Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

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

Composition of equity awards outstanding

The composition of the equity awards outstanding as of December 31, 2014 and March 31, 2015 was as follows: 

(in millions)	December 31, 2014	March 31, 2015
Restricted stock	4.3	4.1
Stock options	6.8	5.2
Total outstanding awards	11.1	9.3

Allocation of share-based compensation expense to income statement line items

Share-based compensation expense was recognized as follows: 

	Three Months Ended March 31,
(in millions)	2014			2015
Cost of revenue	$	3.8		$	4.0
Research and development	2.8			3.2
Sales and marketing	2.1			2.7
General and administrative	4.0			10.1
Pre-tax share-based compensation	12.7			20.0
Less: Income tax benefit	(4.4		)	(6.5		)
Total share-based compensation expense, net of tax	$	8.3		$	13.5