Share Plans (Tables)

3 Months Ended

Mar. 28, 2015

Share-based Compensation Expense

Total share-based compensation expense for the three months ended March 28, 2015 and March 29, 2014 was as follows:

	Three months ended
In millions	March 28, 2015		March 29, 2014
Restricted stock units	$	6.2	$	4.9
Stock options	3.5		2.5
Total share-based compensation expense	$	9.7	$	7.4

Assumptions Used in Calculating Estimated Fair Value of Stock Option Award

We estimated the fair value of each stock option award issued in the annual share-based compensation grant using a Black-Scholes option pricing model, modified for dividends and using the following assumptions:

	2015 Annual Grant
Risk-free interest rate	1.61	%
Expected dividend yield	1.96	%
Expected share price volatility	30.4	%
Expected term (years)	6.0