Share-Based Compensation (Tables)

6 Months Ended

Sep. 30, 2017

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

Schedule of share-based compensation activity

The following table summarizes the Company's share-based compensation activity during the six months ended September 30, 2017:

	Options		Restricted Shares		Service-Based RSUs		Performance-Based RSUs
Outstanding/Unvested at April 1, 2017	4,791,045		185,425		1,470,767		401,777
Granted	208,264		—		1,086,859		139,562
Exercised/Vested	(405,951	)	(102,908	)	(385,286	)	(81,212	)
Decrease due to performance condition	—		—		—		(12,891	)
Canceled/forfeited	(58,309	)	(4,076	)	(36,688	)	—
Outstanding/Unvested at September 30, 2017	4,535,049		78,441		2,135,652		447,236

Assumptions Used to Estimate Fair Value of Options

The following table presents assumptions used to estimate the fair value of options granted during the six months ended September 30, 2017 and October 1, 2016:

	Six Months Ended
	September 30 2017		October 1 2016
Expected dividend yield	0.0	%	0.0	%
Volatility factor	36.3	%	30.1	%
Weighted average risk-free interest rate	1.8	%	1.1	%
Expected life of option	4.69 years		4.75 years

Summary of Compensation Expense Attributable to Share-Based Compensation

The following table summarizes compensation expense attributable to share-based compensation for the three and six months ended September 30, 2017 and October 1, 2016 (in millions):

	Three Months Ended				Six Months Ended
	September 30, 2017		October 1, 2016		September 30, 2017		October 1, 2016
Share-based compensation expense	$	10.3	$	11.6	$	21.1	$	21.4
Tax benefits related to share-based compensation expense	$	3.2	$	3.8	$	6.8	$	7.5