23.6

Grants of Stock Options and RSUs

Grants issued during the six months ended June 30 were as follows:

	2016			2015
	Number granted	Weighted- average fair value per award		Number granted	Weighted- average fair value per award
Stock options	1,958,476	$	9.42	1,333,849	$	14.15
RSUs	482,001	$	51.13	411,968	$	66.82

Average fair value of stock options, assumptions

The following assumptions were used during the six months ended June 30:

	2016		2015
Dividend yield	2.55	%	1.73	%
Volatility	28.60	%	28.56	%
Risk-free rate of return	1.12	%	1.24	%
Expected life in years	4.8		4.9